阅读说明：本技术 牙齿矫治系统、设计方法、制备方法及预测方法 (Tooth correcting system, design method, preparation method and prediction method ) 是由 王星星 吴刚 姚峻峰 于 2020-12-31 设计创作，主要内容包括：本发明提供了一种牙齿矫治系统、设计方法、制备方法和预测方法,包括壳状牙齿矫治器,矫治器本体上还设有与一颗或多颗未生长至萌出预定参数牙齿间隙设置的萌出部,随着矫治计划的进行,每个壳状牙齿矫治器上萌出部均具有恒定或基本恒定的柱体结构。本发明的壳状牙齿矫治器具有矫正牙齿畸形的效果,同时萌出部用于接纳未生长至萌出预定参数的牙齿,萌出部与萌牙的间隙设置使得矫治器本体在佩戴后,会于萌牙的上方预留出牙齿生长的空间,因而各壳状牙齿矫治器在佩戴时均不会干涉牙齿的自然生长；另外,本发明具有恒定或基本恒定的柱体结构的萌出部的设计、使用更加简单,其可以作为一个标准附件,使用时通过选定该标准附件在牙颌模型上插入即可。(The invention provides a tooth correcting system, a design method, a preparation method and a prediction method, wherein the tooth correcting system comprises shell-shaped tooth correcting devices, the correcting device body is also provided with one or more eruption parts which are arranged in a gap mode with teeth which do not grow to eruption preset parameters, and the eruption part on each shell-shaped tooth correcting device is provided with a constant or basically constant column structure along with the progress of a correcting plan. The shell-shaped tooth appliance has the effect of correcting tooth deformity, the eruption part is used for receiving teeth which do not grow to eruption preset parameters, and the gap between the eruption part and the eruption teeth is arranged, so that a space for tooth growth can be reserved above the eruption teeth after the appliance body is worn, and the shell-shaped tooth appliance cannot interfere with the natural growth of the teeth when being worn; in addition, the eruption part with a constant or basically constant column structure is simpler to design and use, can be used as a standard accessory, and can be inserted on the dental model by selecting the standard accessory when in use.)

1. A tooth correcting system comprises at least one shell-shaped tooth correcting device which enables teeth to be gradually adjusted from an initial position to a target correcting position according to a correcting plan and allows teeth to erupt naturally, and is characterized in that the shell-shaped tooth correcting device comprises a correcting device body, the correcting device body comprises a geometric structure used for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth, and the correcting device body is further provided with at least one eruption part used for accommodating one or more teeth which do not grow to erupt preset parameters; as the correcting plan is carried out, the eruption part on each shell-shaped tooth corrector is provided with a constant or basically constant column structure, and the inner surface of the eruption part and the outer surface of the tooth which does not grow to erupt to the preset parameters are arranged in a clearance mode; the predetermined eruption parameter includes a tooth parameter after complete eruption of one or more teeth that have not grown or that have not fully grown.

2. The dental appliance system of claim 1, wherein the predetermined eruption parameters include a size, position, shape, and orientation of the one or more teeth that are not grown or that are not fully grown after full eruption.

3. The dental appliance system of claim 1 or 2, wherein the constant or substantially constant post structure is set based on the size, position, shape and orientation of the one or more teeth that have not grown to a predetermined parameter for eruption after full eruption.

4. The dental appliance system of claim 3, wherein the post structures have a size that is 1.02 to 1.05 times the size of the one or more teeth that have not grown to a predetermined parameter for eruption after full eruption; the orientation of the column structure is an angle of 0-5 degrees with the long axis orientation of the one or more teeth which are not grown to the preset eruption parameter and are completely erupted; the offset of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted in the space three-dimensional coordinate system is 0-1 mm; the offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm.

5. The dental appliance system of claim 3, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth corresponding to the jaw and the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the upper and lower jaw bite relationship settings.

6. The dental appliance system of claim 1 or 2, wherein the constant or substantially constant columnar structure is set based on both the first predetermined parameter of the mesial-direction neighboring tooth and the second predetermined parameter of the distal-direction neighboring tooth of the one or more teeth that have not grown to the predetermined parameter of eruption.

7. The dental appliance system of claim 6, wherein the first predetermined parameter comprises: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

8. The dental appliance system of claim 7, wherein the constant or substantially constant columnar structure includes labial/buccal sides that are planar or smoothly curved with labial/buccal sides of the mesial-distal adjacent teeth, lingual sides that are planar or smoothly curved with lingual sides of the mesial-distal adjacent teeth, and an occlusal side that is planar or smoothly curved with occlusal sides of the mesial-distal adjacent teeth.

9. The dental appliance system of claim 6, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth corresponding to the jaw and the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the upper and lower jaw bite relationship settings.

10. The dental appliance system of claim 1 or 2, wherein the constant or substantially constant post structure is set based on a third predetermined parameter of the one or more teeth that have not grown to erupt at the predetermined parameter.

11. The dental appliance system of claim 10, wherein the third predetermined parameter comprises: a maximum size of a buccal-lingual radial direction of the distal-direction adjacent tooth, a maximum size of a proximal-distal direction, and a maximum size of a tooth major axis direction height of the proximal-direction adjacent tooth.

12. The dental appliance system of claim 10, wherein the constant or substantially constant columnar structure includes labial/buccal sides that are planar or smoothly curved with labial/buccal sides of the mesial-distal adjacent teeth, lingual sides that are planar or smoothly curved with lingual sides of the mesial-distal adjacent teeth, and an occlusal side that is planar or smoothly curved with occlusal sides of the mesial-distal adjacent teeth.

13. The dental appliance system of claim 10, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth corresponding to the jaw and the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the upper and lower jaw bite relationship settings.

14. The dental appliance system of claim 1, wherein the constant or substantially constant columnar structure is a cylindrical structure, an elliptical columnar structure, or a polygonal columnar structure having a number of lateral edges of not less than four.

15. The dental appliance system of claim 1, wherein the shell dental appliance has a geometry other than eruption such that teeth other than unerupted teeth are gradually adjusted from an initial position to a target appliance position.

16. A design method of a tooth correcting system is characterized by comprising the following steps:

s1, acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;

s2, cutting and identifying the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model; identifying and marking data representing teeth that are not erupting or are not completely erupted;

s3, virtual design of the correction plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;

s4, designing a tooth correction system:

the shell-shaped tooth appliance comprises an appliance body, wherein the appliance body comprises a geometric structure for accommodating a plurality of upper jaw teeth or a plurality of lower jaw teeth, and the appliance body is also provided with at least one eruption part for accommodating one or more teeth which do not grow to erupt preset parameters;

with the progress of the correcting plan, the eruption part on each shell-shaped tooth corrector is provided with a constant or basically constant column structure, and the inner surface of the eruption part and the outer surface of the tooth which does not grow to erupt preset parameters are arranged in a clearance mode; the predetermined eruption parameter is designed to include a tooth parameter after complete eruption of the one or more non-grown or incompletely grown teeth.

17. The method of claim 16, wherein the predetermined eruption parameters include a size, position, shape, and orientation of the one or more teeth that are not grown or that are not fully grown after the teeth are fully erupted.

18. The method of claim 16 or 17, wherein the constant or substantially constant columnar structure is based on a size, position, shape, and orientation of the one or more teeth after full eruption that have not grown to erupt at predetermined parameters.

19. The method of claim 18, wherein the post structures have a size that is 1.02 to 1.05 times the size of the one or more teeth that have not grown to a size that is less than the size of the teeth after the teeth that erupt to the predetermined parameters completely erupt; the orientation of the column structure is an angle of 0-5 degrees with the long axis orientation of the one or more teeth which are not grown to the preset parameter of eruption and are completely erupted; the offset of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted in the space three-dimensional coordinate system is 0-1 mm; the offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm.

20. The method of claim 18, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt to a predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

21. The method of claim 16 or 17, wherein the constant or substantially constant columnar structure is set based on both a first predetermined parameter of mesial-direction neighboring teeth and a second predetermined parameter of distal-direction neighboring teeth of the one or more teeth that have not grown to the predetermined parameter of eruption.

22. The method of designing a dental appliance system of claim 21, wherein the first predetermined parameters include: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

23. The method of claim 22, wherein the constant or substantially constant columnar structure is configured to include labial/buccal surfaces that are flat or curved with smooth transitions from the labial/buccal surfaces of the teeth adjacent to the mesial or distal direction thereof, lingual surfaces that are flat or curved with smooth transitions from the lingual surfaces of the teeth adjacent to the mesial or distal direction thereof, and occlusal surfaces that are flat or curved with smooth transitions from the occlusal surfaces of the teeth adjacent to the mesial or distal direction thereof.

24. The method of claim 22, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt at the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

25. The method of claim 16 or 17, wherein the constant or substantially constant columnar structure is set based on a third predetermined parameter of the one or more teeth that are not grown to eruption of the predetermined parameter in the mesial and mesial neighboring teeth.

26. The method of claim 25, wherein the third predetermined parameter comprises: a maximum size in a buccal-lingual radial direction of the distal-direction adjacent tooth, a maximum size in a mesial-distal direction, and a maximum size in a tooth major axis direction height of the mesial-direction adjacent tooth.

