阅读说明：本技术 数字化3d打印软弹性护齿器的制造方法 (Manufacturing method of digital 3D printing soft elastic tooth protector ) 是由 张旻 闫鹏宇 刘艳丽 王迎捷 陈骥 张淞柏 丰帆 于 2021-01-12 设计创作，主要内容包括：本发明公开了一种数字化3D打印软弹性护齿器的制造方法,步骤1：获取使用者的口内光学印模和牙列间关系；步骤2：根据所述使用者的口内光学印模和牙列间关系建立数字化模型；步骤3：通过3D打印机对所述数字化模型进行打印,获得护齿器。本发明通过高精度光学印模技术(即数字化口扫)采集使用者牙列数据,通过电子面弓及虚拟合架实现使用者上下颌开闭口运动的计算机模拟,并以上述两项步骤为基础导出上下颌第一磨牙打开适当距离的数字化模型,在工业级CAD软件中对护齿器模型进行构建并最终使用生物相容性软弹性3D打印材料及高精度3D打印技术进行护齿器实体化。(The invention discloses a manufacturing method of a digital 3D printing soft elastic tooth protector, which comprises the following steps of: acquiring a relationship between an intraoral optical impression and dentition of a user; step 2: establishing a digital model based on the relationship between the intraoral optical impression and dentition of the user; and step 3: and printing the digital model through a 3D printer to obtain the tooth protector. The invention collects the dentition data of a user by a high-precision optical impression technology (namely digital oral scanning), realizes the computer simulation of the opening and closing movement of the upper jaw and the lower jaw of the user by an electronic face bow and a virtual frame, derives a digital model of opening a proper distance of the first upper and lower jaws of a molar on the basis of the two steps, constructs a tooth protector model in industrial CAD software and finally carries out the materialization of the tooth protector by using a biocompatible soft elastic 3D printing material and a high-precision 3D printing technology.)

1. A manufacturing method of a digital 3D printing soft elastic tooth protector is characterized by comprising the following steps:

step 1: acquiring a relationship between an intraoral optical impression and dentition of a user;

step 2: establishing a digital model based on the relationship between the intraoral optical impression and dentition of the user;

and step 3: and printing the digital model through a 3D printer to obtain the tooth protector.

2. The method for manufacturing a digital 3D printing soft elastic tooth protector according to claim 1, wherein the step 1 of obtaining an intraoral optical impression of the user comprises: and acquiring the mucosa morphology from the upper and lower jaw dentition, the maxillary labial and buccal side edge to the retrolabial side mucosa fold line and the palate side edge of the user by a digital intraoral scanner, and determining the digital model of the upper and lower jaw dentition according to the mucosa morphology.

3. The manufacturing method of the digital 3D printing soft elastic tooth protector as claimed in claim 1 or 2, wherein the inter-dentition relationship of the user is obtained in the step 1, and specifically comprises the relative position relationship between the upper jaw and the condylar process and the mandibular movement data of the user.

4. The manufacturing method of the digital 3D printing soft elastic tooth protector according to claim 3, wherein the step 1 of obtaining the relative position relationship between the maxilla and the condylar of the user comprises: determining the position relation between the maxillary dentition and the maxillary tray of the user through the maxillary tray; and fixing the positioner on the maxillary tray, determining the positions of the maxillary dentition and the condyles through the positioner, and acquiring the relative position relation between the maxilla and the condyles of the user.

5. The manufacturing method of the digital 3D printing soft elastic tooth protector according to claim 4, wherein the mandibular movement data obtained in step 1 are specifically: the mandible is fixed by temporary crown materials or flowing resin and inserted on the mandible array, and corresponding movement data are respectively obtained by the mandible of a user moving to the maximum opening position, performing left and right lateral movement and performing protrusion movement.

