CN112472331A - Manufacturing method of personalized lingual orthodontic appliance - Google Patents
Manufacturing method of personalized lingual orthodontic appliance Download PDFInfo
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- CN112472331A CN112472331A CN202011313112.4A CN202011313112A CN112472331A CN 112472331 A CN112472331 A CN 112472331A CN 202011313112 A CN202011313112 A CN 202011313112A CN 112472331 A CN112472331 A CN 112472331A
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- bracket
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- bottom plate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
- A61C7/28—Securing arch wire to bracket
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
Abstract
The invention discloses a method for manufacturing a personalized orthodontic appliance for the tongue side, which comprises the following steps of (1) taking a digital dental model of a patient, and arranging teeth on the digital dental model to obtain a dentition model in an ideal normal dentition shape; (2) designing a continuous and smooth ribbon-shaped wire according to the dentition shape of the dentition model; (3) opening the die by utilizing a die manufacturing process to manufacture the bracket body; (4) designing a personalized lingual bracket bottom plate model according to the position relationship between the bracket body and the lingual side of the tooth and the shape of the lingual side of the tooth; (5) welding the bracket body and the bracket bottom plate into an integral bracket; (6) the bracket and the ribbon wire are applied to clinical orthodontics. According to the invention, the bracket body is prepared through a die process, the non-standard bracket bottom plate is prepared through a 3D printing technology, and then the bracket bottom plate and the bracket body are welded, so that the accuracy of the bracket groove is improved, especially the right angle in the groove is convenient to install an arch wire, the stress of teeth is close to an ideal state, and the tooth movement can be controlled in a three-dimensional direction.
Description
Technical Field
The invention relates to the field of oral orthodontics, in particular to a manufacturing method of a personalized lingual orthodontic appliance.
Background
As orthodontic patients demand increasingly higher aesthetics of appliances, invisible correction has become increasingly of interest to orthodontists. Therefore, several invisible orthodontic technologies, such as a ceramic bracket appliance, a transparent braces appliance, a lingual appliance and the like, are developed, but the appliances which can be truly invisible and can treat various malocclusion deformities are only lingual appliances. In more than ten years, the tongue correction technology has become a mature and efficient fixed correction technology through a great deal of clinical practice and exploration by advocates of the tongue correction technology, and is also a popular technology in the clinical field of oral orthodontics. However, the accuracy of the bonding of the lingual appliance, the accuracy of the bending of the archwire, and the accuracy of the manufacture of the lingual appliance itself all directly affect the effectiveness of the appliance.
At present, the manufacturing method of the lingual appliance is generally completed by the following methods: (1) taking an original dental model of a patient, scanning the original dental model to obtain a digital dental model, and arranging teeth of the digital dental model in combination with the specific condition of teeth of the patient so as to obtain a dentition model which is suitable for the ideal normal dentition shape of the patient; (2) designing a personalized bracket according to the lingual side of teeth of the dentition model, wherein the bracket groove of the anterior teeth faces towards the (occlusal) side, the bracket groove of the posterior teeth faces towards the lingual side, and the bracket is integrally formed by adopting a 3D printing technology or a stamping technology; (3) then arch wire segments are designed in the groove, then a plurality of arch wire segments are connected into an integral arch wire, and then the arch wire is bent according to a model to prepare a finished product as shown in figure 1.