27. The method of claim 25, wherein the constant or substantially constant columnar structure is configured to include labial/buccal surfaces that are flat or curved with smooth transitions from the labial/buccal surfaces of the teeth adjacent to the mesial or distal direction thereof, lingual surfaces that are flat or curved with smooth transitions from the lingual surfaces of the teeth adjacent to the mesial or distal direction thereof, and occlusal surfaces that are flat or curved with smooth transitions from the occlusal surfaces of the teeth adjacent to the mesial or distal direction thereof.

28. The method of claim 25, wherein the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt to a predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

29. The method of claim 16, wherein the constant or substantially constant columnar structure is a cylindrical structure, an elliptical columnar structure, or a polygonal columnar structure having a number of lateral edges of not less than four.

30. The method of claim 16, wherein the shell-shaped dental appliance has a geometry other than eruption that is designed to gradually adjust teeth other than unerupted teeth from an initial position to a target correction position.

31. A method for preparing a dental appliance system, which is characterized in that shell-shaped dental appliances in the dental appliance system obtained by the design method of any one of claims 16 to 30 are manufactured by adopting hot-pressing film forming or an additive manufacturing process to obtain the series of shell-shaped dental appliances.

32. A prediction method of a shell-shaped tooth appliance eruption cavity is characterized in that at least one shell-shaped tooth appliance which enables teeth to be gradually adjusted from an initial position to a target correction position and can erupt teeth simultaneously is designed according to a correction plan; one of the shell-shaped dental appliances comprises an appliance body of a geometric structure for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth and at least one eruption cavity for accommodating one or more teeth which do not grow to erupt at a predetermined parameter;

the eruption cavity is predicted based on a first preset parameter of a near-middle adjacent tooth and a second preset parameter of a far-middle adjacent tooth of one or more teeth which do not grow to eruption preset parameters, so that the inner surface of the eruption cavity and the outer surfaces of the one or more teeth which do not grow to eruption preset parameters are arranged in a gap mode; the eruption predetermined parameter is designed to include a tooth parameter after complete eruption of one or more non-grown or incompletely grown teeth.

33. The method of claim 32, wherein the first predetermined parameter comprises a ratio of the mesial adjacent teeth: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

34. The method of claim 32, wherein the eruption cavity is further configured based on the size, position, shape and orientation of teeth corresponding to the jaw and the one or more teeth that do not grow to erupt predetermined parameters, such that the structure of the eruption cavity does not affect the maxillomandibular engagement setting.

35. A prediction method of a shell-shaped tooth appliance eruption cavity is characterized in that at least one shell-shaped tooth appliance which enables teeth to be gradually adjusted from an initial position to a target correction position and can erupt teeth simultaneously is designed according to a correction plan; one of the shell-shaped dental appliances comprises an appliance body of a geometric structure for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth and at least one eruption cavity for accommodating one or more teeth which do not grow to erupt at a predetermined parameter;

the eruption cavity is predicted based on a third preset parameter of far-middle-direction adjacent teeth and near-middle-direction adjacent teeth of the one or more teeth which do not grow to eruption preset parameters, so that the inner surface of the eruption cavity and the outer surfaces of the one or more teeth which do not grow to eruption preset parameters are arranged in a gap mode; the eruption predetermined parameter is designed to include a tooth parameter after complete eruption of one or more non-grown or incompletely grown teeth.

36. The method of claim 35, wherein the third predetermined parameter comprises: the tooth is characterized by comprising a maximum size of the far-middle-direction adjacent tooth in the buccal-lingual radial direction, a maximum size of the near-far-middle direction and a maximum size of the tooth long-axis direction height of the near-middle-direction adjacent tooth.

37. The method of claim 35, wherein the eruption cavity is further configured based on the size, position, shape and orientation of teeth corresponding to the jaw and the one or more teeth that do not grow to erupt predetermined parameters, such that the structure of the eruption cavity does not affect the occlusal relationship of the upper and lower jaws.

Technical Field

The invention belongs to the field of medical appliances, particularly relates to the field of invisible orthodontics, and more particularly relates to a tooth correction system, a design method, a preparation method and a eruption prediction method, which are applied to tooth correction of teenagers in a tooth replacement period.

Background

The invisible orthodontic appliance is attractive, comfortable to wear and good in orthodontic effect, and is accepted by consumers. Wherein teenagers are some special cases, it drops to have deciduous teeth in its certain stage, the stage that the permanent tooth erupted, it corrects to have a difference with adult permanent tooth, if use the stealthy in-process of correcting the ware to carry out the tooth according to the structure the same rather than the intraoral actual model and correct, then probably the part that corresponds not erupted tooth in the stealthy ware of correcting is rescued and is covered by stealthy ware of correcting, along with the eruption of tooth, the position department that the ware corresponds is rescued to stealthy is because covering adjacent gum, erupt and not have enough space eruption and influence the normal eruption of tooth, perhaps can appear after the tooth erupts and correct the phenomenon that can't wear in stealthy tooth.

In the prior art, a method of designing eruption space and tooth eruption follow-up is adopted, but the method has certain problems, for example, the comprehensive factors are more in the process of erupting teeth in a patient mouth, and in the process of correcting and planning design, if the eruption space is not designed reasonably, the eruption space and the teeth are likely to be contacted with each other to generate acting force, so that the normal eruption effect of the teeth is influenced; in addition, if the tooth eruption speed and the eruption parameter are predicted inaccurately in the follow-up design process, eruption design errors may occur, and the effect that the patient cannot wear the appliance normally is generated.

The above effects are all undesirable in the process of correction, so that it is of great significance to design a correction system and a design method thereof, wherein the design of eruption space is simple along with the progress of correction plan, and normal growth eruption of teeth is not influenced.

Disclosure of Invention

The invention mainly aims to provide a tooth correcting system, a design method and a preparation method thereof, which are applied to tooth correction in the tooth replacement period of teenagers so that a shell-shaped tooth corrector can simultaneously erupt teeth in the process of correcting tooth deformities.

The invention also provides a method for predicting the eruption cavity of the shell-shaped dental appliance, wherein the predicted inner surface of the eruption cavity and the outer surfaces of one or more teeth which do not grow to eruption preset parameters are arranged in a gap mode, so that the shell-shaped dental appliance erupts simultaneously in the process of correcting the tooth deformity.

The technical scheme of the invention is as follows:

a tooth correcting system comprises at least one shell-shaped tooth correcting device which enables teeth to be gradually adjusted from an initial position to a target correcting position according to a correcting plan and allows teeth to erupt naturally, wherein the shell-shaped tooth correcting device comprises a correcting device body, the correcting device body comprises a geometric structure used for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth, and the correcting device body is further provided with at least one eruption part used for accommodating one or more teeth which do not grow to erupt preset parameters; as the correcting plan is carried out, the eruption part on each shell-shaped tooth corrector is provided with a constant or basically constant column structure, and the inner surface of the eruption part and the outer surface of the tooth which does not grow to erupt to the preset parameters are arranged in a clearance mode; the predetermined eruption parameter includes a tooth parameter after complete eruption of one or more teeth that have not grown or that have not fully grown.

In some embodiments, the predetermined eruption parameters include a size, position, shape, and orientation of the teeth after complete eruption of the one or more non-grown or incompletely grown teeth.

In some embodiments, the constant or substantially constant columnar structure is set based on the size, position, shape, and orientation of the one or more teeth after full eruption that have not grown to erupt at the predetermined parameters.

Specifically, as the plan is rescued, the adjacent teeth of one or more teeth which do not grow to erupt predetermined parameters are rescued and moved, so that the column structure of the erupting part can be properly adjusted in a smooth transition manner, and the erupting part is smoothly connected with the rest shell-shaped bodies. In some embodiments, the dimensions of the pillar structures are: the one or more teeth not grown to 1.02-1.05 times the size of the teeth after full eruption of the teeth that erupt to predetermined parameters; the column structure under the size is slightly larger than the size of the teeth after the teeth are completely erupted, so that the eruption part and one or more teeth which do not grow to erupt preset parameters can be arranged in a clearance mode. The orientation of the column structure is an angle of 0-5 degrees with the orientation of the long axis of the one or more teeth which are not grown to the preset eruption parameter; the offset of each vertex coordinate value in the space three-dimensional coordinate system of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted is 0-1 mm; the offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm. The constant or substantially constant column structure described in this embodiment is within the dimensions, positions, shapes and orientations described above.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

In some embodiments, the constant or substantially constant columnar structure is set based on both a first predetermined parameter of mesial-direction neighboring teeth and a second predetermined parameter of distal-direction neighboring teeth of the one or more teeth that have not grown to erupt a predetermined parameter.

In some embodiments, the first predetermined parameter comprises a value of: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are planar or curved for smooth transition with the labial/buccal surfaces of the mesial-distal adjacent teeth, lingual surfaces that are planar or curved for smooth transition with the lingual surfaces of the mesial-distal adjacent teeth, and occlusal surfaces that are planar or curved for smooth transition with the occlusal surfaces of the mesial-distal adjacent teeth.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

In some embodiments, the constant or substantially constant columnar structure is set based on the third predetermined parameter of the one or more teeth that have not grown to erupt the predetermined parameter and the distal neighboring teeth.