6. The method for manufacturing a digital 3D printing soft elastic tooth protector according to claim 5, wherein the step 2 is to build a digital model according to the relationship between the user's intraoral optical impression and dentition, and is realized by the following steps:

step 21: filling the dents into the digital maxillary dentition model;

step 22: determining the position relation of the upper jaw and the lower jaw according to the upper jaw dentition digital model and the lower jaw dentition digital model filled with the dents, and obtaining the upper jaw dentition digital model and the lower jaw dentition digital model for determining the position relation of the upper jaw and the lower jaw;

step 23: constructing a contact part between the digital model of the upper jaw dentition and the human body;

step 24: constructing the outer side surfaces of the digital models of the upper jaw dentition and the lower jaw dentition;

step 24: filling and perfecting the rest parts of the digital models of the upper and lower jaw dentitions to obtain the digital model of the tooth protector.

7. The manufacturing method of the digital 3D printing soft elastic tooth protector according to claim 6, wherein the digital models of the upper and lower jaw dentition for determining the position relationship of the upper and lower jaws are obtained by determining the position relationship of the upper and lower jaws according to the digitalized models of the upper and lower jaw dentition after filling the dents, and specifically: and opening the upper and lower jaws of the filled inverted concave digital upper jaw model and the lower jaw digital lower jaw model by 2mm, and determining the position relation of the upper and lower jaws.

8. The manufacturing method of the digital 3D printing soft elastic tooth protector according to claim 7, wherein the parts of the digital model of the upper and lower jaw dentition, which are in contact with the human body, are constructed by: and (3) intercepting model data of the digital model of the maxillary dentition in the digital model of the maxillary dentition filled with the undercut, wherein the model data of the digital model of the maxillary dentition is 2mm in a retrocrease line of a mucous membrane on the labial side and 10mm above the margin on the palatal side, and intercepting model data of the digital model of the mandibular dentition filled with the undercut, which is above the undercut along the mandibular dentition.

9. The manufacturing method of the digital 3D printing soft elastic tooth protector as claimed in claim 8, wherein the constructing of the lateral side of the digital model of the upper and lower jaw dentition specifically comprises constructing the lateral side of the labial side and constructing the lateral side of the lingual palatal side; the construction of the outer side surface of the labial and buccal sides specifically comprises the following steps: constructing a curve at a position 1/3 which is positioned in the maxillary dentition teeth in the digitized maxillary dentition model and is 3-4mm away from the dentition axial outer side, constructing a corresponding curve at a position 2-3mm away from the dentition axial direction at the edge of the digitized maxillary dentition model and the mandibular dentition model, and constructing a curved surface which is the outer side surface of the labial and buccal sides according to the three curves; the construction of the lateral outer side surface of the tongue palate specifically comprises the following steps: and (3) constructing a curve at a position, which is located in the maxillary dentition teeth and is 1/3 dentitions away from the inner side of the dentition axial direction in the maxillary dentition digital model, constructing a curve at a position, which is located at the edge of the mandibular dentition digital model and is 2-3mm away from the inner side of the dentition axial direction, and constructing a curved surface, namely the tongue palate side outer side surface, according to the two curves and the side edge line of the maxillary dentition digital model.

10. The manufacturing method of the digital 3D printing soft elastic tooth protector according to claim 9, wherein the filling and perfecting are performed on the rest of the digital models of the upper and lower jaw dentition to obtain the digital model of the tooth protector, specifically: and filling the inside of the outer lateral surface and the space between the outer lateral surface and the tissue surface in the digital models of the upper and lower jaw dentitions, and performing fairing treatment to obtain the digital model of the tooth protector.

Technical Field

The invention belongs to the field of oral cavity digitization, and particularly relates to a manufacturing method of a digital 3D printing soft elastic tooth protector.

Background

The original manufacturing technology of the customized tooth protector is a vacuum heating and film pressing technology, and the simple process is that a diaphragm is heated to a specific temperature on a maxillary dentition plaster model filled with an inverted concave part and is in a vacuum condition, and pressure is applied to a thermal deformation diaphragm to enable the thermal deformation diaphragm to deform and be attached to the plaster model, so that the purpose of obtaining the tooth protector closely related to teeth and mucosa in the oral cavity is achieved.