The lingual appliance prepared by the above method has the following problems: (1) the groove directions of the brackets in the front tooth area and the rear tooth area are different, particularly the groove direction is changed at the joint of the front tooth area and the rear tooth area, and the arch wire is also bent at the position, so that the arch wire is difficult to mount and take and often has the bracket falling phenomenon in the process of mounting or taking and putting the arch wire; (2) the common lingual arch wire is a mushroom-shaped arch wire, a step curve is similar between a cuspid and a first premolar, and in clinical treatment, if the anterior teeth of a patient are scattered, the length of the anterior tooth section of a subsequent arch wire is often insufficient and the anterior tooth section cannot be in place; in addition, the anterior tooth segment of the current tongue side square thread is a broken line and is not similar to the arc shape of the labial side, and the position of the tooth is abnormal because the arch wire can not be completely positioned according to the designed position in clinic or slides in the left and right directions after being positioned; (3) the bracket is integrally manufactured by a 3D printing technology and CAD/CAM, but due to the technical problems and the limitation of the performance of printing materials, the size precision of the groove is low, and the influence on the clinical treatment effect is large; (4) because the space of the lingual side of the tooth is insufficient, the vertical position of the bracket groove is limited, and the flat guide effect of the lingual side bracket causes the anterior tooth overlay of the lingual side orthodontic patient after treatment to be small, and normal incisal guidance and cuspid guidance cannot be formed. Meanwhile, because the traditional curve exists between the tongue side arch wire cuspid and the first premolar, the anterior tooth overlapping can not be improved by bending the step curve.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a manufacturing method of a personalized lingual orthodontic appliance, the lingual orthodontic appliance prepared by the method has high precision, a lingual arch wire is convenient to mount, pick and place, and the orthodontic treatment effect is stable.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of manufacturing a personalized lingual orthodontic appliance, comprising an orthodontic appliance manufactured by the sequential steps of:
(1) taking an original dental model of a patient and scanning the original dental model or directly scanning the original dental model from the mouth of the patient to obtain a digital dental model, and arranging teeth of the digital dental model according to the specific situation of the teeth of the patient so as to obtain a dentition model which is suitable for the ideal normal dentition shape of the patient;
(2) designing a personalized arch wire according to the dentition shape of the dentition model, and bending the personalized arch wire, wherein the personalized arch wire is a continuous and smooth ribbon wire;
(3) placing a three-dimensional bracket body model corresponding to each tooth on the ribbon wire, and opening the die by utilizing a die manufacturing process to manufacture a bracket body;
(4) designing a personalized lingual bracket bottom plate model according to the position relationship between the bracket body and the lingual side of the tooth and the shape of the lingual side of the tooth, and manufacturing the bracket bottom plate according to the bracket bottom plate model by adopting a 3D printing technology;
(5) welding the bracket body in the step (3) and the bracket bottom plate in the step (4) into an integral bracket;
(6) and (3) applying the bracket obtained in the step (5) and the personalized arch wire obtained in the step (2) to clinical orthodontics.
Furthermore, a positioning piece is arranged at the bottom of the bracket body, and a positioning groove matched with the positioning piece is formed in the bracket bottom plate.
Furthermore, the positioning piece is a positioning body formed by irregular cross-sectional shapes.
Further, the groove openings of all the bracket bodies face the tongue side.
Further, an adduction bend is arranged on the arch wire between the cuspid and the premolar.
Compared with the prior art, the invention has the following beneficial effects:
(1) the bracket body of the standard component is prepared through a die process, the bracket base plate of the non-standard component is prepared through a 3D printing technology or a stamping technology, and the bracket base plate and the bracket body are welded together through a welding technology, so that the accuracy of the bracket groove is improved, particularly the inner right angle of the groove, the arch wire is convenient to install, the stress of the tooth after the arch wire is installed is close to an ideal state, and the tooth movement is controlled in the three-dimensional direction;
(2) the grooves of all the brackets face the tongue side and are matched with the banded arch wire, so that the installation and the taking and the placing are convenient, and the control of the arch wire on the movement of the teeth in the three-dimensional direction is not obviously influenced;
(3) the arch wire is in a straight-wire design, the distance between teeth and the arch wire is filled by the thickness of the bottom of the supporting groove, so that the arch wire is straight-wire, the arch wire is convenient to mount, the arch wire slightly slides left and right in the treatment process, the position of the teeth cannot be influenced, and the orthodontic effect is improved.
Drawings
FIG. 1 is a schematic diagram of a bracket structure of the prior art.
FIG. 2 is a schematic view of a bracket configuration of the present invention.
FIG. 3 is a cross-sectional view of a bracket of the present invention.