In some embodiments, the third predetermined parameter comprises: a maximum dimension in a buccal-lingual direction of the mesial-direction adjacent tooth, a maximum dimension in a mesial-distal direction, and a maximum dimension in a height in a long axis direction of the mesial-direction tooth.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are flat or smoothly transitioned to labial/buccal surfaces of teeth adjacent thereto in the mesial-distal direction, lingual surfaces that are flat or smoothly transitioned to lingual surfaces of teeth adjacent thereto in the mesial-distal direction, and occlusal surfaces that are flat or smoothly transitioned to occlusal surfaces of teeth adjacent thereto in the mesial-distal direction.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

In some embodiments, the constant or substantially constant columnar structure is a cylindrical structure, an elliptical cylinder, or a polygonal columnar structure having a number of side edges of not less than four.

In some embodiments, the geometry of the shell-shaped dental appliance other than eruption is such that teeth other than unerupted teeth are gradually adjusted from an initial position to a target correction position.

The invention also provides a design method of the tooth correcting system, which comprises the following steps:

s1, acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;

s2, cutting and identifying the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model; identifying and marking data representing teeth that are not erupting or are not completely erupted;

s3, virtual design of the correction plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;

s4, designing a tooth correction system:

the shell-shaped tooth appliance comprises an appliance body, wherein the appliance body comprises a geometric structure for accommodating a plurality of upper jaw teeth or a plurality of lower jaw teeth, and the appliance body is also provided with at least one eruption part for accommodating one or more teeth which do not grow to erupt preset parameters;

with the progress of the correcting plan, the eruption part on each shell-shaped tooth corrector is provided with a constant or basically constant column structure, and the inner surface of the eruption part and the outer surface of the tooth which does not grow to erupt preset parameters are arranged in a clearance mode; the predetermined eruption parameter is designed to include a parameter of the teeth after complete eruption of the one or more teeth that have not grown or that have not grown completely.

In some embodiments of the above method of designing, the parameters of the one or more teeth after full eruption of the teeth not grown to eruption predetermined parameters are designed to include the size, position, shape and orientation of the one or more teeth after full eruption of the non-grown teeth.

In some embodiments of the above-described design method, the constant or substantially constant columnar structure is set based on the size, position, shape, and orientation of the one or more teeth after full eruption that have not grown to eruption predetermined parameters.

In some embodiments of the above design method, the size of the post structure is 1.02 to 1.05 times the size of the one or more teeth that have not grown to a size that is after the teeth erupting the predetermined parameter have fully erupted; the orientation of the column structure is an angle of 0-5 degrees with the long axis of the tooth after the one or more non-grown teeth are completely erupted; the offset of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted in the space three-dimensional coordinate system is 0-1 mm; the offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm.

In some embodiments of the above-described design method, the constant or substantially constant columnar structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter, such that the constant or substantially constant columnar structure does not affect the maxillomandibular occlusal relationship setting.

In the above design method, the constant or substantially constant columnar structure is set based on both the first predetermined parameter of the mesial-direction neighboring tooth and the second predetermined parameter of the distal-direction neighboring tooth of the one or more teeth that have not grown to the predetermined parameter.

In the above design method, the first predetermined parameter includes a value of: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

In the above-mentioned design method, the constant or substantially constant columnar structure is designed to include a labial/buccal surface, a lingual surface and an occlusal surface, wherein the labial/buccal surface is a plane or a curved surface smoothly transitioning with the labial/buccal surface of the tooth adjacent to the labial/buccal surface in the mesial/distal direction, the lingual surface is a plane or a curved surface smoothly transitioning with the lingual surface of the tooth adjacent to the lingual/buccal surface in the mesial/distal direction, and the occlusal surface is a plane or a curved surface smoothly transitioning with the occlusal surface of the tooth adjacent to the mesial/distal direction.

In the above design method, the constant or substantially constant column structure is further based on the size, position, shape and orientation settings of the teeth corresponding to the jaw and the one or more teeth that have not grown to erupt the predetermined parameter, such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

In one embodiment of the above design method, the constant or substantially constant columnar structure is set based on a third predetermined parameter of the one or more teeth that have not grown to eruption of the predetermined parameter in the mesial and mesial neighboring teeth.

In an embodiment of the above design method, the third predetermined parameter includes: a maximum dimension in a buccal-lingual radial direction of the distal-direction adjacent tooth, a maximum dimension in a proximal-distal direction, and a maximum dimension in a tooth long-axis direction height of the proximal-direction adjacent tooth.

In one embodiment of the above design method, the constant or substantially constant cylinder structure is designed to include a labial/buccal surface, a lingual surface and an occlusal surface, wherein the labial/buccal surface is a plane or a curved surface smoothly transitioning from the labial/buccal surface of the tooth adjacent to the labial/buccal surface in the mesial/distal direction, the lingual surface is a plane or a curved surface smoothly transitioning from the lingual surface of the tooth adjacent to the lingual/buccal surface in the mesial/distal direction, and the occlusal surface is a plane or a curved surface smoothly transitioning from the occlusal surface of the tooth adjacent to the lingual/buccal surface in the mesial/distal direction.

In one embodiment of the above design method, the constant or substantially constant column structure is further based on a size, position, shape and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt to the predetermined parameter, such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting.

In an embodiment of the above-described design method, the constant or substantially constant cylindrical structure is designed as a cylindrical structure, an elliptic cylindrical structure, or a polygonal cylindrical structure having a number of side edges of not less than four.

In one embodiment of the above design method, the geometry of the shell-shaped dental appliance other than the eruption portion is designed to gradually adjust the teeth other than the unerupted teeth from the initial position to the target correction position.

The invention also provides a preparation method of the tooth correcting system, which is characterized in that the shell-shaped tooth correcting device in the dental corrector system obtained by the design method is manufactured by adopting hot-pressing film forming or an additive manufacturing process to obtain a series of shell-shaped tooth correcting devices.

The invention also provides a method for predicting the eruption cavity of the shell-shaped dental appliance, which comprises the following steps: at least one shell-shaped tooth appliance which is designed according to the correction plan to enable the teeth to be gradually adjusted from the initial position to the target correction position and can simultaneously perform tooth eruption; one of the shell-shaped dental appliances comprises an appliance body of a geometric structure for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth and at least one eruption cavity for accommodating one or more teeth which do not grow to erupt at a predetermined parameter; the eruption cavity is predicted based on a first preset parameter of a near-middle adjacent tooth and a second preset parameter of a far-middle adjacent tooth of one or more teeth which do not grow to eruption preset parameters, so that the inner surface of the eruption cavity and the outer surfaces of the one or more teeth which do not grow to eruption preset parameters are arranged in a gap mode; the predetermined eruption parameter is designed to include a tooth parameter after complete eruption of the one or more non-grown or incompletely grown teeth.

In the above prediction method, the first predetermined parameter includes, for the mesial adjacent tooth: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

In the above prediction method, the eruption cavity is further set based on the size, position, shape and orientation of the teeth corresponding to the jaw and the one or more teeth that do not grow to erupt predetermined parameters, so that the structure of the eruption cavity does not affect the setting of the occlusal relationship between the upper jaw and the lower jaw.

The invention also provides a method for predicting the eruption cavity of the shell-shaped dental appliance, which comprises the following steps: at least one shell-shaped tooth appliance which is designed according to the correction plan to enable the teeth to be gradually adjusted from the initial position to the target correction position and can simultaneously perform tooth eruption; one of the shell-shaped dental appliances comprises an appliance body of a geometric structure for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth and at least one eruption cavity for accommodating one or more teeth which do not grow to erupt at a predetermined parameter; the eruption cavity is predicted based on a third preset parameter of far-middle-direction adjacent teeth and near-middle-direction adjacent teeth of the one or more teeth which do not grow to eruption preset parameters, so that the inner surface of the eruption cavity and the outer surfaces of the one or more teeth which do not grow to eruption preset parameters are arranged in a gap mode; the predetermined eruption parameter is designed to include a tooth parameter after complete eruption of the one or more non-grown or incompletely grown teeth.

In the above prediction method, the third predetermined parameter includes: a maximum dimension in a buccal-lingual direction of the mesial-direction adjacent tooth, a maximum dimension in a mesial-distal direction, and a maximum dimension in a height in a long axis direction of the mesial-direction tooth.

