阅读说明：本技术 牵引装置及具有牵引装置的壳状牙齿矫正器、系统和套组 (Traction device and shell-shaped dental appliance, system and set with traction device ) 是由 赵晓磊 姚峻峰 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种牵引装置及具有牵引装置的壳状牙齿矫正器、系统和套组矫正器矫正器,其中,牵引装置包括一牵引构件,该牵引构件包括用于牵引的牵引部、连接部及设有一力分散构件的安装部,所述牵引部设置于所述连接部的一端,所述安装部设置于所述连接部的另一端,所述牵引装置通过所述安装部与所述壳状牙齿矫正器固定连接,其中,当所述牵引部被牵引时,所述安装部通过所述力分散构件将牵引产生的力分散至所述壳状牙齿矫正器。本发明提供的牵引装置及具有牵引装置的壳状牙齿矫正器、系统和套组当被牵引时变形较小且不易发生断裂。(The invention discloses a traction device, a shell-shaped dental appliance with the traction device, a system and a set of appliance appliances, wherein the traction device comprises a traction component, the traction component comprises a traction part for traction, a connecting part and an installation part provided with a force dispersion component, the traction part is arranged at one end of the connecting part, the installation part is arranged at the other end of the connecting part, the traction device is fixedly connected with the shell-shaped dental appliance through the installation part, and when the traction part is pulled, the installation part disperses the force generated by traction to the shell-shaped dental appliance through the force dispersion component. The invention provides a traction device, a shell-shaped dental appliance with the traction device, a system and a set, which have small deformation and are not easy to break when being pulled.)

1. A traction device for a shell-shaped dental appliance, comprising a traction member, the traction member comprising a traction portion for traction, a connecting portion and an installation portion provided with a force dispersion member, the traction portion being provided at one end of the connecting portion, the installation portion being provided at the other end of the connecting portion, the traction device being fixedly connected to the shell-shaped dental appliance via the installation portion, wherein, when the traction portion is pulled, the installation portion disperses a force generated by the traction to the shell-shaped dental appliance via the force dispersion member.

2. The traction device for a shell-shaped dental appliance according to claim 1, wherein the force spreading member has a mounting surface capable of covering a correspondingly disposed traction device mounting area on the shell-shaped dental appliance, the force spreading member being fixedly connected to the shell-shaped dental appliance via the mounting surface, the mounting surface of the force spreading member covering a minimum area greater than a normal mounting area, the normal mounting area being 1.0 to 3.0 times the area of the minimum mounting area that meets the traction force requirement.

3. The traction device for a shell-shaped dental appliance as claimed in claim 2, wherein when the traction device is a standard, the area of the regular mounting surface is the area of the mounting surface of the standard.

4. The traction device for a shell-shaped dental appliance as claimed in claim 2, wherein the minimum area covered by the mounting surface of the force-distributing member is 1.01 to 3.0 times the normal mounting area.

5. A traction device for a shell-shaped dental appliance according to claim 2, wherein the minimum mounting area to meet the traction force requirement is determined based on material parameters of the traction device, size parameters of the traction device, shape parameters of the traction device, form of the fixed connection, traction force, and shape parameters of the mounting surface of the force spreading member.

6. A traction device for a shell-shaped dental appliance as claimed in any one of claims 2 to 5, wherein the force spreading member is provided at one end of the connecting portion, which is integrally formed with the traction device, and the force spreading member is the mounting portion.

7. A traction device as claimed in any one of claims 2 to 5, wherein the force spreading member and the mounting portion are of separate design, the mounting portion being fixedly connected to the force spreading member and to the shell-shaped dental appliance via the force spreading member.

8. The traction device for a shell-shaped dental appliance as in claim 2, wherein the force spreading member comprises a mounting base by which the force spreading member is fixedly connected directly to the shell-shaped dental appliance.

9. The traction device for a shell-shaped dental appliance as claimed in claim 8, wherein the mounting base has an area larger than the conventional mounting area.

10. The traction device for a shell-shaped dental appliance according to claim 2, wherein the force spreading member comprises a mounting base and a force spreading sub-element, one end of the force spreading sub-element being fixed to a face of the mounting base facing the shell-shaped dental appliance and the other end of the force spreading sub-element being adapted for fixed connection with the shell-shaped dental appliance.

11. The distraction apparatus for a shell-shaped dental appliance of claim 10, wherein the sum of the areas of the fixed connection of the force spreading sub-element to the shell-shaped dental appliance is greater than the normal installation area.

12. The distraction apparatus for a shell-shaped dental appliance of claim 11, wherein the force spreading sub-member comprises a plurality of connecting bodies, the force spreading sub-member being integrally formed with the mounting base or the connecting bodies being fixedly attached to a face of the mounting base facing the shell-shaped dental appliance.

13. A traction device for a shell-shaped dental appliance as claimed in claim 12, wherein the connecting body is formed by the mounting base projecting outwardly towards a face of the shell-shaped dental appliance when the force-distributing sub-element is integrally formed with the mounting base.

14. A traction device as claimed in claim 12, wherein the connecting body is a post having one end fixed to a side of the mounting base facing the shell-shaped dental appliance and the other end adapted to be fixedly connected to the shell-shaped dental appliance.

15. A traction device for a shell-shaped dental appliance as claimed in claim 14, wherein the cylinder is a cylinder or a prism.

16. A traction device for a shell-shaped dental appliance as claimed in claim 10, wherein the force spreading sub-elements are regularly or irregularly distributed on the side of the mounting base facing the shell-shaped dental appliance such that when the traction portion is pulled, the force spreading sub-elements spread the force generated by the pulling substantially evenly to the shell-shaped dental appliance.

17. The traction device for a shell-shaped dental appliance as claimed in claim 1, wherein the force spreading member is generally elongated.

18. The traction device for a shell-shaped dental appliance according to claim 17, wherein the force spreading member is integrally formed with the traction device at an end of the connecting portion opposite to the traction portion, and the end of the connecting portion opposite to the traction portion is connected to a middle portion or an end portion of the force spreading member.

19. The traction device for a shell-shaped dental appliance as claimed in claim 17, wherein the force spreading member and the mounting portion are designed separately, the mounting portion being connected to a middle or end portion of the force spreading member.

20. A traction device for a shell-shaped dental appliance as claimed in claim 2, wherein the mounting surface of the force spreading member is fixedly attached to the shell-shaped dental appliance by any one of gluing, welding, riveting.

21. A traction device for a shell-shaped dental appliance as in claim 2, wherein the mounting portion matches the contour of the traction device mounting area of the shell-shaped dental appliance.

22. A traction device as claimed in claim 20, wherein a mounting platform is provided on the shell-shaped dental appliance, the mounting portion having a profile that matches a profile of a mounting surface of the mounting platform facing the shell-shaped dental appliance, and the mounting portion being fixedly connected to the shell-shaped dental appliance by the mounting platform.

23. Shell-shaped dental appliance, comprising an appliance body and a traction device for a shell-shaped dental appliance according to any one of claims 1 to 21, which traction device is fixedly connected to the appliance body.

24. A shell-shaped dental appliance according to claim 23, wherein the appliance body includes a traction device mounting area having a stiffness greater than the stiffness of other areas of the appliance body other than the traction device mounting area.