The technical defect is that stable occlusion cannot be formed between the tooth protector and the mandibular dentition, the tooth protector can be put into use after being adjusted and ground by a stomacher, and the undercut depth of the plaster model is manually controlled by the stomacher during preparation, so that higher requirements are provided for the experience of the stomacher and the repeatability is not strong; the manufacturing process is complicated, and a user needs to take a mold, re-diagnose, adjust and grind the occlusal surface and go to and fro an oral clinic for a plurality of times to obtain a finished product; the thicknesses of different parts of the gear protector are difficult to reach the optimal thickness for exerting the protection performance of the gear protector material, and the fact that related documents for improving the film pressing method of the gear protector in international journals are frequently found is proved; the manufacturing process is relatively original, and the risk of falling off exists when the finally formed tooth protector and the retention force of human tissues are not good due to the fact that the precision is difficult to control; another problem that results from the difficulty of controlling accuracy is that the fit of the guard to the anatomy is not stable, and literature indicates that a guard with a poor fit will perform less well than a guard with a good fit. In summary, the traditional customized tooth protector has high requirements on experience of specialized doctors, poor repeatability, complex manufacturing process, weak retention force and difficult control of thickness and fitting degree, and the tooth protector manufactured by the method has unsatisfactory protection performance and comfort.

Disclosure of Invention

In view of the above, the main object of the present invention is to provide a method for manufacturing a digital 3D printing soft elastic tooth protector.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the embodiment of the invention provides a manufacturing method of a digital 3D printing soft elastic tooth protector, which is realized by the following steps:

step 1: acquiring a relationship between an intraoral optical impression and dentition of a user;

step 2: establishing a digital model based on the relationship between the intraoral optical impression and dentition of the user;

and step 3: and printing the digital model through a 3D printer to obtain the tooth protector.

In the above scheme, the step 1 of obtaining an intra-oral optical impression of the user specifically includes: and acquiring the mucosa morphology from the upper and lower jaw dentition, the maxillary labial and buccal side edge to the retrolabial side mucosa fold line and the palate side edge of the user by a digital intraoral scanner, and determining the digital model of the upper and lower jaw dentition according to the mucosa morphology.

In the above scheme, the inter-dentition relationship of the user obtained in step 1 specifically includes the relative position relationship between the maxilla and the condyles of the user and the mandibular movement data.

In the above scheme, the obtaining of the relative position relationship between the maxilla and the condyle of the user in step 1 specifically includes: determining the position relation between the maxillary dentition and the maxillary tray of the user through the maxillary tray; and fixing the positioner on the maxillary tray, determining the positions of the maxillary dentition and the condyles through the positioner, and acquiring the relative position relation between the maxilla and the condyles of the user.

In the above scheme, the acquiring mandible movement data in step 1 specifically includes: the mandible is fixed by temporary crown materials or flowing resin and inserted on the mandible array, and corresponding movement data are respectively obtained by the mandible of a user moving to the maximum opening position, performing left and right lateral movement and performing protrusion movement.

In the above scheme, the step 2 of establishing a digital model according to the relationship between the intraoral optical impression of the user and the dentition is specifically realized by the following steps:

step 21: filling the dents into the digital maxillary dentition model;

step 22: determining the position relation of the upper jaw and the lower jaw according to the upper jaw dentition digital model and the lower jaw dentition digital model filled with the dents, and obtaining the upper jaw dentition digital model and the lower jaw dentition digital model for determining the position relation of the upper jaw and the lower jaw;

step 23: constructing a contact part between the digital model of the upper jaw dentition and the human body;

step 24: constructing the outer side surfaces of the digital models of the upper jaw dentition and the lower jaw dentition;

step 24: filling and perfecting the rest parts of the digital models of the upper and lower jaw dentitions to obtain the digital model of the tooth protector.