In the above prediction method, the eruption cavity is further set based on the size, position, shape and orientation of the teeth corresponding to the jaw and the one or more teeth that do not grow to erupt predetermined parameters, so that the structure of the eruption cavity does not affect the setting of the occlusal relationship between the upper jaw and the lower jaw.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a tooth correcting system for invisible tooth correction, which comprises shell-shaped tooth correcting devices, wherein each shell-shaped tooth correcting device comprises a correcting device body, an eruption part is also arranged on each correcting device body, and the eruption part on each shell-shaped tooth correcting device is provided with a constant or basically constant column structure along with the progress of a correcting plan; the shell-shaped tooth appliance has the effect of correcting tooth deformity, the eruption part arranged on the appliance body is used for receiving teeth which do not grow to eruption preset parameters, and the gap between the eruption part and the teeth which do not grow to eruption preset parameters is arranged, so that after the appliance body is worn, a space for tooth growth is reserved above one or more teeth which do not grow to eruption preset parameters, and therefore, each shell-shaped tooth appliance of the whole appliance system does not interfere with the natural growth of the teeth when being worn; in addition, the eruption part with a constant or basically constant column structure enables the design and the use of each appliance and the eruption part to be simpler, the eruption part can be used as a standard accessory, and the standard accessory is selected to be inserted into the dental jaw model when the dental jaw model is used.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

FIG. 1 is a schematic front view of a shell-shaped dental appliance according to example 1 of the present invention;

FIG. 2 is a schematic side view of a shell-shaped dental appliance according to example 1 of the present invention;

FIG. 3 is a schematic front view of another shell-shaped dental appliance according to example 1 of the present invention;

FIG. 4 is a schematic side view of another shell-shaped dental appliance according to example 1 of the present invention;

FIG. 5 is a schematic view showing a structure of a shell-shaped dental appliance according to example 1 of the present invention;

FIG. 6 is a schematic view of a design method of a dental appliance system according to example 2 of the present invention;

FIG. 7 is a schematic front view of a shell-shaped dental appliance according to example 2 of the present invention;

FIG. 8 is a schematic side view of a shell-shaped dental appliance according to example 2 of the present invention;

FIG. 9 is a schematic front view of another shell-shaped dental appliance according to example 2 of the present invention;

FIG. 10 is a schematic side view of another shell-shaped dental appliance according to example 2 of the present invention;

FIG. 11 is a schematic front view of a shell-shaped dental appliance according to example 4 of the present invention;

FIG. 12 is a schematic side view of a shell-shaped dental appliance according to example 4 of the present invention;

FIG. 13 is a schematic front view of a shell-shaped dental appliance according to example 5 of the present invention;

FIG. 14 is a side view of a shell-shaped dental appliance according to example 5 of the present invention.

Reference numerals: a shell-shaped dental appliance (100,200,400,500); a eruption (120,220), an appliance body (110,210,410,510); erupting into the cavity (420, 520).

Detailed Description

In the description of the present invention, it is to be noted that "one or more teeth that do not grow to erupt at a predetermined parameter", that is, "one or more teeth that do not grow or do not completely grow", are also referred to as "erupt teeth", and are also referred to as "erupt teeth".

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise.

The invention will be further illustrated with reference to the following specific examples.

Example 1

The embodiment provides a dental appliance system, which includes at least one shell-shaped dental appliance 100 for gradually adjusting teeth from an initial position to a target correction position according to a correction plan and allowing teeth to erupt naturally, and referring to fig. 1 to 5, the structural schematic diagram of the shell-shaped dental appliance of the embodiment is shown, the shell-shaped dental appliance includes an appliance body 110, the appliance body 110 includes a geometric structure for accommodating a plurality of maxillary teeth or mandibular teeth, and the appliance body 110 is further provided with at least one eruption part 120 for accommodating one or more teeth which do not grow to erupt predetermined parameters; as the plan is being developed, the eruption part 120 of each shell-shaped dental appliance 100 has a constant or substantially constant column structure, and the inner surface of the eruption part 120 is spaced from the outer surface of the teeth that have not erupted to the predetermined parameter; the predetermined eruption parameter includes a parameter of one or more teeth after complete eruption of non-growing or incompletely growing teeth.

The embodiment provides a tooth correcting system for invisible tooth correction, which is suitable for tooth correction of teenagers in the dental replacement period. Because the planned cycle is rescued to the tooth, half a year or even longer rescue cycle, be in the patient of replacing the tooth phase, need consider when carrying out the tooth and rectify the influence of sprouting tooth to the plan of rescuring, the space that the design is used for holding sprouting teeth has ensured that sprouting teeth can not receive the power that produces with shell shape unscrambler interact when carrying out the design of dentistry orthotic systems, and the influence sprouts. Otherwise the shell for correction will cover over the gum at the eruption and will inhibit the growth of the eruption.

Specifically, the shell-shaped orthodontic appliance 100 (also referred to as orthodontic appliance) of the embodiment has the effect of correcting the malformation of teeth, and the eruption part 120 arranged on the appliance body 110 is used for receiving teeth which do not grow to eruption predetermined parameters, and the gap between the inner surface of the eruption part 120 and the teeth which do not grow to eruption predetermined parameters is set so that the appliance body 110 can reserve a space for teeth to grow above one or more teeth which do not grow to eruption predetermined parameters after being worn, so that the shell-shaped orthodontic appliance 100 cannot interfere with the natural growth of the teeth when being worn. The tooth correcting system of the embodiment is suitable for correcting plans with a plurality of correcting stages, and the eruption part 120 of each correcting device body 110 has a constant or basically constant column structure along with the progress of the correcting plans, so that the teeth which do not grow to erupt preset parameters in the whole tooth correcting system can not be touched by each correcting device body 110 all the time. In addition, the structure of the eruption part 120 makes the design and use of each appliance and the eruption part 120 simpler, and the eruption part 120 can be used as a standard accessory, and the standard accessory is selected to be inserted into the dental jaw model when in use.

In some embodiments, the predetermined eruption parameters include a size, position, shape, and orientation of the teeth after complete eruption of the one or more non-grown or incompletely grown teeth. Wherein the size, position, shape and orientation may be the size, position, shape and orientation of an under-grown tooth obtained based on patient CBCT, or the size, position, shape and orientation of the under-grown or under-grown tooth obtained based on one or more denture libraries, or the size, position, shape and orientation of the under-grown or under-grown tooth based on big data statistics.

In some embodiments, the constant or substantially constant columnar structure is set based on the size, position, shape, and orientation of the one or more teeth after full eruption that have not grown to erupt at the predetermined parameters.

Specifically, as the orthodontic plan is performed, the adjacent teeth of one or more teeth which do not grow to erupt at the predetermined parameters are orthodontic and moved, so that the column structure of the eruption part 120 is properly adjusted in a smooth transition manner, so that the eruption part 120 is smoothly connected with the rest of the shell-shaped bodies.

In some embodiments, the post structure has a size that is 1.02-1.05 times the size of the one or more teeth that have not grown to a size that is after the teeth erupting to the predetermined parameters are fully erupted; more specifically, the column structure designed based on the dimension of the teeth after complete eruption is a fixed dimension and does not change, so that the column structure is enlarged by 1.02-1.05 times based on the fixed dimension, and is larger than the dimension of one or more teeth which do not grow to eruption preset parameters after complete eruption, so that the one or more teeth which do not grow to eruption preset parameters are ensured to be always kept away from the inner surface of the eruption part 120 (eruption cavity) during eruption.

The orientation of the column structure is an angle of 0-5 degrees with the long axis orientation of the one or more teeth which are not grown to the preset eruption parameter and are completely erupted; more specifically, based on the orientation of one or more teeth that have not grown to a predetermined parameter of eruption after complete eruption, the orientation is a determined orientation, and therefore the orientation of the column structure designed based on the determined orientation has a larger angular range of orientation than the orientation of one or more teeth that have not grown to a predetermined parameter of eruption after complete eruption, i.e., the angular orientation is enlarged by 0-5 ° with reference to the long axis of the unerupted or incompletely erupted teeth, ensuring that the unerupted or incompletely erupted teeth are always kept out of contact with the eruption part 120 (eruption cavity) formed during eruption.

The offset of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted in the space three-dimensional coordinate system is 0-1 mm; more specifically, based on the position of the eruption tooth after it is completely erupted, which is a determined position, the positions of the vertexes of the pillar structure are shifted outward from the inside of the eruption part 120 based on the determined position, respectively. It should be noted that, when designing the dental correcting system, the dental correcting system is based on a digitized dental model, the digitized dental model is composed of a plurality of triangular surface patches in a unified three-dimensional coordinate system, each vertex in each triangular surface patch has a corresponding spatial coordinate value in the three-dimensional coordinate system, and the position determination of one or more teeth which do not grow to the preset eruption parameter after complete eruption is based on the spatial coordinate values of each vertex which constitutes the triangular surface patch, that is, the expansion of 0-1mm offset is performed with each vertex of the eruption teeth as a reference, so as to ensure that the eruption teeth are always kept out of contact with the eruption part 120 (eruption cavity) formed in the eruption process.

The offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm. More specifically, the shape after the teeth are completely erupted based on the above-mentioned non-growth to eruption predetermined parameter is a definite shape, and therefore the determination of the shape of the columnar structure is performed based on the above-mentioned definite shape. In designing the dental correction system, the design is performed based on a digitized dental model, and the digitized dental model is composed of a plurality of triangular surface patches in a unified three-dimensional coordinate system, and each vertex in each triangular surface patch has a corresponding spatial coordinate value in the three-dimensional coordinate system. The shape of the teeth which do not grow to the preset eruption parameter after complete eruption is based on the space coordinate value of each vertex forming the teeth, the shape of the cylinder structure is larger than the shape offset range of the teeth which do not grow to the preset eruption parameter after complete eruption, namely, the offset of each vertex forming the teeth which do not erupt or incompletely erupt is used as a reference to be expanded by 0-1mm, and the eruption part 120 (eruption cavity) can be in smooth transition with the adjacent geometrical structure and is always kept out of contact with the eruption teeth in the eruption process. The constant or substantially constant column structure described in this embodiment is within the dimensions, positions, shapes and orientations described above.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. Wherein, the teeth corresponding to the jaw refer to teeth which are occluded with the one or more teeth which are not grown to erupt to the preset parameters, and the occlusal surface of the column structure which is constant or basically constant can be designed through the teeth corresponding to the jaw. The occlusal surface of invariable or basically invariable cylinder structure can be designed into plane, curved surface or with carry out the structure that unsmooth matches to jaw tooth, according to the occlusal surface to jaw tooth design eruption portion 120, can make eruption portion 120 with carry out the fossa matching to jaw tooth, or make the occlusal surface of this eruption portion 120 with carry out the unsmooth matching of occlusal surface to jaw tooth.