Fig. 4 and 5 are schematic views showing a bracket body and a bracket bottom plate in a separated state.
FIG. 6 is a schematic view of a welding element and a positioning element of the present invention.
FIG. 7 is a schematic view of the appliance of the present invention.
FIG. 8 is a schematic view of the appliance of the present invention.
FIG. 9 is a schematic view of a prior art method appliance.
The labels in the figure are: 10. a bracket; 11. a bracket body; 12. a bracket base plate; 13. a groove; 14. a connecting member; 15. connecting grooves; 16. a welding point; 20. an arch wire; 30. a tooth.
Detailed Description
Example 1
The embodiment provides a high-precision orthodontic bracket 10, which comprises a bracket bottom plate 12 and a bracket body 11, wherein the bracket body 11 adopts the high-precision bracket body 11 prepared by a die process, the die process is to open a die according to a model, and then a metal solution is led into the bracket body 11 manufactured by the die, as shown in fig. 1, the bracket body 11 in the prior art is a bracket body 11, corners of grooves 13 of the bracket body 11 are in arc transition, fig. 2-5 are the bracket body 11 provided by the embodiment, and corners of the grooves 13 of the bracket body 11 are right angles, so that an arch wire 20 can be conveniently and completely put in place, the stress of teeth 30 can reach an ideal state, the orthodontic time can be shortened, and the orthodontic effect can be improved.
In order to facilitate the industrial high-precision production of the bracket body 11, the bracket body 11 is designed as a standard component, that is, 2-3 standard components with fixed sizes can meet the orthodontic use of all teeth 30, in this embodiment, the bracket body 11 is further provided with a connecting component 14, the connecting component 14 is used for connecting the bracket body 11 and the bracket bottom plate 12 together for convenient welding, the bracket bottom plate 12 is provided with a connecting groove 15 matched with the connecting component 14, and the connecting component 14 is inserted into the connecting groove 15 and welded together by adopting a spot welding technology to form the bracket 10. The bracket bottom plate 12 can be designed into a personalized bracket bottom plate 12 according to the characteristics of each tooth 30, the thickness of the bracket bottom plate 12 and the position relationship between the tooth side and the arch wire are determined, the width and the height (the cross-sectional shape) of the bracket bottom plate 12 are the same as the tooth side, and the width and the height (the cross-sectional shape) are also related to the tongue and the lip when the bracket 10 is installed on the tongue side, so that the personalization of the teeth 30 can be met, and the precision of the bracket 10 is improved.
For the direction of slot 13 on the convenient discernment bracket body 11 during spot welding, can be in be equipped with the setting element on connecting piece 14 or in connecting groove 15, simultaneously, open on connecting groove 15 or the connecting piece 14 the constant head tank that matches with the setting element, as shown in fig. 4 and 5, when the setting element is located connecting piece 14, can be equipped with the body that a cross sectional area of integrated into one piece is less than connecting piece 14 on the arbitrary side of connecting piece 14, like triangle body, cylinder, square body etc. when the setting element is located connecting groove 15, can be in connecting groove 15 optional position but not including central point department of putting design a cross sectional area and be less than the body of connecting groove 15 bottom surface, as shown in fig. 6. It is also conceivable that the connecting element 14 itself is a body with a positioning function, such as a triangular body (not including an equilateral triangular body), or another irregular body.
Example 2
The method for manufacturing the personalized lingual orthodontic appliance provided by the embodiment is characterized by comprising the following steps of:
(1) the original dental model of the patient is taken and scanned or directly scanned intraorally to obtain a digital dental model, and the digital dental model is arranged according to the specific conditions of the teeth 30 of the patient, so that the dentition model which is suitable for the ideal normal dentition shape of the patient is obtained.
The original dental model copies the dentition in the mouth by using a professional silicon rubber material, then fills the plaster model with the superhard or zero-expansion plaster, and can prepare a plurality of pairs of plaster models according to the requirements of doctors.