In the above scheme, the determining the position relationship of the upper jaw and the lower jaw according to the digitalized model of the upper jaw dentition and the digitalized model of the lower jaw dentition after filling the concavity to obtain the digitalized model of the upper jaw dentition and the lower jaw dentition determining the position relationship of the upper jaw and the lower jaw specifically comprises: and opening the upper and lower jaws of the filled inverted concave digital upper jaw model and the lower jaw digital lower jaw model by 2mm, and determining the position relation of the upper and lower jaws.

In the above scheme, the construction of the contact part with the human body in the digital model of the upper and lower jaw dentition specifically comprises: and (3) intercepting model data of the digital model of the maxillary dentition in the digital model of the maxillary dentition filled with the undercut, wherein the model data of the digital model of the maxillary dentition is 2mm in a retrocrease line of a mucous membrane on the labial side and 10mm above the margin on the palatal side, and intercepting model data of the digital model of the mandibular dentition filled with the undercut, which is above the undercut along the mandibular dentition.

In the scheme, the constructing of the lateral surfaces in the digital model of the upper and lower jaw dentitions specifically comprises constructing the lateral surface on the labial and buccal sides and constructing the lateral surface on the lingual and palatal sides; the construction of the outer side surface of the labial and buccal sides specifically comprises the following steps: constructing a curve at a position 1/3 which is positioned in the maxillary dentition teeth in the digitized maxillary dentition model and is 3-4mm away from the dentition axial outer side, constructing a corresponding curve at a position 2-3mm away from the dentition axial direction at the edge of the digitized maxillary dentition model and the mandibular dentition model, and constructing a curved surface which is the outer side surface of the labial and buccal sides according to the three curves; the construction of the lateral outer side surface of the tongue palate specifically comprises the following steps: and (3) constructing a curve at a position, which is located in the maxillary dentition teeth and is 1/3 dentitions away from the inner side of the dentition axial direction in the maxillary dentition digital model, constructing a curve at a position, which is located at the edge of the mandibular dentition digital model and is 2-3mm away from the inner side of the dentition axial direction, and constructing a curved surface, namely the tongue palate side outer side surface, according to the two curves and the side edge line of the maxillary dentition digital model.

In the above scheme, the filling and perfecting of the rest parts of the digital models of the upper and lower jaw dentition to obtain the digital model of the tooth protector specifically comprises: and filling the inside of the outer lateral surface and the space between the outer lateral surface and the tissue surface in the digital models of the upper and lower jaw dentitions, and performing fairing treatment to obtain the digital model of the tooth protector.

Compared with the prior art, the method has the advantages that the dentition data of a user are collected through a high-precision optical impression technology (namely digital oral scanning), the computer simulation of the opening and closing movement of the upper jaw and the lower jaw of the user is realized through an electronic face bow and a virtual closing frame, the digital model of the opening of the first upper and lower jaws at a proper distance is derived on the basis of the two steps, the tooth protector model is constructed in industrial CAD software, and finally the tooth protector is materialized by using a biocompatible soft elastic 3D printing material and a high-precision 3D printing technology.

Drawings

FIG. 1 is a schematic view of the present invention for taking an intraoral optical impression of a user;

FIG. 2 is a schematic diagram of the digitized models of maxillary dentition and mandibular dentition after filling the concavities in accordance with the present invention;

FIG. 3 is a diagram of a digitized model of the maxillary dentition after filling the concavities in accordance with the present invention;

FIG. 4 is a schematic diagram of the present invention showing the model of the digitized maxillary dentition model after filling the concavities, 2mm inside the retrocrease line of the labial-buccal mucosa and 10mm above the palate edge;

FIG. 5 is a diagram of the present invention showing the palatal lateral outer surface being a curved surface constructed according to two curves and the lateral edge line of the digitized maxillary dentition model;

fig. 6 is a front view of the present invention after filling the inside of the lateral surfaces and between the lateral surfaces and the tissue surface of the digitized models of the maxillary and mandibular dentitions;

fig. 7 is a side view of the present invention after filling in the lateral surface and between the lateral surface and the tissue surface in the digitized model of the maxillary and mandibular dentition;