In some embodiments, the constant or substantially constant columnar structure is set based on both a first predetermined parameter of mesial-direction neighboring teeth and a second predetermined parameter of distal-direction neighboring teeth of the one or more teeth that have not grown to erupt a predetermined parameter.

In some embodiments, the first predetermined parameter comprises a distance between a mesial adjacent tooth: maximum size L in buccal and lingual radial directions₁Maximum dimension in the mesial-distal direction D₁And the maximum dimension H of the height of the tooth in the long axis direction₁. The second predetermined parameters include, for the far direction neighboring tooth: maximum size L in buccal and lingual radial directions₂Maximum dimension in the mesial-distal direction D₂And the maximum dimension H of the height of the tooth in the long axis direction₂. In one embodiment, as shown in fig. 1 and 2, the eruption part 120 of the shell-shaped dental appliance 100 is used for coating the second premolar to erupt, and the first predetermined parameter is the maximum size L of the first premolar in the buccal-lingual radial direction₁Maximum dimension in the mesial-distal direction D₁And the maximum dimension H of the height of the tooth in the long axis direction₁(ii) a The second predetermined parameter is the maximum dimension L in the lingual radial direction of the first molar teeth₂Maximum dimension in the mesial-distal direction D₂And the maximum dimension H of the height of the tooth in the long axis direction₂. While the determination of a constant or substantially constant column structure based on the first predetermined parameter and the second predetermined parameter may be performed by L₁And L₂The constant or basically constant column body structure cheek-tongue diameter direction is carried out in an arithmetic mean, weighted average and equal modeDetermining the size of the target; by D₁And D₂The sizes of the column structures in the near-far direction and the far-far direction are determined in a constant or basically constant mode in an arithmetic mean mode and a weighted mean mode; by H₁And H₂The determination of the dimension of the tooth with the column structure in the long axis direction is constant or basically constant in an arithmetic mean, weighted average and other modes. To achieve maximum conformity of eruption 120 throughout the plan to the size and shape of the one or more teeth that have not grown to erupt at the predetermined parameters.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are flat or smoothly transitioned to labial/buccal surfaces of teeth adjacent thereto in the mesial-distal direction, lingual surfaces that are flat or smoothly transitioned to lingual surfaces of teeth adjacent thereto in the mesial-distal direction, and occlusal surfaces that are flat or smoothly transitioned to occlusal surfaces of teeth adjacent thereto in the mesial-distal direction. Due to the arrangement structure, the shell-shaped tooth appliance 100 has a smooth shell structure for wrapping teeth, and the foreign body sensation in the mouth of a patient is small when the patient wears the shell-shaped tooth appliance. It should be noted that a constant or substantially constant columnar structure means that the shape, size, location and orientation of the eruptions 120 are consistent, and since teeth may move as the appliance progresses during the wearing and correction of a series of shell-shaped appliances, the eruptions 120 may have a partial spatial adaptation due to a smooth transitional connection with the geometry of the adjacent teeth. Of course, in some embodiments, the constant or substantially constant columnar structure may also include only labial/buccal and lingual sides, and no occlusal surface.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. The occlusal surface of the eruption portion 120 of this embodiment can be designed as plane, curved surface or with carry out the structure that unsmooth matches to jaw teeth, according to the occlusal surface to jaw teeth design eruption portion 120, can make eruption portion 120 with carry out the fossa matching to jaw teeth, or make the occlusal surface of this eruption portion 120 with carry out the unsmooth matching of occlusal surface to jaw teeth.

In some embodiments, the constant or substantially constant columnar structure is set based on a third predetermined parameter of the one or more teeth that have not grown to erupt at the predetermined parameter.

In some embodiments, the third predetermined parameter comprises: the maximum size of the buccal-lingual radial direction, the maximum size of the near-far direction and the maximum size of the long-axis direction of the near-middle direction adjacent teeth are arranged in the far-middle direction. In some embodiments, as shown in fig. 3 and 4, the eruption part 120 of the shell-shaped dental appliance erupts over the second premolar, and the third predetermined parameter is the maximum size L of the first molar in the buccal-lingual direction₃Maximum dimension in the mesial-distal direction D₃And the maximum dimension H of the height of the neighboring tooth in the direction of the long axis in the mesial direction₃To determine the maximum size L of the second premolar eruption part 120 in the bucco-lingual radial direction₃', maximum dimension in the mesial-distal direction D₃' and maximum dimension H of the height of the neighboring tooth in the direction of the long axis in the mesial direction₃'. The column structure is designed based on the maximum size of the buccal and lingual diameter direction of the far and middle adjacent teeth, the maximum size of the near and far adjacent teeth and the maximum size of the long axis direction of the near and middle adjacent teeth, is enough to accommodate the one or more teeth which do not grow to erupt preset parameters, and the size of the designed column structure is slightly larger than the one or more teeth which do not grow to erupt preset parameters, so that the gap between the column structure and the erupt teeth can be ensured.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are planar or smoothly transitioned to the labial/buccal surfaces of the proximal and distal neighboring teeth, lingual surfaces that are planar or smoothly transitioned to the lingual surfaces of the proximal and distal neighboring teeth, and occlusal surfaces that are planar or smoothly transitioned to the occlusal surfaces of the proximal and distal neighboring teeth. Due to the arrangement structure, the shell-shaped tooth appliance 100 worn by the patient has a smoother shell structure wrapping the teeth, and the foreign body sensation in the mouth of the patient is small when the patient wears the shell-shaped tooth appliance.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. The occlusal surface of the eruption portion 120 of this embodiment can be designed as plane, curved surface or with carry out the structure that unsmooth matches to jaw teeth, according to the occlusal surface to jaw teeth design eruption portion 120, can make eruption portion 120 with carry out the fossa matching to jaw teeth, or make the occlusal surface of this eruption portion 120 with carry out the unsmooth matching of occlusal surface to jaw teeth.

In some embodiments, the constant or substantially constant cylindrical structure is a cylindrical structure, an elliptical cylinder or a polygonal prism structure with the number of side edges not less than four, and the constant or substantially constant cylindrical structure can be set according to the number and types of eruption teeth, and can also be adaptively selected according to the eruption gaps existing between adjacent teeth.

In some embodiments, the geometry of the shell appliance 100 other than the eruption 120 gradually adjusts the teeth other than the unerupted teeth from the initial position to the target appliance position. That is, the eruption part 120 in this embodiment only reserves a growing space for the one or more teeth that do not grow to eruption predetermined parameters, so that the shell-shaped orthodontic appliance 100 does not interfere with the natural growth of the eruption teeth as a whole, but the eruption part 120 in this embodiment does not have an orthodontic effect on the eruption teeth that grow in a malformation manner. That is, if the one or more teeth that do not grow to the eruption predetermined parameter are teeth with malformed growth, the eruption part 120 of the present embodiment is also set according to the eruption teeth without performing corrective intervention on the eruption teeth. And the geometry structure except the eruption part 120 on the shell-shaped dental appliance 100 gradually adjusts the teeth except the unerupted teeth from the initial position to the target correction position, namely, the geometry structure except the eruption part 120 has the correction effect on the rest teeth except the eruption teeth, so that the eruption of the eruption is not interfered when the teeth are aligned.

Example 2

The present embodiment provides a design method of a dental correction system, as shown in fig. 6, which is a schematic diagram of the design method of the present embodiment, where the dental correction system is any one of the dental correction systems described in embodiment 1, and the design method includes the following steps:

s1, acquiring a digital dental model: acquiring a digital dental model, wherein the digital dental model comprises a digital tooth model and a digital gum model;

s2, cutting and identifying the digital dental model: dividing the digital dental model into an independent digital gum model and a single digital dental crown model; identifying and marking data representing teeth that are not erupting or are not completely erupted;

s3, virtual design of the correction plan: virtually designing the single digital dental crown model to enable the single digital dental crown model to gradually change from an initial position to a target correcting position to obtain a series of intermediate digital dental models;

s4, designing a tooth correction system:

the shell-shaped dental appliance 200 is designed according to a correction plan, so that teeth are gradually adjusted from an initial position to a target correction position, and teeth eruption can be simultaneously performed, the shell-shaped dental appliance 200 comprises an appliance body 210, the appliance body 210 comprises a geometric structure for accommodating a plurality of maxillary teeth or a plurality of mandibular teeth, and the appliance body 210 is further provided with at least one eruption part 220 for accommodating one or more teeth which do not grow to erupt preset parameters;

as the plan is being made, the eruption portion 220 of each shell-shaped dental appliance 200 has a constant or substantially constant column structure, and the inner surface of the eruption portion 220 is spaced from the outer surface of the teeth that do not erupt to predetermined parameters.