25. A shell-shaped dental appliance according to claim 24, wherein the modulus of elasticity of the membrane material of the traction device mounting area is greater than the modulus of elasticity of the membrane material of areas of the appliance body other than the traction device mounting area.

26. A shell-shaped dental appliance according to claim 24, wherein the number of layers of the membrane in the traction device mounting area is greater than the number of layers of the membrane in areas of the appliance body other than the traction device mounting area.

27. A shell-shaped dental appliance according to claim 26, wherein the elastic modulus of the outermost membrane of the traction device fitting region is greater than the elastic modulus of the outermost membrane of the appliance body in regions other than the traction device fitting region.

28. A shell-shaped dental appliance according to claim 24, wherein the thickness of the membrane in the traction device mounting area is greater than the thickness of the membrane in areas of the appliance body other than the traction device mounting area.

29. The shell-shaped dental appliance of claim 23, wherein the traction device mounting region is provided on an outer surface of the appliance body, the force spreading member being coupled to the outer surface, wherein the mounting portion spreads a force generated by traction to the shell-shaped dental appliance through the force spreading member when the traction portion is pulled.

30. The shell-shaped dental appliance of claim 23, wherein the traction device mounting area is provided to an inner surface of the appliance body, the force distribution member being coupled to the inner surface, wherein when the traction portion is pulled and generates traction force, the traction force is distributed to the shell-shaped dental appliance by the traction force distribution structure.

31. A shell-shaped dental appliance system comprising a plurality of shell-shaped dental appliances, wherein at least one of the plurality of shell-shaped dental appliances is a shell-shaped dental appliance according to any one of claims 23-30.

32. A set of shell-shaped dental appliances comprising an upper jaw shell-shaped dental appliance comprising an appliance body for enclosing at least part of an upper jaw tooth and a lower jaw shell-shaped dental appliance comprising an appliance body for enclosing at least part of a lower jaw tooth, characterized in that the upper and/or lower jaw shell-shaped dental appliance is a shell-shaped dental appliance according to any one of claims 23-30.

Technical Field

The invention belongs to the technical field of tooth correction, and particularly relates to a traction device, a shell-shaped tooth appliance with the traction device, a system and a set.

Background

The traditional tooth correction technology generally adopts a bracket and a steel wire to move teeth, so as to achieve the purpose of correcting malocclusion. However, such brackets and wires are too numerous and conspicuous, which greatly affects the appearance of the teeth and may cause oral lesions such as inflammation of the gums, demineralization and discoloration of the teeth. On the basis, an invisible tooth correcting system is produced, and the system adopts an invisible shell-shaped tooth corrector made of elastic transparent high polymer materials to realize the movement of teeth. The whole process of correcting can hardly influence daily life and social contact, simultaneously, because the patient can take by oneself and wear, the daily oral health maintenance of being convenient for also makes whole process of correcting more convenient.

In the dental clinical orthodontic treatment, in a scheme of performing orthodontic treatment or orthognathic treatment using a shell-shaped orthodontic appliance, the orthodontic effect may be enhanced by using a functional attachment. A common functional attachment comprises a pulling structure for suspending the pulling element such that a pulling force acts on the respective location. In many cases, such as anterior teeth depression, teeth elongation, gap adjustment, eruption traction, teeth torsion, etc., it is necessary to perform an auxiliary treatment by means of a traction structure.

In the prior art, through prefabricating the opening on shell orthodontic appliances or cutting the opening on shell orthodontic appliances, paste draw gear on the tooth or directly hang the traction piece through cutting the opening through prefabricating the opening, but prefabricating the opening on shell orthodontic appliances or cutting the opening can destroy shell orthodontic appliances's structure itself for the laminating of unscrambler worsens and the dynamics of rectifying of unscrambler is not enough.

In the prior art, the traction device can be directly adhered to the surface of the shell-shaped dental appliance, but when force generated during traction is concentrated and distributed on the shell-shaped dental appliance, the shell-shaped dental appliance is seriously deformed and even can be broken, and the technical scheme for solving the problems is provided.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provides a traction device which has small deformation and is not easy to break during traction, and a shell-shaped dental appliance, a system and a set with the traction device.

The technical scheme provided by the invention is as follows:

a traction device for a shell-shaped dental appliance, comprising: a traction member, the traction member including a traction portion for traction, a connection portion and an installation portion provided with a force dispersion member, the traction portion being provided at one end of the connection portion, the installation portion being provided at the other end of the connection portion, the traction device being fixedly connected to the shell-shaped dental appliance via the installation portion, wherein, when the traction portion is pulled, the installation portion disperses a force generated by the traction to the shell-shaped dental appliance via the force dispersion member. According to the traction device, the shell-shaped dental appliance with the traction device, the system and the set of appliance, the force dispersion component with the force dispersion effect is arranged on the installation part and is connected with the shell-shaped dental appliance through the force dispersion component, when the traction part is pulled, the force generated during the pulling is dispersed to the shell-shaped dental appliance through the force dispersion component directly connected with the shell-shaped dental appliance, the force on the shell-shaped dental appliance is dispersed, the unexpected influence of the force generated during the pulling on the shell-shaped dental appliance is eliminated or at least partially eliminated, the unexpected deformation or fracture of the shell-shaped dental appliance is reduced, and the correction effect is improved.

Further preferably, the force dispersing member has a mounting surface capable of covering a traction device mounting area correspondingly provided on the shell-shaped dental appliance, the force dispersing member is fixedly connected with the shell-shaped dental appliance through the mounting surface, a minimum area covered by the mounting surface of the force dispersing member is larger than a conventional mounting area, and the conventional mounting area is 1.0-3.0 times of the area of the minimum mounting area satisfying the traction force requirement. In this embodiment, since the area of the mounting surface is larger than the conventional mounting area and the mounting surface having a larger area is used to distribute the force generated during traction to the shell-shaped orthodontic appliance, the force distribution is realized by enlarging the contact area, and thus the force on the shell-shaped orthodontic appliance is prevented from being too concentrated during traction, and the problem of breakage of the shell-shaped orthodontic appliance is solved.

Further preferably, when the traction device is a standard part, the area of the conventional mounting surface is the area of the mounting surface of the standard part.

Further preferably, the minimum area covered by the mounting surface of the force dispersing member is 1.01 to 3.0 times the conventional mounting area.

Further preferably, the minimum installation area for meeting the traction force requirement is determined on the basis of material parameters of the traction means, size parameters of the traction means, shape parameters of the traction means, form of the fixed connection, traction force and shape parameters of the mounting surface.

Further preferably, the force dispersing member is integrally formed with the traction device at one end of the connecting portion, and the force dispersing member is the mounting portion. In the embodiment, the integrated forming design not only reduces the technical process and improves the processing efficiency of the process, but also ensures the stability of the traction device through the integrated design.

Further preferably, the force distribution member and the mounting portion are designed separately, the mounting portion being fixedly connected to the force distribution member and to the shell-shaped dental appliance via the force distribution member. The model of the force dispersion component and the model of the installation part can be flexibly selected according to different correction requirements through split design, so that the adaptability between the force dispersion components is improved, and the correction flexibility and the applicability are also improved.

Further preferably, the force distributing member comprises a mounting base, by means of which the force distributing member is fixedly connected directly to the shell-shaped dental appliance.

Further preferably, the area of the mounting base is larger than the conventional mounting area.