Then a three-dimensional scanner is adopted to scan the plaster model (original dental model) to obtain a three-dimensional digital dental model, and the digital dental model is stored in a computer and can be edited and stored by drawing software.
Or directly scanning the intraoral dentition by using a three-dimensional scanner to obtain a three-dimensional digital dental model.
The tooth arrangement refers to that a doctor performs tooth arrangement correction according to the tooth 30 condition of a patient, the specific tooth arrangement process is determined by the doctor, and redundant description is not repeated in this embodiment. The practitioner's aligned dentition model is one that fits the ideal normal dentition shape of the patient.
(2) Designing a personalized arch wire 20 according to the dentition shape of the dentition model, and bending the personalized arch wire 20, wherein the personalized arch wire 20 is a continuous and smooth ribbon wire.
The shape of the arch wire 20 is similar to the dentition shape, and the arch wire 20 is arc-shaped as a whole, as shown in fig. 7, the main purpose of this embodiment is to design the arch wire 20 into a continuous smooth arc-shaped structure as a whole according to the dentition shape, and change the arch wire 20 with a bend in the prior art into a straightened arch wire 20, the bent arch wire is designed as shown in fig. 9, and the arch wire 20 of this embodiment adopts a ribbon wire, and the individualized ribbon wire is a continuous smooth arc-shaped ribbon wire designed according to the dentition shape after tooth arrangement, and can adopt nickel titanium material, stainless steel material, beta titanium alloy material and the like.
Further, according to the shape difference between the first premolar and the second canine of the patient, which results in the first premolar and the second canine being far from the position of the arch wire, the arch wire may be flexibly changed in this embodiment, and an adduction bend is provided between the canine and the premolar, as shown in fig. 8.
(3) The bracket body 11 corresponding to each tooth 30 is arranged on the ribbon-shaped wire, and the bracket body 11 is manufactured by a die manufacturing process.
The bracket body 11 of the embodiment is a standard bracket body 11 designed in advance, the standard bracket body 11 means that the shape and the size of the bracket body 11 are fixed, and the bracket body is not required to be specifically designed according to the condition of the teeth 30 of a patient, therefore, the bracket body 11 can be manufactured in batches by adopting a die process, the corner of the groove 13 of the bracket body 11 manufactured by adopting the die process is a right angle, the structure of the bracket body 11 is the same as that of the bracket body 11 provided in the embodiment 1, and the bracket body 11 of the embodiment provides 2-3 structures with different sizes so as to adapt to the teeth 30 with different sizes. In the specific design, the bracket body 11 with the groove 13 facing to the tongue side is adopted, and the grooves 13 of the bracket body 11 in the front tooth area and the rear tooth area are both facing to the tongue side.
(4) Designing a personalized lingual bracket bottom plate 12 according to the distance from the bracket body 11 to the lingual side of the tooth 30 and the lingual side of the tooth 30, and preparing the bracket bottom plate 12 by adopting a 3D printing technology or a stamping technology.
During design, the thickness of the bracket bottom plate 12 is related to the distance between the bracket body 11 and the teeth 30, the size of the area size of the bracket bottom plate 12 is related to the lingual side of the teeth 30, therefore, the bracket bottom plate 12 of each tooth 30 is individually designed, and is directly prepared according to the designed bracket bottom plate 12 model by adopting a 3D printing technology or a stamping technology, the specific structure of the bracket bottom plate 12 is the same as the structure of the bracket bottom plate 12 provided in embodiment 1, and the embodiment compensates the distance between the straight wire of the arch wire 20 and the bracket by increasing the thickness parameter of the bracket bottom plate 12.
(5) And (4) welding the bracket body 11 in the step (3) and the bracket bottom plate 12 in the step (4) into an integral bracket. The embodiment specifically adopts the spot welding technology to weld the bracket body 11 and the bracket bottom plate 12 together, because the bracket body 11 is a standard component in the embodiment, the bracket body 11 does not need to be identified, and only the direction of the groove 13 needs to be noticed during welding, therefore, positioning parts are arranged on the bracket body 11 and the bracket bottom plate 12 in the embodiment, and the positions and the structures of the positioning parts are specifically as shown in embodiment 1.