Specifically, in the design method described in this embodiment,

the digital upper jaw dental model and the digital lower jaw dental model in the step S1 can be obtained by any one of the following methods: obtaining a digital model representing an original tooth layout by means of tomographic X-ray scanning (CAT scanning), digital tomographic X-ray scanning (CT), cone-beam CT scanning (CBCT), Magnetic Resonance Imaging (MRI), intraoral optical scanning, and the like; alternatively, a plaster cast of the patient's teeth may be made by conventional means and scanned by a scanning device, such as a laser scanning device, a CT scanning device, to obtain a digital model representing the original tooth layout.

The cutting of the digitized dental model in step S2 can take the following non-limiting examples:

s200: selecting a first class of characteristic points on a digital dental model to be segmented, wherein the digital dental model is a triangular patch model.

S201: and classifying the second class of feature points in the digital dental model according to the first class of feature points, and determining the tooth to which each second class of feature point belongs.

S202: respectively merging the second type of characteristic points belonging to each tooth to obtain a digital tooth area of each single tooth after the digital tooth jaw model is segmented;

the first type of characteristic points are triangular patch vertexes which are selected based on the digital dental model and used for guiding the segmentation of each single tooth in the dental jaw, and the second type of characteristic points are triangular patch vertexes which are selected based on the digital dental model and used for representing the overall shape of the digital dental model; that is, the first type of feature points are used to guide the segmentation of the dental jaw, and the second type of feature points are feature points when the dental jaw is specifically segmented; through the segmentation guidance of the first class of feature points, the second class of feature points can be accurately classified to each tooth, and further the segmentation precision of the dental jaw is improved.

The first class of feature points are selected on the whole digital dental model, then the second class of feature points on the digital dental model are classified and collected according to the first class of feature points, and the segmentation of the single tooth is realized.

Further, the identification and marking of teeth for the cut tooth model in step S2, and the specific embodiment of identifying and marking data indicating that teeth do not grow to erupt at the predetermined parameter may be to identify teeth positions first, compare the identified teeth with the volume of standard teeth, and mark teeth that do not grow to erupt at the predetermined parameter when the identified teeth volume is smaller than the corresponding standard teeth volume within a certain threshold, for example, half of the standard teeth volume.

More specifically, the method of tooth position identification may employ the following method: step 1: establishing a first prior model, a second prior model and a third prior model; the first prior model comprises the steps of collecting the distance between every two adjacent teeth in the existing tooth model and the number of missing teeth corresponding to the distance, and calculating probability distribution function values for the distances of different numbers of missing teeth; the second prior model comprises the steps of collecting the characteristic quantity of the characteristic position of each tooth in the existing tooth model, and calculating a probability distribution function value for the characteristic quantity of at least the characteristic position of the teeth with the same number; the third prior model comprises the steps of collecting the tooth position arrangement conditions of every two adjacent teeth after the teeth are not lost or different numbers of teeth are lost in the existing tooth model, and calculating the probability distribution function value of the tooth position arrangement conditions; step 2: acquiring characteristic quantity of the characteristic position of each tooth of the tooth model to be tested and the distance between two adjacent teeth; and step 3: and determining the tooth positions of the tooth model to be tested based on the hidden Markov model. And identifying the tooth position according to the method, comparing the tooth volume according to the tooth position mark and a standard tooth model, if the change of the characteristic point coordinate value is within a certain threshold value range, and judging whether the mark is a tooth which does not grow to erupt preset parameters.

In step S3, virtually designing the single digital dental crown model so that the single digital dental crown model gradually changes from an initial position to a target correction position to obtain a series of intermediate digital dental models; the initial position can be the original layout of the teeth before orthodontic correction, or any stage in the correction process, and the target correction position can be any stage after orthodontic correction, and can be the later stage or the later stages of the original layout of the teeth; the target correcting position can be a position for finally correcting the effect according to the patient appeal and the oral condition by doctors and medical designers, can also be recommended according to the oral digital design software and the target correcting position according to similar cases, and can also be adjusted more specifically for the treatment of patients according to the recommendation result.

In step S4, the design of the dental appliance system,

the shell-shaped dental appliance 200 is designed according to the orthodontic plan so that teeth can be gradually adjusted from initial positions to target orthodontic positions and teeth eruption can be performed simultaneously, and the shell-shaped dental appliance 200 can be used for any orthodontic stage in the orthodontic plan, such as an initial stage of orthodontic treatment or a final stage of orthodontic treatment. The eruption part 220 with a constant or basically constant column structure can be set as a standard attachment, so that a clinician or other users can conveniently directly select the standard attachment to insert into the dental jaw model when designing the shell-shaped dental appliance 200, and the use is convenient.

In some embodiments, the constant or substantially constant columnar structure is set based on the size, position, shape, and orientation of the one or more teeth after full eruption that have not grown to erupt at the predetermined parameters.

Specifically, as the orthodontic plan is performed, the adjacent teeth of one or more teeth which do not grow to erupt at the predetermined parameters are orthodontic and moved, so that the column structure of the eruption part 220 is properly adjusted in a smooth transition manner, so that the eruption part 220 is smoothly connected with the rest of the shell-shaped bodies. In some embodiments, the post structure has a size that is 1.02-1.05 times the size of the one or more teeth that have not grown to a size that is after the teeth erupting to the predetermined parameters are fully erupted; more specifically, based on the above-mentioned size of the teeth after fully erupting which do not grow to eruption predetermined parameters, the size is a fixed size and does not change, so that the column structure designed based on the above-mentioned fixed size is larger than the size of the teeth after fully erupting which do not grow to eruption predetermined parameters, thereby ensuring that the teeth which do not erupt or not erupt completely are always kept out of contact with the eruption cavity formed during eruption.

The orientation of the column structure is an angle of 0-5 degrees with the long axis orientation of the one or more teeth which are not grown to the preset eruption parameter and are completely erupted; more specifically, based on the orientation of one or more teeth not growing to the predetermined parameter of eruption after complete eruption, the orientation is determined as a determined orientation, so that the determination of the orientation of the column structure is performed based on the determined orientation, the orientation is wider than the range of the orientation angle of the teeth not growing to the predetermined parameter of eruption after complete eruption, that is, the extension of the 0-5 ° angle orientation is performed based on the long axis of the teeth not growing to the predetermined parameter of eruption, so that the teeth not erupting or incompletely erupting are ensured to be kept not in contact with the eruption part 220 (eruption cavity) formed in the eruption process all the time.

The offset of the position of the column structure and the position of one or more teeth which do not grow to the preset eruption parameter and are completely erupted in the space three-dimensional coordinate system is 0-1 mm; more specifically, based on the position before the eruption is fully erupted until the eruption predetermined parameter is completely erupted, the positions of the vertexes of the determined position cylindrical structure are shifted outwards from the inside of the eruption part 120 based on the determined positions. It should be noted that, when designing the dental correcting system, the dental correcting system is based on a digitized dental model, the digitized dental model is composed of a plurality of triangular surface patches in a unified three-dimensional coordinate system, each vertex in each triangular surface patch has a corresponding spatial coordinate value in the three-dimensional coordinate system, and the position determination of one or more teeth which do not grow to the preset eruption parameter after complete eruption is based on the spatial coordinate values of each vertex which constitutes the triangular surface patch, that is, the expansion of 0-1mm offset is performed by taking each vertex of an eruption tooth as a reference, so as to ensure that the eruption tooth is always kept out of contact with the eruption part 120 (eruption cavity) formed in the eruption process.

The offset of the shape of the cylinder structure and the shape of one or more teeth which do not grow to the preset eruption parameter and completely erupt in the space three-dimensional coordinate system is 0-1 mm. More specifically, the shape after the teeth are completely erupted based on the above-mentioned non-growth to eruption predetermined parameter is a definite shape, and therefore the determination of the shape of the columnar structure is performed based on the above-mentioned definite shape. In the design of the dental correction system, the design is performed based on a digitized dental model, the digital dental model is composed of a plurality of triangular surface patches under a uniform three-dimensional coordinate system, each vertex in each triangular surface patch has a corresponding space coordinate value in the three-dimensional coordinate system, the shape after complete eruption of the tooth which has not grown to eruption predetermined parameters is based on the spatial coordinate values of each vertex constituting it, while the shape of the post structure is more widely offset than the shape after full eruption of a tooth that has not grown to eruption predetermined parameters, namely, the offset of 0-1mm is enlarged by taking each peak of the composition of the teeth which are not erupted or incompletely erupted as a reference, and the eruption part 120 (erupted cavity) can be smoothly transited with the adjacent geometric structure and is always kept not in contact with the erupted teeth in the eruption process. The constant or substantially constant column structure described in this embodiment is within the dimensions, positions, shapes and orientations described above.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. Wherein, the teeth corresponding to the jaw refer to teeth which are occluded with the one or more teeth which are not grown to erupt to the preset parameters, and the occlusal surface of the column structure which is constant or basically constant can be designed through the teeth corresponding to the jaw. The occlusal surface of invariable or basically invariable cylinder structure can be designed into plane, curved surface or with carry out the structure that unsmooth matches to jaw tooth, according to the occlusal surface to jaw tooth design eruption portion 220, can make eruption portion 220 with carry out the cusp nest to jaw tooth and match, or make the occlusal surface of this eruption portion 220 with carry out the unsmooth matching of occlusal surface to jaw tooth.