Further preferably, the force distributing member comprises a mounting base and a force distributing sub-element, one end of the force distributing sub-element being fixed to a side of the mounting base facing the shell-shaped dental appliance and the other end of the force distributing sub-element being adapted to be fixedly connected to the shell-shaped dental appliance. In this embodiment, the force dispersing sub-members are provided and connected to the shell-shaped dental appliance through the force dispersing sub-members to disperse the force generated during traction to the shell-shaped dental appliance, and the number of the force dispersing sub-members can be flexibly adjusted, so that the technical effect of flexibly adjusting the force dispersed to the surface of the shell-shaped dental appliance is achieved.

It is further preferred that the sum of the areas of the force spreading sub-element in fixed connection with the shell-shaped dental appliance is larger than the conventional mounting area. In this embodiment, the force generated during traction is distributed to the shell-shaped dental appliance by the combined action of the plurality of force distribution sub-members, and the sum of the areas of the plurality of force distribution sub-members fixedly connected to the shell-shaped dental appliance is larger than the conventional installation area, so that the plurality of force distribution sub-members can better distribute the force generated during traction to the shell-shaped dental appliance than the conventional installation area, and the problem of deformation or breakage caused by excessive concentration of the force on the shell-shaped dental appliance during traction is solved.

It is further preferred that the force spreading sub-element comprises a plurality of connecting bodies, the force spreading sub-element being integrally formed with the mounting base or the connecting bodies being fixedly connected to a side of the mounting base facing the shell-shaped dental appliance.

Further preferably, when the force distributing sub-member is integrally formed with the mounting base, the connecting body is formed by the mounting base projecting outwardly toward a face of the shell-like dental appliance.

Further preferably, the connecting body is a column, one end of the column is fixed on the surface of the mounting base facing the shell-shaped dental appliance, and the other end of the column is used for being fixedly connected with the shell-shaped dental appliance.

It is further preferred that the force spreading sub-elements are regularly or irregularly distributed on the side of the mounting base facing the shell-shaped dental appliance, such that when the pulling portion is pulled, the force spreading sub-elements spread the forces generated by the pulling substantially evenly to the shell-shaped dental appliance. In this embodiment, can set up or adjust the distribution state of power dispersion subelement on the installation basal portion according to correcting the demand in a flexible way, and then can realize more rationally will pull the power dispersion that produces to shell form tooth unscrambler, solve the deformation or the fracture problem that the power was too concentrated and is caused on the shell form tooth unscrambler when pulling.

Further preferably, the cylinder is a cylinder or a prism.

Further preferably, the mounting surface of the force distribution member is fixedly attached to the shell-shaped dental appliance by any one of adhesion, welding, and riveting.

Further preferably, the force dispersing member is elongated or elliptical in its entirety.

Further preferably, the force dispersing member is integrally formed with the traction device at an end of the connecting portion opposite to the traction portion, and the end of the connecting portion is connected to a middle portion or an end portion of the force dispersing member. In this embodiment, the moment during traction can be flexibly adjusted by setting the connecting position of the connecting part and the force dispersing component, and the distance between the traction pieces on different traction devices can be flexibly adjusted, so that the problem of deformation or fracture caused by too concentrated force on the shell-shaped dental appliance during traction is solved.

Further preferably, the force distribution member and the mounting portion are designed separately, the mounting portion being connected to a middle or end portion of the force distribution member.

It is further preferred that the mounting portion matches the contour of the traction device mounting area of the shell-shaped dental appliance. In this embodiment, because the installation department matches with the profile of the traction device installation area of the shell-shaped dental appliance, so that the installation department can be connected with the traction device installation area more closely, and further the effective connection area between the installation department and the traction device installation area is increased, and the force generated when being pulled is dispersed to the shell-shaped dental appliance by using the larger effective installation area, thereby solving the problem of deformation or fracture caused by too concentrated force on the shell-shaped dental appliance when being pulled.

Further preferably, a mounting platform is provided on the shell-shaped dental appliance, the shape of the mounting portion facing the shell-shaped dental appliance matches the contour of the mounting platform, and the mounting portion is fixedly connected with the shell-shaped dental appliance through the mounting platform. In this embodiment, the problem of the adhesion stability caused by the uneven surface of the shell-shaped dental appliance or the mounting portion is solved by providing the mounting platform, and the stable contact connection can be reestablished between the traction device mounting region and the mounting base portion by the platform structure, thereby improving the adhesion stability. And because the installation department matches with the profile in draw gear installation region of shelly tooth unscrambler, so make the connection that can laminate more between installation department and the draw gear installation region, and then improve the effective connection area between installation department and the draw gear installation region to utilize great effective installation area to realize dispersing to shelly tooth unscrambler to the power that produces when being drawn, solve the deformation or the fracture problem that shelly tooth unscrambler upper force too concentrated and lead to when drawing.

It is further preferred that the mounting surface of the force distributing member is fixedly connected to the shell-shaped dental appliance to form a connection surface, and that in each connection area of the connection surface the size of the area of the connection area is proportional to the amount of force generated by the shell-shaped dental appliance being pulled at the connection area.

A shell-shaped dental appliance comprising an appliance body and a traction device for a shell-shaped dental appliance as in any of the above embodiments, wherein the traction device is fixedly connected to the appliance body.

Further preferably, the orthotic body includes a traction device mounting region having a stiffness greater than a stiffness of other regions of the orthotic body other than the traction device mounting region. In this embodiment, the rigidity of the traction device mounting region is set to be higher than the rigidity of other regions of the appliance body except the traction device mounting region, when the traction device generates force, the deformation of the traction device mounting region can be reduced, and the traction device mounting region and the mounting region are always in a connection relation of fitting so as to ensure the effective contact area between the traction device mounting region and the mounting region, and finally the traction force generated during traction is dispersed to the shell-shaped dental appliance, so that the problem of undesirable deformation or fracture of the shell-shaped dental appliance is solved.

Further preferably, the number of layers of the membrane in the traction device mounting area is greater than the number of layers of the membrane in the other areas of the brace body except the traction device mounting area. In this embodiment, the number of layers of the membrane at the position of the installation region of the traction device is increased to enhance the rigidity at the position, and further, undesired deformation of the region when being pulled is avoided or reduced, so that the effective contact area between the installation region of the traction device and the installation region is increased, and the force generated during pulling is dispersed to the shell-shaped dental appliance, so that the problem of undesired deformation or breakage of the shell-shaped dental appliance is solved.

Further preferably, the elastic modulus of the outermost membrane of the traction device mounting area is greater than the elastic modulus of the outermost membrane of the other areas of the orthosis body except the traction device mounting area. In this embodiment, the elastic modulus of the outermost membrane at the position of the installation area of the traction device is set to be greater than the elastic modulus of the other areas on the appliance body at the outer membrane, so that the rigidity of the position of the installation area of the traction device can be improved, and further, the undesirable deformation of the area when the area is pulled is avoided or reduced, so that the effective contact area between the installation area of the traction device and the installation area is improved, the force generated during the pulling is dispersed to the shell-shaped appliance, and the problem of the undesirable deformation or the fracture of the shell-shaped appliance is solved.