(6) And (3) applying the bracket obtained in the step (5) and the personalized arch wire 20 obtained in the step (2) to clinical orthodontics.
The manufactured personalized bracket is placed on the original dental model one by one, and the personalized bracket is manufactured by adopting a twice film pressing forming method. In order to realize the accuracy, rapidness and high efficiency of clinical bonding bracket, the manufactured personalized lingual bracket is placed on an original model one by one, and a pressed film type personalized tray is manufactured on a plaster model with the bracket; the manufactured personalized lingual orthodontic bracket and the personalized bonding tray are sent to clinic for indirect bonding by an orthodontist to perform orthodontic treatment. The embodiment can be used for manufacturing the personalized lingual appliance and also can be used for manufacturing the personalized labial appliance. .
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (5)
1. A method of manufacturing a personalized lingual orthodontic appliance, characterized in that it comprises an orthodontic appliance manufactured according to the following sequence of steps:
(1) taking an original dental model of a patient and scanning the original dental model or directly scanning the original dental model from the mouth of the patient to obtain a digital dental model, and arranging teeth of the digital dental model according to the specific situation of the teeth of the patient so as to obtain a dentition model which is suitable for the ideal normal dentition shape of the patient;
(2) designing a personalized arch wire according to the dentition shape of the dentition model, and bending the personalized arch wire, wherein the personalized arch wire is a continuous and smooth ribbon wire;
(3) placing a three-dimensional bracket body model corresponding to each tooth on the ribbon wire, and opening the die by utilizing a die manufacturing process to manufacture a bracket body;
(4) designing a personalized lingual bracket bottom plate model according to the position relationship between the bracket body and the lingual side of the tooth and the shape of the lingual side of the tooth, and manufacturing the bracket bottom plate according to the bracket bottom plate model by adopting a 3D printing technology;
(5) welding the bracket body in the step (3) and the bracket bottom plate in the step (4) into an integral bracket;
(6) and (3) applying the bracket obtained in the step (5) and the personalized arch wire obtained in the step (2) to clinical orthodontics.
2. The method of manufacturing a personalized orthodontic appliance of claim 1, wherein: the bottom of the bracket body is provided with a positioning piece, and a positioning groove matched with the positioning piece is formed in the bracket bottom plate.
3. The method of manufacturing a personalized orthodontic appliance of claim 2, wherein: the positioning piece is a positioning body formed by irregular cross-sectional shapes.
4. The method of manufacturing a personalized orthodontic appliance of claim 1, wherein: the openings of the grooves of all the bracket bodies face the tongue side.
5. The method of manufacturing a personalized orthodontic appliance of claim 1, wherein: an inward contraction bend is arranged on the arch wire between the canine teeth and the premolar teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313112.4A CN112472331A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of personalized lingual orthodontic appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313112.4A CN112472331A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of personalized lingual orthodontic appliance |
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| CN112472331A true CN112472331A (en) | 2021-03-12 |
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| CN202011313112.4A Pending CN112472331A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of personalized lingual orthodontic appliance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226709A (en) * | 2020-09-27 | 2021-01-15 | 苏州瑞迈德医疗科技有限公司 | Preparation method of lingual orthodontic device for tooth correction |
| CN116473697A (en) * | 2023-04-26 | 2023-07-25 | 南京医科大学附属口腔医院 | Lingual fixing retainer |
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| CN206342555U (en) * | 2016-08-22 | 2017-07-21 | 有研医疗器械（北京）有限公司 | A kind of passive type locking bracket and bracket system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112226709A (en) * | 2020-09-27 | 2021-01-15 | 苏州瑞迈德医疗科技有限公司 | Preparation method of lingual orthodontic device for tooth correction |
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| CN116473697B (en) * | 2023-04-26 | 2023-11-03 | 南京医科大学附属口腔医院 | Lingual fixing retainer |
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