FIG. 8 is a top view of a digitized model of the jaw dentition of the present invention;

fig. 9 is a schematic view of the tooth protector of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a manufacturing method of a digital 3D printing soft elastic tooth protector, which is realized by the following steps:

step 1: acquiring an intra-oral optical impression of a user;

specifically, as shown in fig. 1, the digital intra-oral scanner obtains the mucosa morphology from edge of upper and lower jaw dentition, the maxillary labial-buccal side to the retrolabial-buccal side mucosa fold line and edge of palate side by 15mm in the mouth of the user, and determines the digital model of the upper and lower jaw dentition according to the mucosa morphology.

Step 2: acquiring the interdental relation of the user;

obtaining a backward contact position of a user, placing an impeller at the front teeth when the user retreats the contact position, adjusting the number of blades of the impeller to separate the first molar teeth by 2mm, taking the relative position relation of the rear teeth by using light silicone rubber, and verifying the thickness by using a thickness measuring ruler.

And step 3: establishing a digital model based on the relationship between the intraoral optical impression and dentition of the user;

the method is realized by the following steps:

step 31: filling a concave of the digital maxillary dentition model, wherein the depth of the concave is 1 mm;

step 32: as shown in FIG. 2, the interdental relationship of the entity is converted into data using an intraoral scanner. Aligning and righting the upper and lower jaw dentitions in imageware according to the digitalized model of the upper jaw dentition, the digitalized model of the lower jaw dentition and the interdental relationship after filling the dents, and removing the interdental relationship in the data format after finishing aligning and righting.

Step 33: constructing a contact part between the digital model of the upper jaw dentition and the human body;

specifically, as shown in fig. 3 and 4, model data of the digitized model of maxillary dentition after filling the concavity, which is 2mm inside the retroversion line of the mucous membrane on the labial-buccal side and 10mm above the margin of the palatal side, are cut, and model data of the digitized model of mandibular dentition after filling the concavity, which is more than the concavity along the mandibular dentition, are cut.

Step 34: constructing the outer side surfaces of the digital models of the upper jaw dentition and the lower jaw dentition;

specifically, the method comprises the steps of constructing the outer side surface of the labial and buccal side and constructing the outer side surface of the tongue and palate side;

constructing a curve at a position 1/3 which is positioned in the maxillary dentition teeth in the digitized maxillary dentition model and is 3-4mm away from the dentition axial outer side, constructing a corresponding curve at a position 2-3mm away from the dentition axial direction at the edge of the digitized maxillary dentition model and the mandibular dentition model, and constructing a curved surface which is the outer side surface of the labial and buccal sides according to the three curves; the purpose is to determine the thickness of the front tooth lip side of the tooth protector, so that the thickness is matched with the protection performance of the tooth protector.

As shown in fig. 5, a curve is constructed at 1/3 tooth rows in the maxillary tooth row digitalized model, which are 1-3mm away from the inner side of the tooth row in the axial direction, and a curve is constructed at the edge of the mandibular tooth row digitalized model, which is 2-3mm away from the inner side of the tooth row in the axial direction, and the curve constructed according to the two curves and the side edge line of the maxillary tooth row digitalized model is the external side surface of the tongue and palate side; aims to make the edge of the contacting part of the tooth protector and the palate disappear gradually, thereby reducing the interference of the tooth protector when the tongue body moves.

Step 35: filling and perfecting the rest parts of the digital models of the upper and lower jaw dentitions to obtain the digital model of the tooth protector.

Specifically, as shown in fig. 6, 7 and 8, the digital model of the tooth protector is obtained by filling the inside of the lateral surface and the space between the lateral surface and the tissue surface in the digital models of the upper and lower jaw dentitions and by smoothing the filling.

And 4, step 4: as shown in fig. 9, the digitized model is printed by a 3D printer to obtain the tooth protector.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.