Further preferably, the diaphragm thickness of the traction device mounting region is greater than the diaphragm thickness of the other regions of the orthotic body other than the traction device mounting region. In this embodiment, the thickness of the membrane at the location of the traction device mounting region is increased to reduce the elasticity at that location and increase the stiffness at that location, thereby avoiding or reducing undesirable deformation of that region when being pulled, to improve the effective contact area between the traction device mounting region and the mounting portion, to achieve a distribution of the forces generated during pulling to the shell-shaped dental appliance, to solve the problem of undesirable deformation or fracture of the shell-shaped dental appliance.

Further preferably, the modulus of elasticity of the membrane material of the traction device mounting region is greater than the modulus of elasticity of the membrane material of regions of the orthosis body other than the traction device mounting region. In this embodiment, the elastic modulus of the membrane material of the traction device mounting region is greater than the elastic modulus of the membrane material of other regions on the appliance body, so that the rigidity of the traction device mounting region can be improved, and further, the undesirable deformation of the region when being pulled is avoided or reduced, the effective contact area between the traction device mounting region and the mounting region is improved, the force generated during pulling is dispersed to the shell-shaped dental appliance, and the problem of the undesirable deformation or fracture of the shell-shaped dental appliance is solved.

Further preferably, the traction device mounting region is provided on an outer surface of the appliance body, and the force dispersion member is connected to the outer surface, wherein the mounting portion disperses a force generated by traction to the shell-shaped dental appliance through the force dispersion member when the traction portion is pulled.

Further preferably, the traction device mounting region is provided to an inner surface of the appliance body, and the force distributing member is coupled to the inner surface, wherein when the traction portion is pulled and generates traction force, the traction force is distributed to the shell-shaped dental appliance by the traction force distributing structure.

A shell-shaped dental appliance system comprising a plurality of shell-shaped dental appliances, at least one of the plurality of shell-shaped dental appliances being a shell-shaped dental appliance as in any one of the embodiments described above.

A set of shell-like dental appliances comprising an upper jaw shell-like dental appliance comprising an appliance body for enclosing at least part of an upper jaw tooth and a lower jaw shell-like dental appliance comprising an appliance body for enclosing at least part of a lower jaw tooth, the upper and/or lower jaw shell-like dental appliances being shell-like dental appliances as in any of the embodiments above.

Drawings

The foregoing features, technical features, advantages and embodiments are further described in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic structural view of a traction device for a shell-shaped dental appliance according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the shell-shaped dental appliance of FIG. 1 taken along line A-A in one embodiment;

FIG. 3 is a schematic cross-sectional view of the shell-shaped dental appliance of FIG. 1 taken along line A-A in another embodiment;

FIG. 4 is a schematic view of a traction device in one embodiment;

FIG. 5 is a schematic view of a traction device in another embodiment thereof;

FIG. 6 is a schematic cross-sectional view of the shell-shaped dental appliance of FIG. 1 taken along line A-A in other embodiments;

FIG. 7 is a schematic view of a draft gear in an alternative embodiment;

FIG. 8 is a schematic view of a draft gear mounting area provided in an embodiment;

FIG. 9 is a schematic view of the assembly of a towing attachment through a mounting platform provided in one embodiment;

FIG. 10 is a schematic illustration of a draft gear including a force spreading sub provided in an embodiment;

FIG. 11 is a schematic view of a shell-shaped dental appliance including a force spreading sub-assembly according to one embodiment;

FIG. 12 is a schematic bottom view including a force spreading member provided in one embodiment;

FIG. 13 is a schematic view of an embodiment providing an irregular distribution of force spreading sub-elements to a mounting base;

FIG. 14 is a schematic illustration of one embodiment providing a force spreading subassembly with a regular distribution to a mounting base;

figure 15 is a schematic view of a force distributing member provided in one embodiment fitted to an inner surface of a shell-shaped dental appliance.

In the figure: 10. a shell-shaped dental appliance; 11. a traction device mounting area; 12. mounting a platform; 20. a traction member; 21. a traction part; 22. a connecting portion; 23. an installation part; 24. a force dispersion member; 241. a mounting surface; 242. a force spreading subassembly; 243. an assembling portion; 100. a tooth.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

In one embodiment, as shown in fig. 1, there is provided a traction device for a shell-shaped dental appliance 10, the traction device comprising a traction member 20, the traction member 20 comprising a traction portion 21 for traction, a connecting portion 22 and a mounting portion 23 provided with a force spreading member 24. The traction portion 21 is provided at one end of the connection portion 22, the mounting portion 23 is provided at the other end of the connection portion 22, and the traction device is fixedly connected to the shell-shaped orthodontic appliance 10 through the mounting portion 23, wherein the mounting portion 23 disperses a force generated by traction to the shell-shaped orthodontic appliance 10 through the force dispersion member 24 when the traction portion 21 is pulled.

The shell-shaped orthodontic appliance is a continuous and orderly appliance for correcting the dentognathic deformity by designing and manufacturing a series of orderly transparent movable orthotics by means of computer three-dimensional reconstruction, auxiliary diagnosis design technology and computer manufacturing technology and utilizing resilience force generated by elastic deformation of the orthotics material.

The traction component is a functional accessory which can be used for enhancing the correction effect, and specifically can be a traction buckle or a traction hook and the like. Referring to fig. 1 and 2, a shell-shaped dental appliance 10 and a traction member 20 are included. The traction portion 21 of the traction member 20 can be used for suspending a traction element (not shown), and the force generated by the traction of the traction element acts on the corresponding position to achieve the expected correcting plan, wherein the traction element can be an elastic body such as a rubber band or a spring. The traction member 20 comprises a mounting portion 23, the mounting portion 23 is used for connecting with the shell-shaped dental appliance 10, and the traction portion 21 and the mounting portion 23 are connected through a connecting portion 22, so that the force generated when the traction portion 23 is pulled is transmitted to the shell-shaped dental appliance 10 through the mounting portion 23, and the expected correcting plan is achieved by utilizing the interaction force of the shell-shaped dental appliance 10 and the traction device. As may be embodied, the guide tooth 100 is gradually changed from an initial position to a target correction position. The initial position can be the relative position of the digital model collected when the patient is hospitalized, and the target correcting position can be the position where the final correcting effect is carried out by doctors and medical designers according to the patient appeal and the intraoral condition.

With continued reference to fig. 1 and fig. 2, in an embodiment, the connecting portion 22 and the mounting portion 23 are integrally formed, so that the process is reduced and the processing efficiency is improved due to the integrally formed design, and the stability of connection between the connecting portion 22 and the mounting portion 23 can be ensured by the integrally formed manner, so that the stability of the traction device is improved, and the traction device can provide a stable correction force. In another embodiment, the connection portion 22 and the installation portion 23 are independent from each other, for example, the connection portion 22 and the installation portion 23 can be fixedly connected to each other, the fixed connection includes any one of bonding, welding and riveting, or the connection portion 22 and the installation portion 23 can be detachably connected to each other, the detachable connection mode can improve the installation flexibility between the connection portion 22 and the installation portion 23, the connection portion 22 or the installation portion 23 of the corresponding model can be matched according to the specific correction requirement, the connection portion 22 or the installation portion 23 can be flexibly selected, the adaptability of the connection portion 22 and the installation portion 23 can be enhanced, the correction adaptability can be improved, and the correction range can be enlarged.

