WO2022268124A1

WO2022268124A1 - Dental orthodontic appliance, pressure attachment design method, and forming method and system

Info

Publication number: WO2022268124A1
Application number: PCT/CN2022/100467
Authority: WO
Inventors: 张利恒; 周可拓; 侯俊祥; 李俊生; 郑轶刊; 许贤博
Original assignee: 无锡时代天使医疗器械科技有限公司
Priority date: 2021-06-24
Filing date: 2022-06-22
Publication date: 2022-12-29

Abstract

A dental orthodontic appliance, a pressure attachment design method, and a forming method and system. The dental orthodontic appliance (700a) comprises a depressed ridge (701a) connected to an appliance body (702a); the depressed ridge (701a) comprises a first protrusion (7011a) protruding towards a cavity (S); and the first protrusion (7011a) is provided corresponding to an incisal end of a tooth (T) to be corrected. In another embodiment, a dental orthodontic appliance (700b) comprises a torsion ridge (701b) connected to an appliance body (702b); the torsion ridge (701b) protrudes towards a cavity (S); the torsion ridge (701b) is provided corresponding to a tongue surface (M2) and/or a lip surface (M1) of a tooth (T) to be corrected; moreover, the torsion ridge (701b) is located at one side of a tooth body length axis (Z); the extension direction of the torsion ridge (701b) is a direction from the incisal end of the tooth (T) to be corrected towards to a gum end; and the tooth (T) to be corrected is an incisor or a canine.

Description

Dental orthodontic appliance and pressure attachment design method, molding method and system

This application requires that the application date is June 24, 2021, the application number is 202110705615.4, the application name is "pressure attachment design method, appliance forming method, system and storage medium", the application date is June 24, 2021, and the application The number is 202121421899.6, the application name is "Dental Orthodontic Appliance with Torsion Ridge", the application date is June 24, 2021, the application number is 202121418031.0, and the application name is "Dental Orthodontic Appliance with Depressed Ridge" The priority of the Chinese patent application of , the entire content of which is incorporated in this application by reference.

technical field

The present application relates to the technical field of orthodontics, in particular to a design method, molding method and system for a dental orthodontic appliance and a pressure accessory.

Background technique

During orthodontic treatment, for some special cases, it may be necessary to set some pressure accessories to cooperate with the appliance, so that the appliance can apply a predetermined force and/or moment to the dentition according to the design.

In some practical application scenarios, such as when the front teeth are aligned, if the remaining small torsion is not in place or the torsional moment needs to be further increased, the torsional moment can be effectively controlled by adding a pressure accessory to the dental orthodontic appliance or, for patients with overdeveloped anterior teeth or anterior alveolar, it is necessary to use orthodontic appliances to depress the anterior teeth for treatment. The teeth are prone to elongation, requiring the anterior teeth to be depressed during adduction.

Current pressure attachments are poorly corrected.

Contents of the invention

The purpose of the present application is to provide a design method, molding method and system for a dental orthodontic appliance and a pressure accessory.

To achieve one of the above objects, an embodiment of the present application provides a dental orthodontic appliance with a depressed ridge, including an appliance body forming a cavity for accommodating teeth, and a depressed ridge integrally connected to the appliance body, The depressing ridge includes a first protrusion protruding toward the cavity, and the first protrusion is arranged corresponding to the incisal end of the tooth to be corrected.

As a further improvement of an embodiment of the present application, the tooth to be treated is at least one of incisors, canines, and premolars.

As a further improvement of an embodiment of the present application, the first protrusion covers the incisal end of the tooth to be corrected along a first direction, and the first direction is a direction from the labial surface to the lingual surface.

As a further improvement of an embodiment of the present application, the depressing ridge further includes a second protrusion, and the second protrusion is provided corresponding to the lingual or labial surface of the tooth to be corrected.

As a further improvement of an embodiment of the present application, the first protrusion and the second protrusion are hollow structures recessed toward the cavity.