In some embodiments, the constant or substantially constant columnar structure is set based on both a first predetermined parameter of mesial-direction neighboring teeth and a second predetermined parameter of distal-direction neighboring teeth of the one or more teeth that have not grown to erupt a predetermined parameter.

In some embodiments, the first predetermined parameter comprises a distance between a mesial adjacent tooth: maximum size L in buccal and lingual radial directions₁Maximum dimension in the mesial-distal direction D₁And the maximum dimension H of the height of the tooth in the long axis direction₁. The second predetermined parameters include, for the far direction neighboring tooth: maximum size L in buccal and lingual radial directions₂Maximum dimension in the mesial-distal direction D₂And the maximum dimension H of the height of the tooth in the long axis direction₂. In one embodiment, as shown in fig. 7 and 8, the eruption part 220 of the shell-shaped dental appliance 200 is used for coating the second premolar to erupt, and the first predetermined parameter includes the maximum size of the first premolar in the buccal-lingual radial direction, the maximum size of the first premolar in the mesial-distal direction and the maximum size of the tooth in the height of the first tooth in the long axis direction; the second predetermined parameter is a maximum dimension in a lingual direction of the first molar teeth, a maximum dimension in a mesial-distal direction, and a maximum dimension in a height in a long axis direction of the teeth. While the method of determining a constant or substantially constant pillar structure based on a first predetermined parameter and a second predetermined parameter may be performed by L₁And L₂The sizes of the constant or basically constant column structure in the buccal and lingual diameter direction are determined in the modes of arithmetic mean and weighted mean; by D₁And D₂The sizes of the column structures in the near-far direction and the far-far direction are determined in a constant or basically constant mode in an arithmetic mean mode and a weighted mean mode; by H₁And H₂The determination of the dimension of the tooth with the column structure in the long axis direction is constant or basically constant in an arithmetic mean, weighted average and other modes. To achieve maximum engagement of the eruption 220 with the one or more eruptions throughout the planThe particles do not grow to the size and shape of the teeth that erupt at the predetermined parameters.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are flat or smoothly transitioned to labial/buccal surfaces of teeth adjacent thereto in the mesial-distal direction, lingual surfaces that are flat or smoothly transitioned to lingual surfaces of teeth adjacent thereto in the mesial-distal direction, and occlusal surfaces that are flat or smoothly transitioned to occlusal surfaces of teeth adjacent thereto in the mesial-distal direction. Due to the arrangement structure, the shell-shaped tooth appliance 200 worn by the patient has a smoother shell structure wrapping the teeth, and the foreign body sensation in the mouth of the patient is small when the patient wears the shell-shaped tooth appliance. It should be noted that a constant or substantially constant cylindrical structure means that the main body shape, size, position and orientation of the eruption portion 220 are consistent, and as a series of shell-shaped appliances are worn and corrected, teeth can move along with the correction, and the eruption portion 220 and the adjacent tooth cavity are in smooth transition connection to have partial spatial adaptation. In some embodiments, the constant or substantially constant columnar structure may also include only labial/buccal and lingual sides, and no occlusal surface.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. The occlusal surface of the eruption portion 220 of this embodiment can be designed for plane, curved surface or with carry out the structure that unsmooth matches to jaw tooth, according to the occlusal surface to jaw tooth design eruption portion 220, can make eruption portion 220 with carry out the cusp nest to jaw tooth and match, or make the occlusal surface of this eruption portion 220 with carry out the unsmooth matching of occlusal surface to jaw tooth.

In some embodiments, the constant or substantially constant columnar structure is set based on a third predetermined parameter of the one or more teeth that have not grown to erupt at the predetermined parameter.

In some embodiments, the third pre-stageThe fixed parameters comprise: the maximum size of the buccal-lingual radial direction, the maximum size of the near-far direction and the maximum size of the long-axis direction of the near-middle direction adjacent teeth are arranged in the far-middle direction. In some embodiments, as shown in fig. 9 and 10, the eruption part 220 of the orthodontic appliance is used for erupting the second premolar, and the third predetermined parameter is the maximum size L of the first molar in the buccal-lingual diameter direction₃Maximum dimension in the mesial-distal direction D₃And the maximum dimension H of the height of the adjacent tooth in the direction of the long axis in the mesial direction₃To determine the maximum size L of the second premolar eruption part 220 in the bucco-lingual radial direction₃', maximum dimension in the mesial-distal direction D₃' and maximum dimension H of the height of the neighboring tooth in the direction of the long axis in the mesial direction₃'. Therefore, the column structure designed based on the maximum size of the bucco-lingual diameter direction of the far-middle adjacent tooth, the maximum size of the near-far-middle adjacent tooth and the maximum size of the long axis direction height of the near-middle adjacent tooth is enough to receive the one or more teeth which are not grown to the predetermined parameter of eruption, and the size of the designed column structure is slightly larger than the one or more teeth which are not grown to the predetermined parameter of eruption, so as to ensure that the column structure and the erupting tooth can be arranged in a clearance way.

In some embodiments, the constant or substantially constant columnar structure comprises labial/buccal surfaces that are planar or curved in smooth transition with the labial/buccal surfaces of the proximal and distal neighboring teeth thereof, lingual surfaces that are planar or curved in smooth transition with the lingual surfaces of the proximal and distal neighboring teeth thereof, and an occlusal surface that is planar or curved in smooth transition with the occlusal surfaces of the proximal and distal neighboring teeth thereof. Due to the arrangement structure, the shell-shaped tooth appliance 200 worn by the patient has a smoother shell structure wrapping the teeth, and the foreign body sensation in the mouth of the patient is small when the patient wears the shell-shaped tooth appliance.

In some embodiments, the constant or substantially constant column structure is further based on a size, position, shape, and orientation setting of teeth of the jaw corresponding to the one or more teeth that have not grown to erupt the predetermined parameter such that the constant or substantially constant column structure does not affect the maxillomandibular occlusal relationship setting. The occlusal surface of the eruption portion 220 of this embodiment can be designed for plane, curved surface or with carry out the structure that unsmooth matches to jaw tooth, according to the occlusal surface to jaw tooth design eruption portion 220, can make eruption portion 220 with carry out the cusp nest to jaw tooth and match, or make the occlusal surface of this eruption portion 220 with carry out the unsmooth matching of occlusal surface to jaw tooth.

In some embodiments, the constant or substantially constant cylindrical structure is a cylindrical structure, an elliptical cylinder or a polygonal prism structure with the number of side edges not less than four, and the constant or substantially constant cylindrical structure can be set according to the number and types of eruption teeth, and can also be adaptively selected according to the eruption gaps existing between adjacent teeth.

In some embodiments, the geometry of the shell appliance 200 other than the eruption 220 gradually adjusts the teeth other than the unerupted teeth from the initial position to the target appliance position. That is, the eruption part 220 in this embodiment only reserves a growing space for the one or more teeth which do not grow to erupt predetermined parameters, so that the shell-shaped orthodontic appliance 200 does not interfere with the natural growth of the eruption teeth as a whole, but the eruption part 220 of this embodiment does not have an orthodontic effect on the eruption teeth growing in a malformation manner. That is, if the one or more teeth that do not grow to the eruption predetermined parameter are teeth with malformed growth, the eruption part 220 of the present embodiment is also configured according to the eruption teeth without performing corrective intervention on the eruption teeth. And the geometry structure except the eruption part 120 on the shell-shaped dental appliance 100 gradually adjusts the teeth except the unerupted teeth from the initial position to the target correction position, namely, the geometry structure except the eruption part 120 has the correction effect on the rest teeth except the eruption teeth, so that the eruption of the eruption is not interfered when the teeth are aligned.

Example 3

The embodiment also provides a preparation method of the tooth correcting system, and the shell-shaped tooth correcting devices in the dental appliance system obtained by the design method in any embodiment 2 are manufactured by adopting hot-pressing film forming or an additive manufacturing process to obtain a series of shell-shaped tooth correcting devices.

For example, when the hot-pressing film forming process is adopted for manufacturing, a specific manufacturing method comprises the following steps: 3D printing is carried out on the basis of the digital dental model and a series of intermediate digital dental models, a solid dental model is manufactured, then shell-shaped dental appliances containing teeth are obtained on the solid dental model in a hot press molding mode, and then the shell-shaped dental appliances containing teeth are obtained by cutting along a gum line or a position close to the gum line on the shell-shaped dental appliances containing teeth.

For example, when the shell-shaped dental appliance is manufactured by an additive manufacturing process, a specific manufacturing process is to print and manufacture the designed shell-shaped dental appliance digital model by a 3D printing method.