In an actual orthodontic scenario, when a force generated by the traction device is transmitted to the shell-shaped dental appliance, the mechanical property of the shell-shaped dental appliance itself may be affected, for example, the shell-shaped dental appliance may be deformed undesirably and largely, and worse, the shell-shaped dental appliance may also be broken. Therefore, how to reduce or avoid the influence of the force generated when the shell-shaped dental appliance is pulled on the correcting effect is very important.

In one embodiment, referring to fig. 2 and 3, the force dispersing member 24 is integrally formed with the traction device at one end of the connecting portion 22, and the force dispersing member 24 is the mounting portion 23. That is, the force dispersing function is achieved by the mounting part, and specifically, one end of the mounting part (i.e., the force dispersing member) is directly connected to the connecting part 22 and the other end is available to be directly connected to the shell-shaped orthodontic appliance 10, so as to achieve the dispersion of the force generated when the traction part is pulled to the shell-shaped orthodontic appliance. In the above embodiment, the direct integrated into one piece of power dispersion part and draw gear has not only reduced the process through the integrated into one piece design and has improved machining efficiency to draw gear's steadiness can also be guaranteed through the integrated design.

With continued reference to fig. 2, in one embodiment, the force dispersing member, i.e., the mounting portion 23, is an elongated shape as a whole, and the elongated shape may be, for example, a rectangle, an oval, an oblong, or the like, without limitation. In one embodiment, the mounting surface of the force distributing member is fixedly connected to the shell-shaped dental appliance to form a connection surface, and the size of the area of the connection area in each connection area of the connection surface is proportional to the amount of force generated by the shell-shaped dental appliance being pulled at the connection area. That is, the shape of the mounting surface at different regions is related to the amount of traction experienced at that region, and in particular, the greater the area at the corresponding region location that is affected by the greater the traction.

Referring to fig. 4, in one embodiment, when the force spreading member 24 is elliptical, the end of the connecting portion 22 opposite the traction portion 21 is connected to the middle of the force spreading member 24. While satisfying the force dispersion effect, the elliptical shape of the force dispersion member is smaller and more compact, which can improve the comfort of the user wearing the shell-shaped dental appliance. And by connecting the end of the connecting part 22 opposite to the traction part 21 to the middle part of the force dispersion member 24, the force generated when being pulled can be uniformly dispersed to the surface of the shell-shaped dental appliance, and the shell-shaped dental appliance can be prevented from being excessively concentrated at the bonded position to cause serious deformation or even breakage when being pulled. Referring to fig. 3 or 5, when the force distribution member 24 is shaped like a rectangle, the end of the connection portion 22 opposite to the traction portion 21 is connected to the end of the force distribution member 24, and the moment at different positions can be flexibly adjusted by connecting one end of the connection portion 22 to the end of the strip, thereby flexibly adjusting the correction force at different positions. Moreover, the end of the connecting part 22 opposite to the traction part 21 is connected to the end of the force dispersing component 24, so that the distance between the two traction devices can be reduced, and further, the traction devices with smaller sizes can be used under the same correction force requirement, the foreign body sensation in the oral cavity is reduced, and the wearing comfort is improved.

In one embodiment, the force distributing member is disposed on the shell-shaped dental appliance in a direction that is substantially aligned with the direction of the force applied by the pulling element, such as in the case of figure 3, where the force is applied in a downward and rightward direction, the force distributing member has a length that is substantially aligned with the direction of the force applied, and the force distributing member is required to be separated from the shell-shaped dental appliance at an angle relative to the force distributing member, i.e., the force distributing member is not easily separated from the shell-shaped dental appliance, thereby increasing the stability of the connection between the force distributing member and the shell-shaped dental appliance. It should be noted that, in other embodiments, the position where the end of the connecting portion 22 opposite to the traction portion 21 is connected to the force distribution member 24 is not limited, and may be determined at the end, the middle or any other position, specifically according to different orthodontic plans.

Referring to fig. 6 and 7, in one embodiment, the force dispersing member 24 and the mounting portion 23 are designed as separate bodies, in which case the force dispersing member 24 is disposed at the bottom of the mounting portion 23, and the mounting portion 23 and the force dispersing member are fixedly connected, wherein the fixed connection may be any one of bonding, welding or riveting. The other end of the force dispersing member 24 is fixedly attached to the shell-shaped dental appliance 10. In the above embodiment, the force dispersion member and the installation part are designed in a split manner, so that the corresponding force dispersion member and the installation part can be selected according to different correction requirements, the adaptability of different parts is improved, and the correction effect is improved. Can realize the installation department of different specifications or model and draw gear's suitability through independent shaping respectively, and then can select the installation department or the power dispersion component that corresponds the specification according to concrete needs of correcting, not only guarantee draw gear's traction effect, can also realize utilizing the best installation department to match with shell form tooth unscrambler simultaneously to avoid the unexpected deformation of unscrambler to the at utmost, finally realize improving and correct the effect and enlarge the purpose of correcting application scope. Similarly, when the force dispersing member and the mounting portion are designed separately, the mounting portion is connected to the middle or end portion of the force dispersing member.

With continued reference to fig. 6 and 7, in one embodiment, the mounting portion 23 and the force dispersing member 24 are fixedly attached by bonding, wherein a first bonding area is provided on the mounting surface 231 of the mounting portion, and a second bonding area is provided on the force dispersing member 24, and can be adhesively abutted by the first bonding area and the second bonding area. The adhesive fixing mode has the advantages of simple structure, relatively low cost and easiness in implementation, and the adhesive mode does not need to open the shell-shaped dental appliance, so that the overall structure of the shell-shaped dental appliance cannot be influenced, and the tooth correcting effect of the shell-shaped dental appliance cannot be influenced.

In the above embodiment, the force dispersing member is provided on the mounting portion, and the force dispersing member has the capability of dispersing the force generated when the traction portion is pulled to the shell-shaped appliance connected thereto, so that the undesirable influence of the traction force generated when the traction portion is pulled on the shell-shaped appliance can be eliminated or partially eliminated, for example, the deformation influence on the shell-shaped appliance can be eliminated or partially eliminated, and the occurrence of the fracture condition of the shell-shaped appliance in the correction process can be avoided. In one embodiment, the force distribution member has a thickness to improve strength of the force distribution member, and the traction force generated when the traction portion is pulled is distributed to the shell-shaped orthodontic appliance body through the force distribution member.

As shown in fig. 6 to 6, in one embodiment, the force dispersing member 24 has a mounting surface 241 capable of covering the traction device mounting region 11 correspondingly provided on the shell-shaped orthodontic appliance 10, the force dispersing member 24 is fixedly connected to the shell-shaped orthodontic appliance 10 through the mounting surface 241, the minimum area covered by the mounting surface 241 of the force dispersing member 24 is larger than a normal mounting area, the normal mounting area is 1.0 to 3.0 times the minimum mounting region area satisfying the traction force requirement, and when the traction device is a standard, the normal mounting area is the area of the mounting surface of the standard.

As shown in fig. 1 to 7, the shell-shaped dental appliance 10 includes a plurality of cavities for receiving maxillary or mandibular teeth, and a traction device installation region 11 for installing a traction device is provided on the cavities. The interaction between the traction device mounting area 11 and the mounting surface 241 of the traction device enables the shell-shaped orthodontic appliance 10 and the traction device to generate larger retaining force, the force application is more sufficient, the acting force generated by the deformation of the shell-shaped orthodontic appliance 10 is better transmitted to achieve an expected correction plan, the target correction effect is achieved, if the acting force can be better transmitted to the teeth 100, the movement of the teeth 100 is better achieved, and therefore the correction effect can be improved and the correction period can be shortened.