As a further improvement of an embodiment of the present application, the first protrusion is formed by splicing a plurality of protrusions distributed at intervals, and/or the second protrusion is formed by splicing a plurality of protrusions distributed at intervals.

As a further improvement of an embodiment of the present application, the force application direction of the first protrusion is perpendicular to the incisal end of the tooth to be treated, and the force application direction of the second protrusion is perpendicular to the lingual or labial surface of the tooth to be treated.

As a further improvement of an embodiment of the present application, the second protrusion is located between the incisal end of the tooth to be corrected and the lingual fossa.

As a further improvement of an embodiment of the present application, the second protrusion is disposed adjacent to the first protrusion, and there is a gap between the second protrusion and the first protrusion.

As a further improvement of an embodiment of the present application, the first protrusion and the second protrusion are connected to each other.

As a further improvement of an embodiment of the present application, the longitudinal section of the depressing ridge along the second direction is L-shaped, the second direction is the direction from the incisal end of the tooth to be corrected toward the gingival end, and the longitudinal section passes through the The first protrusion and the second protrusion.

As a further improvement of an embodiment of the present application, the depressing ridge is configured such that when the second protrusion is expanded to be flush with the first protrusion, the outer contour of the depressing ridge is elongated and square , circle, ellipse, obtuse angle, crescent, wavy, or broken line.

As a further improvement of an embodiment of the present application, the maximum depth of the depression ridge is in the range of 0.05mm-0.5mm.

As a further improvement of an embodiment of the present application, the area of the opening where the depressing ridge connects to the appliance body is in the range of 0.5 mm ² -18 mm ² .

As a further improvement of an embodiment of the present application, the opening area where the depressing ridge connects to the appliance body is equal to the contact area between the depressing ridge and the tooth to be corrected.

As a further improvement of an embodiment of the present application, when the depressing ridge is located on the side of the long axis of the tooth close to the mesial plane, the range of the first minimum distance between the depressing ridge and the mesial plane is 0.5mm- 3mm. When the depressing ridge is located on the side of the long axis of the tooth close to the distal surface, the second minimum distance between the depressing ridge and the distal surface is in the range of 0.5mm-3mm.

As a further improvement of an embodiment of the present application, the range of the first minimum distance is 1mm-2mm, and the range of the second minimum distance is 1mm-2mm.

As a further improvement of an embodiment of the present application, the third minimum distance between the bottom edge of the second protrusion near the gingival end and the gingival end is in a range of 0.5mm-3mm.

As a further improvement of an embodiment of the present application, the range of the third minimum distance is 1mm-2mm.

As a further improvement of an embodiment of the present application, corresponding to a tooth to be corrected, the dental orthodontic appliance has a plurality of depression ridges distributed at intervals.

As a further improvement of an embodiment of the present application, the orthodontic appliance has two depressing ridges, and the two depressing ridges are respectively located on both sides of the long axis of the same tooth to be treated.

As a further improvement of an embodiment of the present application, the dental orthodontic appliance has a plurality of depressed ridges corresponding to a plurality of teeth to be treated.

To achieve one of the above objects, an embodiment of the present application provides a dental orthodontic appliance with a twisted ridge, including an appliance body forming a cavity for accommodating teeth, and a twisted ridge integrally connected to the appliance body, The twisted ridge protrudes toward the cavity, the twisted ridge is set corresponding to the lingual and/or labial surface of the tooth to be corrected, and the twisted ridge is located on one side of the long axis of the tooth body, and the extension of the twisted ridge The direction is the direction in which the incisal end of the tooth to be treated faces the gingival end, and the tooth to be treated is an incisor or a canine.

As a further improvement of an embodiment of the present application, the torsion ridge is a hollow structure concave toward the cavity.

As a further improvement of an embodiment of the present application, the torsion ridge is a continuous structure.