Example 4

A prediction method of eruption cavities of shell-shaped dental appliances comprises the steps of designing at least one shell-shaped dental appliance 400 which enables teeth to be gradually adjusted from an initial position to a target correction position and can erupt simultaneously according to a correction plan; one of the shell-shaped dental appliances 400 includes an appliance body 410 that accommodates the geometry of the maxillary or mandibular plurality of teeth and at least one eruption cavity 420 that accommodates one or more teeth that have not grown to erupt at predetermined parameters; the eruption cavity 420 predicts the eruption cavity 420 based on the first predetermined parameter of the proximal adjacent tooth and the second predetermined parameter of the distal adjacent tooth of the one or more teeth which do not grow to the eruption predetermined parameter, so that the inner surface of the eruption cavity 420 and the outer surface of the teeth which do not grow to the eruption predetermined parameter are arranged in a gap; the predetermined eruption parameter is designed to include a tooth parameter after complete eruption of the one or more non-grown or incompletely grown teeth.

In some embodiments, the predetermined eruption parameters include a size, position, shape, and orientation of the teeth after complete eruption of the one or more non-grown or incompletely grown teeth. Wherein the size, position, shape and orientation may be the size, position, shape and orientation of an under-grown tooth obtained based on patient CBCT, or the size, position, shape and orientation of the under-grown or under-grown tooth obtained based on one or more denture libraries, or the size, position, shape and orientation of the under-grown or under-grown tooth based on big data statistics.

In some embodiments, the first predetermined parameter comprises a value of: a maximum size in a buccal lingual diameter direction, a maximum size in a mesial-distal direction, and a maximum size in a tooth long axis direction height; the second predetermined parameters include, for the far direction neighboring tooth: the maximum size in the buccal lingual radial direction, the maximum size in the mesial-distal direction, and the maximum size of the tooth's height in the long axis direction.

In some embodiments, the first predetermined parameter comprises a distance between a mesial adjacent tooth: maximum size L in buccal and lingual radial directions₁Maximum dimension in the mesial-distal direction D₁And the maximum dimension H of the height of the tooth in the long axis direction₁. The second predetermined parameters include, for the far direction neighboring tooth: maximum size L in buccal and lingual radial directions₂Maximum dimension in the mesial-distal direction D₂And the maximum dimension H of the height of the tooth in the long axis direction₂. In one embodiment, as shown in fig. 11 and 12, the eruption cavity 420 formed in the shell-shaped dental appliance 400 is used for coating the eruption of the second premolar, and the first predetermined parameter includes the maximum size of the first premolar in the bucco-lingual radial direction, the maximum size of the first premolar in the mesial-distal direction, and the maximum size of the tooth in the long-axis direction; the second predetermined parameter is a maximum dimension in a lingual direction of the first molar teeth, a maximum dimension in a mesial-distal direction, and a maximum dimension in a height in a long axis direction of the teeth. The method for determining the emitting cavity 420 based on the first predetermined parameter and the second predetermined parameter can be determined by L₁And L₂The size of the eruption cavity 420 in the buccal and lingual radial direction is determined in the mode of arithmetic mean and weighted mean; by D₁And D₂The sizes of the eruption cavity 420 in the near-far direction are determined in the mode of arithmetic mean and weighted mean; by H₁And H₂The determination of the tooth size in the longitudinal direction of the erupting cavity 420 is performed by arithmetic mean, weighted average, and the like. To achieve maximum engagement of the eruption cavity 420 with the one or more uncooked areas throughout the planThe size and shape of the teeth up to eruption of predetermined parameters.

In some embodiments, the eruption cavity 420 includes a labial/buccal surface, a lingual surface and an occlusal surface, wherein the labial/buccal surface is a plane or a curved surface smoothly transitioning with the labial/buccal surface of the proximal and distal neighboring teeth, the lingual surface is a plane or a curved surface smoothly transitioning with the lingual surface of the proximal and distal neighboring teeth, and the occlusal surface is a plane or a curved surface smoothly transitioning with the occlusal surface of the proximal and distal neighboring teeth. Due to the arrangement structure, after the shell-shaped tooth appliance 400 is worn by a patient, the shell structure which wraps the teeth is smooth, and foreign body sensation in the mouth is small.

In some embodiments, the eruption cavity 420 is further based on the size, position, shape, and orientation settings of the teeth corresponding to the jaw and the one or more teeth that have not grown to erupt to predetermined parameters, such that the structure of the eruption cavity 420 does not affect the maxillomandibular engagement relationship settings. The occlusal surface of the eruption cavity 420 of this embodiment can be designed as plane, curved surface or with carry out the structure that unsmooth matches to jaw tooth, according to the occlusal surface to jaw tooth design eruption cavity 420, can make eruption cavity 420 with carry out the cusp nest to jaw tooth and match, or make the occlusal surface of this eruption cavity 420 with carry out the unsmooth matching of occlusal surface to jaw tooth.

Example 5

A prediction method of eruption cavities of shell-shaped dental appliances comprises the steps of designing at least one shell-shaped dental appliance 500 which enables teeth to be gradually adjusted from an initial position to a target correction position and can erupt simultaneously according to a correction plan; one of the shell-shaped dental appliances 500 includes an appliance body 510 that accommodates the geometry of the maxillary or mandibular plurality of teeth and at least one eruption cavity 520 that accommodates one or more teeth that have not grown to erupt at predetermined parameters; the eruption cavity 520 is predicted based on a third predetermined parameter of the far and near adjacent teeth of the one or more teeth which do not grow to eruption predetermined parameters, so that the inner surface of the eruption cavity 520 and the outer surface of the teeth which do not grow to eruption predetermined parameters are arranged in a gap; the predetermined eruption parameter is designed to include a tooth parameter after complete eruption of the one or more non-grown or incompletely grown teeth.

In some embodiments, the third predetermined parameter comprises: the tooth is characterized by comprising a maximum size of the far-middle-direction adjacent tooth in the buccal-lingual radial direction, a maximum size of the near-far-middle direction and a maximum size of the tooth long-axis direction height of the near-middle-direction adjacent tooth. In some embodiments, as shown in fig. 13 and 14, the eruption cavity 520 of the shell-shaped dental appliance 500 is adapted to erupt around the second premolar, and the third predetermined parameter is the maximum dimension L in the lingual direction of the first molar teeth₃Maximum dimension in the mesial-distal direction D₃And the maximum dimension H of the height of the adjacent tooth in the direction of the long axis in the mesial direction₃To determine the maximum dimension L of the second premolar erupting cavity 520 in the bucco-lingual radial direction₃', maximum dimension in the mesial-distal direction D₃' and maximum dimension H of the height of the neighboring tooth in the direction of the long axis in the mesial direction₃'. The eruption cavity 520 that designs based on the biggest size of far direction adjacent tooth's bucco-lingual diameter direction, the biggest size of nearly far direction and the biggest size of nearly middle direction adjacent tooth major axis direction height is enough to accept one or more do not grow to the tooth of erupting predetermined parameters to make the size of the eruption cavity 520 of design slightly be greater than this one or more do not grow to the tooth of erupting predetermined parameters, in order to guarantee to erupt can clearance setting between cavity 520 and the eruption tooth.

In some embodiments, the eruption cavity 520 includes a labial/buccal surface, a lingual surface and an occlusal surface, wherein the labial/buccal surface is a plane or a curved surface smoothly transitioning with the labial/buccal surface of the adjacent tooth in the proximal and distal directions, the lingual surface is a plane or a curved surface smoothly transitioning with the lingual surface of the adjacent tooth in the proximal and distal directions, and the occlusal surface is a plane or a curved surface smoothly transitioning with the occlusal surface of the adjacent tooth in the proximal and distal directions. Due to the arrangement structure, the shell-shaped tooth appliance 500 worn by the patient has a smoother shell structure for wrapping the teeth, and foreign body sensation in the mouth is small.

In some embodiments, the eruption cavity 520 is further based on the size, location, shape, and orientation settings of the teeth corresponding to the jaw and the one or more teeth that have not grown to erupt to predetermined parameters, such that the structure of the eruption cavity 520 does not affect the maxillomandibular engagement relationship settings. The occlusal surface of the eruption cavity 520 of this embodiment can be designed as a plane, a curved surface or a structure that carries out concave-convex matching to the jaw teeth, according to the occlusal surface to the jaw teeth design eruption cavity 520, can make the eruption cavity 520 and carry out the fossa matching to the jaw teeth, or make the occlusal surface of this eruption cavity 520 and carry out the concave-convex matching of occlusal surface to the jaw teeth.

In some embodiments, the eruption cavity 520 is a cylindrical structure, an elliptical cylinder or a polygonal prism structure with a number of side edges not less than four, and may be set according to the number and type of edentulous teeth, or may be adaptively selected according to eruption gaps existing between adjacent teeth.

While the foregoing is directed to the preferred embodiment of the present invention, it is not intended to detail all of the same, and it is to be understood that such embodiment is merely illustrative of the present invention and is not to be considered as limiting the scope of the invention, which is limited only by the claims and their full scope and equivalents.

The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The technical features of the above different embodiments can be arbitrarily combined without conflict, and the improvement and adjustment made by those skilled in the art in the practical application according to the present invention still belong to the protection scope of the present invention.