The conventional mounting area is determined based on the tractive effort that needs to be met, e.g., the conventional mounting area may be a multiple of the minimum mounting area required to meet the tractive effort. In one embodiment, the conventional mounting area is 1.0-3.0 times the minimum mounting area required for traction force, and the minimum mounting area required for traction force is determined based on the material parameters of the traction device, the size parameters of the traction device, the shape parameters of the traction device, the form of the fixed connection, the traction force, and the shape parameters of the mounting surface. The material parameters of the traction device include physical parameters of the material, such as density, poisson's ratio, elastic modulus, yield strength, thermal conductivity, specific heat capacity, linear expansion coefficient, viscoelastic parameters, and the like. The size parameters comprise the size of the traction device, and the fixed connection mode comprises bonding, clamping, riveting and the like. The shape parameters of the mounting surface comprise a circle, a rectangle or an ellipse and the like. In the above embodiment, the minimum installation area is determined according to the multidimensional parameters of the traction device, so that the minimum installation area can meet the traction requirements of the traction device, the corresponding minimum installation area can be determined based on different correction requirements, and the accuracy and the rationality of the minimum installation area are ensured.

In one embodiment, the minimum area covered by the mounting surface of the force dispersing member is 1.01 to 3.0 times the conventional mounting area. Since the conventional installation area is 1.0 to 3.0 times the minimum installation area that satisfies the traction force requirement, the minimum area covered by the installation surface of the force dispersion member is 1.01 to 3.0 times the conventional installation area, that is, the minimum area covered by the installation surface of the force dispersion member is 1.01 to 9.0 times the minimum installation area. It should be noted that the mounting surface of the force distributing member may cover an area that is not greater than the area of the cavity of one tooth of the shell-shaped dental appliance. In the above embodiment, the area of the covering region of the mounting surface of the force distribution member is set according to the minimum mounting region and the normal mounting region, and it is ensured that the force distribution member can satisfy not only the pulling requirement but also the requirement for reasonably distributing the force generated when being pulled to the shell-shaped dental appliance. In addition, a larger multiple interval (1.01-9 times) is set, so that the optimal multiple can be reasonably selected according to the unavailable correction requirement, and the adaptability and the flexibility of the product are improved. In a specific embodiment, the minimum area covered by the mounting face of the force spreading member is 2 times the conventional mounting area, which is 3 times the minimum mounting area required to meet the tractive force requirements, and then the minimum area covered by the mounting face of the force spreading member is 2 x 3-6 times the minimum mounting area.

In the above embodiment, since the area of the mounting surface of the force distribution member is larger than the conventional mounting area, and the mounting surface having a larger area distributes the force generated during traction to the shell-shaped orthodontic appliance, the force distribution is realized by enlarging the contact area, and further, the force on the shell-shaped orthodontic appliance is prevented from being too concentrated during traction, and the problem of breakage of the shell-shaped orthodontic appliance is solved.

As shown in FIG. 8, in one embodiment, the draft gear mounting area 11 is a regular or substantially regular area. The draft gear mounting area 11 may be specifically a circular or substantially circular area, an elliptical or substantially elliptical area, a rectangular or substantially rectangular area, or the like. It should be noted that, in another embodiment, the towing attachment installation area 11 may also be an irregular area, which is not limited herein. In the above embodiment, the shape of the traction device installation area 11 can be set according to different correction requirement adaptability, and the rationality of the traction installation area 11 is improved, so that the force generated when the traction part 21 is dragged can be better dispersed to the shell-shaped orthodontic appliance 10 by matching the reasonable traction installation area 11 and the installation surface 24 of the traction device, and then the correction effect of the shell-shaped orthodontic appliance 10 is improved, and the correction period is shortened.

Referring to fig. 7-8, in one embodiment, the traction device mounting area 11 is fixedly attached to the mounting surface 241. Specifically, the attachment surface 241 for fixing the adhesive attachment portion 24 may be obtained by selecting an adhesive region in the traction device attachment region 11 of the shell-shaped dental appliance and then applying an intraoral adhesive. Wherein the bonding area may be selected (one, two or more) areas with certain geometric shapes, such as regular circular areas, square areas, etc., or irregular geometric shapes, which are not limited herein, on the shell-shaped dental appliance 10. The stability of the bonding can be improved by providing a plurality of bonding areas.

As shown in fig. 1-8, in one embodiment, the force dispersing member 24 includes a mounting base by which the force dispersing member is fixedly connected directly to the shell-shaped dental appliance. The area of the mounting base is larger than the conventional mounting area. In a particular embodiment, the mounting base may be a mounting surface 241. Further, since the area of the mounting base portion is larger than the conventional mounting area, the contact area between the force distribution member 24 and the shell-shaped dental appliance 10 can be enlarged, and further, the force generated when the traction portion is pulled can be distributed to the shell-shaped dental appliance 10 through the larger contact area, so that the force applied to the local part of the shell-shaped dental appliance 10 by the force generated when the traction portion is pulled can be reduced, and the occurrence of local deformation or even breakage due to the local large force applied to the shell-shaped dental appliance 10 can be prevented.

As shown in fig. 1 to 8, in one embodiment, the mounting surface 241 of the force dispersing member 24 is fixedly attached to the shell-shaped dental appliance 10 by any one of bonding, welding, and riveting. The adhesive fixing mode has the advantages of simple structure, relatively low cost and easiness in implementation, and the adhesive mode does not need to open the shell-shaped dental appliance, so that the overall structure of the shell-shaped dental appliance cannot be influenced, and the tooth correcting effect of the shell-shaped dental appliance cannot be influenced.

As shown in fig. 12, the surface of the force distributing member 24 facing the shell-shaped orthodontic appliance may be provided with a rough structure to increase friction, thereby achieving a more stable connection between the force distributing member 24 and the shell-shaped orthodontic appliance.

In one embodiment, the mounting portion matches the contour of the traction device mounting area of the shell-shaped dental appliance. The contact area between the two can be increased by arranging a structure with matched contour, so that the force can be dispersed to the maximum extent possible. In some embodiments, referring to fig. 1-7, the mounting base 241 and the draft gear mounting area 11 are curved to match each other and the curvature of the mounting portion conforms to the curvature of the draft gear mounting area. The curved surface structure increases the contact area of the mounting base with the traction device mounting region, that is, the adhesion area, thereby improving the adhesion stability of the shell-shaped dental appliance 10 and the force distribution member 24. In some embodiments, the mounting base and the traction device mounting region 11 are planar surfaces that mate with each other, the configuration of the mating planar surfaces making attachment, such as adhesion, of the shell-shaped dental appliance to the force distributing member easier and more stable. In this embodiment, because the installation department matches with the profile of the traction device installation area of the shell-shaped dental appliance, so that the installation department can be connected with the traction device installation area more closely, and then the effective connection area between the installation department and the traction device installation area is increased, and the force generated when being pulled is dispersed to the shell-shaped dental appliance by using the larger effective installation area, thereby solving the problem of deformation or fracture caused by too concentrated force on the shell-shaped dental appliance.

In some embodiments, the mounting base and the draft gear mounting area are of a configuration to increase stable securement. Specifically, the mounting base or the traction device mounting region has a structure with a frosted surface, a textured surface, a bumped surface, or the like, which increases the specific surface area of the mounting base and the traction device mounting region, thereby enabling the adhesive to be stably attached to the surface of the mounting base or the traction device mounting region, and further improving the stability of the connection of the shell-shaped dental appliance and the force distributing member. Of course, the bonding region may be configured as other structures capable of increasing stable fixation, which will not be described in detail.

As shown in fig. 9, the shell-shaped dental appliance is provided with a mounting platform 12, the shape of the mounting portion matches the contour of the mounting platform 12, and the mounting portion is fixedly connected with the shell-shaped dental appliance through the mounting platform 12. In some embodiments, in view of the non-planar structure of the surface of the shell-shaped dental appliance, which makes the adhesion between the shell-shaped dental appliance and the force spreading member unstable, in order to improve the stability of the adhesion of the mounting base to the traction device mounting region, the surface of the shell-shaped dental appliance of the present embodiment is provided with a mounting platform 12, which may be in particular a boss structure, the traction device mounting region 11 is provided on the mounting platform 12, and the shape of the mounting base matches the contour of the boss structure. The above-described platform structure solves the problem of adhesion stability caused by the uneven surface of the shell-shaped dental appliance 10 or the mounting portion 23, and makes the traction device mounting region 11 reestablish a stable contact connection with the mounting base portion by the platform structure, thereby improving adhesion stability. And because the installation department matches with the profile in draw gear installation region of shelly tooth unscrambler, so make the connection that can more laminate between installation department and the draw gear installation region, and then improve the effective connection area between installation department and the draw gear installation region to utilize great effective installation area to realize dispersing to shelly tooth unscrambler to the power that produces when being drawn, the deformation or the fracture problem that the power on the shelly tooth unscrambler too concentrated and lead to when solving and drawing.

In this embodiment, the shell-shaped orthodontic appliance is fixedly connected to the mounting portion by adhesion, wherein different adhesive strengths can be provided according to the difference of the adhesives, and the targeted intraoral adhesive can be selected and used. Therefore, the bonding mode of the embodiment can be non-detachable fixed connection or detachable fixed connection, and can be designed according to actual clinical requirements.

As shown in fig. 10 and 11, in one embodiment, the force dispersing member 24 includes a mounting base and force dispersing sub-element 242, one end of the force dispersing sub-element 242 being secured to a side of the mounting base facing the shell-shaped appliance and the other end of the force dispersing sub-element being adapted to be fixedly coupled to the shell-shaped appliance 10. Specifically, one end of the force spreading sub-element 242 is fixed to the side of the mounting base facing the shell-shaped dental appliance, and the other end of the force spreading sub-element 242 is used for fixed connection with the shell-shaped dental appliance 10. The sum of the areas of the fixed connection of the force spreading sub-element 242 to the shell-shaped dental appliance 10 is greater than the conventional installation area. Since the sum of the areas of the force distribution sub-element 242 and the shell-shaped dental appliance 10, which are fixedly connected, is greater than the conventional installation area, the distribution of the forces generated when being pulled onto the shell-shaped dental appliance can be achieved by the force distribution sub-element 242. Further, the force generated when the pulling part is pulled is dispersed to the shell-shaped dental appliance 10 by the one or more force dispersion sub-members 242, which corresponds to the surface dispersion of the mounting base part, and the number of force dispersion sub-members can be adaptively determined according to the magnitude of the force, thereby achieving the reasonable distribution of the force dispersion sub-members and achieving the best and most reasonable force dispersion effect.

In the above embodiment, the force dispersing sub-members are provided and connected to the shell-shaped orthodontic appliance through the force dispersing sub-members to disperse the force generated during traction to the shell-shaped orthodontic appliance, and the number of the force dispersing sub-members can be flexibly adjusted, so that the technical effect of flexibly adjusting the force dispersed to the surface of the shell-shaped orthodontic appliance is achieved. The force generated during traction is dispersed to the shell-shaped dental appliance under the combined action of the force dispersing sub-elements, and the sum of the areas of the force dispersing sub-elements fixedly connected with the shell-shaped dental appliance is larger than the conventional installation area, so that compared with the conventional installation area, the force generated by traction can be better dispersed to the shell-shaped dental appliance by the force dispersing sub-elements, and the problem of deformation or fracture caused by over-concentration of the force on the shell-shaped dental appliance is solved.

With continued reference to fig. 10, in one embodiment, the force distributing sub-member 242 is a plurality of connectors, and the force distributing sub-member 242 is integrally formed with the mounting base or the connectors are fixedly attached to a side of the mounting base facing the shell-shaped dental appliance 10. In the above embodiment, the force dispersing sub-element 242 and the mounting base are integrally formed, so that the connection stability of the force dispersing sub-element and the mounting base can be improved, the process flow can be reduced, and the preparation efficiency of the traction member can be improved.

In another embodiment, the force distributing sub-member is a plurality of connecting bodies, the force distributing sub-member and the mounting base are separately formed, and the connecting bodies are fixedly connected to a surface of the mounting base facing the shell-shaped dental appliance. In the above embodiment, power dispersion sub-piece and installation base portion independent shaping respectively to carry out the assembly between them through fixed connection's mode, can improve the flexibility of assembly, can rationally select the power dispersion sub-piece that needs the assembly according to specific demand of correcting in the scene is rescued to the difference, if can the adaptability select the power dispersion sub-piece that corresponds the model and correspond quantity, and then realize the best power dispersion effect through the best assembly scheme, finally realize the best effect of correcting.

Referring to fig. 11, the force spreading sub-member 242 is a plurality of connecting bodies, each of which is a post having one end fixed to a side of the mounting base facing the shell-shaped orthodontic appliance and the other end fixedly connected to the shell-shaped orthodontic appliance. Specifically, when the force-dispersing sub-member is integrally formed with the mounting base, the connecting body is formed by the mounting base projecting outward toward a face of the shell-like dental appliance. When the force dispersing sub-pieces are independent components, the force dispersing components can be components with different types and different shapes, and then the corresponding types of force dispersing components can be matched in a self-adaptive mode according to different correction requirements. More specifically, the force spreading sub-element 242 may be a cylinder, and may specifically be a cylinder or a prism.

In one embodiment, the force distributing sub-members are regularly or irregularly distributed on the side of the mounting base facing the shell-shaped dental appliance such that when the pulling portion is pulled, the force distributing sub-members distribute the force generated by the pulling substantially evenly to the shell-shaped dental appliance. As shown in fig. 13, when the mounting base portion of the force dispersing member 24 has an elliptical shape, the force dispersing sub-members may be irregularly distributed on the side of the mounting base portion facing the shell-shaped dental appliance. As shown in fig. 14, when the mounting base portion of the force dispersing member 24 has a rectangular shape, the force dispersing sub-pieces may be regularly distributed on a side of the mounting base portion facing the shell-shaped dental appliance. In this embodiment, can set up or adjust the distribution state of power dispersion subelement on the installation basal portion according to correcting the demand in a flexible way, and then can realize more rationally will pull the power dispersion that produces to shell form tooth unscrambler, solve the deformation or the fracture problem that the power too concentrates on the shell form tooth unscrambler and lead to.

The present application further provides a shell-shaped dental appliance comprising an appliance body and a traction device for a shell-shaped dental appliance as described in any of the above embodiments, the traction device being fixedly connected to the appliance body.

In one embodiment, an orthotic body includes a traction device mounting region having a stiffness greater than a stiffness of other regions of the orthotic body other than the traction device mounting region.

Referring to fig. 8, in one embodiment, the area stiffness of the draft gear mounting area 11 is greater than the stiffness at other non-draft gear mounting area locations. In this embodiment, the rigidity of the traction device mounting region is set to be higher than the rigidity of other regions of the appliance body except the traction device mounting region, when the traction device generates force, the deformation of the traction device mounting region can be reduced, and the traction device mounting region and the mounting region are always in a connection relation of fitting so as to ensure the effective contact area between the traction device mounting region and the mounting region, and finally the traction force generated during traction is dispersed to the shell-shaped dental appliance, so that the problem of undesirable deformation or fracture of the shell-shaped dental appliance is solved.

In one embodiment, the number of layers of the membrane in the traction device mounting area is greater than the number of layers of the membrane in other areas of the orthotic body than the traction device mounting area. In this embodiment, the number of layers of the membrane at the position of the installation region of the traction device is increased to enhance the rigidity at the position, and further, undesired deformation of the region when being pulled is avoided or reduced, so that the effective contact area between the installation region of the traction device and the installation region is increased, and the force generated during pulling is dispersed to the shell-shaped dental appliance, so that the problem of undesired deformation or breakage of the shell-shaped dental appliance is solved.

In one embodiment, the elastic modulus of the outermost membrane of the traction device mounting region is greater than the elastic modulus of the outermost membrane of the other regions of the orthotic body except the traction device mounting region. In this embodiment, the elastic modulus of the outermost membrane at the position of the installation area of the traction device is set to be greater than the elastic modulus of the other areas on the appliance body at the outer membrane, so that the rigidity of the position of the installation area of the traction device can be improved, and further, the undesirable deformation of the area when the area is pulled is avoided or reduced, so that the effective contact area between the installation area of the traction device and the installation area is improved, the force generated during the pulling is dispersed to the shell-shaped appliance, and the problem of the undesirable deformation or the fracture of the shell-shaped appliance is solved.

Referring to fig. 2 and 8, in one embodiment, the thickness of the membrane in the traction device mounting area is greater than the thickness of the membrane in areas of the orthotic body other than the traction device mounting area. In some embodiments of the present invention, the shell-shaped dental appliance 10 has a non-uniform thickness configuration. Specifically, the thickness of the traction device fitting region 11 on the shell-shaped dental appliance 10 is preferably larger than the thickness of the shell-shaped dental appliance 10 except the traction device fitting region 11, and the thickness of the traction device fitting region 11 is preferably 0.5 to 3.0 mm. By increasing the local thickness of the traction device mounting region 11, it is possible to increase the strength of the traction device mounting region 11 and increase the contact area with the mounting portion 23 of the traction device 20, not only to prevent deformation of the traction device mounting region 11 when the traction device mounting region 11 transmits a force generated when being pulled, but also to allow a sufficient contact area to be provided when the traction device mounting region 11 and the traction device 20 are in contact with each other, thereby reducing the traction force generated when being pulled to be dispersed to the shell-shaped dental appliance, while also eliminating or partially eliminating undesired deformation of the shell-shaped dental appliance by the increase and providing a force sufficient to gradually change the tooth 100 from the initial position to the target correction position.

In the above embodiment, the thickness of the diaphragm in the traction device mounting region is larger than the thickness of the diaphragm at the other non-traction mounting region, and the greater the thickness of the diaphragm, the smaller the elastic deformation of the shell-shaped dental appliance, so that the rigidity of the shell-shaped dental appliance in the local region (traction device mounting region) can be increased by increasing the thickness of the diaphragm in the traction device mounting region, thereby reducing the deformation in the local region. Specifically, the elasticity of the position and the rigidity of the position are reduced by increasing the thickness of the membrane at the position of the installation area of the traction device, and further, the unexpected deformation of the area when the area is pulled is avoided or reduced, so that the effective contact area between the installation area of the traction device and the installation part is improved, the force generated when the traction device is pulled is dispersed to the shell-shaped dental appliance, and the problem of the unexpected deformation or fracture of the shell-shaped dental appliance is solved.

Further preferably, the modulus of elasticity of the membrane material of the traction device mounting region is greater than the modulus of elasticity of the membrane material of regions of the orthosis body other than the traction device mounting region. Specifically, the elastic modulus of the diaphragm material of the installation area of the traction device is greater than that of the diaphragm material at the position of other non-traction installation areas, and the shell-shaped dental appliance is less prone to elastic deformation as the elastic modulus is larger, so that the strength of the traction installation area is improved, the influence of the force generated when the traction part is pulled on the traction installation area is reduced, and the correction effect is improved. The rigidity of the shell-shaped dental appliance in a local area (traction device mounting area) can be increased by increasing the material rigidity of the traction device mounting area, thereby reducing the deformation in the local area. In the above embodiment, the elastic modulus of the diaphragm material of the traction device mounting region is greater than the elastic modulus of the diaphragm material of other regions on the appliance body, so that the rigidity of the traction device mounting region can be improved, and further, the undesirable deformation of the region when the region is pulled can be avoided or reduced, so that the effective contact area between the traction device mounting region and the mounting region can be improved, the force generated during pulling can be dispersed to the shell-shaped appliance, and the problem of the undesirable deformation or fracture of the shell-shaped appliance can be solved.

Referring specifically to fig. 2, 3, 6, 9 and 11, in one embodiment, the traction device mounting region is provided on an outer surface of the appliance body, and the force distributing member is coupled to the outer surface, wherein the mounting portion distributes a force generated by traction to the shell-shaped dental appliance through the force distributing member when the traction portion is pulled.

Referring specifically to fig. 15, in one embodiment, the traction device mounting area is provided on an inner surface of an appliance body to which the force distributing member is coupled, wherein when the traction portion is pulled and generates traction force, the traction force is distributed to the shell-shaped dental appliance by the traction force distributing structure. Specifically, an opening may be prepared in the shell-shaped dental appliance, and the fitting portion 243 connects the connecting portion 22 and the force dispersing member 24 through the prepared opening. Wherein the connection means may include a screw connection, a rivet welding, etc., and is not limited herein.

The present application also provides a shell-shaped dental appliance system comprising a plurality of shell-shaped dental appliances, at least one of the plurality of shell-shaped dental appliances being a shell-shaped dental appliance as described in any of the embodiments above.

The present application further provides a set of shell-shaped dental appliances comprising an upper jaw shell-shaped dental appliance and a lower jaw shell-shaped dental appliance, the upper jaw shell-shaped dental appliance comprising an appliance body for encasing at least a portion of upper jaw teeth and the lower jaw shell-shaped dental appliance comprising an appliance body for encasing at least a portion of lower jaw teeth, the upper jaw shell-shaped dental appliance and/or the lower jaw shell-shaped dental appliance being a shell-shaped dental appliance as described in any of the embodiments above.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.