As a further improvement of an embodiment of the present application, the torsion ridge is formed by splicing a plurality of protrusions distributed at intervals.

As a further improvement of an embodiment of the present application, the outer contour of the torsion ridge is one of a strip shape, a square shape, a circle shape, an ellipse shape, an obtuse angle shape, a crescent shape, a wave shape, and a zigzag shape.

As a further improvement of an embodiment of the present application, the maximum depth of the torsion ridge is in the range of 0.1mm-1mm.

As a further improvement of an embodiment of the present application, the area of the opening where the torsion ridge connects to the appliance body ranges from 0.25mm ² to 36mm ² .

As a further improvement of an embodiment of the present application, the area of the opening is in the range of 1 mm ² -12 mm ² .

As a further improvement of an embodiment of the present application, the area of the opening where the twisted ridge connects to the appliance body is equal to the contact area between the twisted ridge and the tooth to be corrected.

As a further improvement of an embodiment of the present application, the tooth to be corrected has a first maximum width in the direction from the mesial plane to the distal plane, and a first perpendicular distance between the center of the twisted ridge and the long axis of the tooth body The distance is not less than 1/10 of the first maximum width.

As a further improvement of an embodiment of the present application, the second vertical distance between the center of the torsional ridge and the mesial or distal surface close to the torsional ridge is not less than 1/10 of the first maximum width.

As a further improvement of an embodiment of the present application, neither the first vertical distance nor the second vertical distance is less than 1/5 of the first maximum width.

As a further improvement of an embodiment of the present application, the tooth to be corrected has a first maximum height in the direction from the incisal end to the gingival end, and the height of the twisted ridge in the direction from the incisal end to the gingival end is not greater than the first maximum height. 80%.

As a further improvement of an embodiment of the present application, the height is not greater than 60% of the first maximum height.

As a further improvement of an embodiment of the present application, the height is not less than 10% of the first maximum height.

As a further improvement of an embodiment of the present application, the force application direction of the torsion ridge is perpendicular to the lingual and/or labial surfaces of the teeth to be corrected.

As a further improvement of an embodiment of the present application, corresponding to a tooth to be corrected, the dental orthodontic appliance has a plurality of twisted ridges distributed at intervals.

As a further improvement of an embodiment of the present application, multiple twisted ridges are located on the lingual surface of the same tooth to be treated, or multiple twisted ridges are located on the labial surface of the same tooth to be treated.

As a further improvement of an embodiment of the present application, the multiple twisted ridges are respectively located on the lingual and labial surfaces of the same tooth to be corrected, and the multiple twisted ridges are staggered from each other.

As a further improvement of an embodiment of the present application, the dental orthodontic appliance has a plurality of twisted ridges corresponding to a plurality of teeth to be treated.

In order to achieve one of the above objectives, an embodiment of the present application provides a method for designing a pressure accessory, including steps:

Obtain the initial digital dental model;

Obtain a target digital appliance model including pressure attachments;

wearing the target digital appliance model on the initial digital jaw model, and the pressure attachment exerts force on the teeth to be corrected;

Calculating at least one of the resultant moment, the depression force, and the deformation of the target digital appliance model on the teeth to be corrected;

Judging whether the pressure accessory is qualified according to the calculation result.

As a further improvement of an embodiment of the present application, the step "obtaining a target digital appliance model including pressure accessories" specifically includes:

Designing the amount of movement on the initial digital dental model to form an intermediate digital dental model;

Adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model;

A target digital appliance model including a pressure accessory is generated according to the target digital dental model, and the pressure accessory matches the reference pressure accessory.

As a further improvement of an embodiment of the present application, the step of "designing the amount of movement on the initial digital dental model to form an intermediate digital dental model" specifically includes:

A depressive force is designed on the initial digital dental model to form an intermediate digital dental model.

As a further improvement of an embodiment of the present application, the step of "generating a target digital appliance model including pressure accessories according to the target digital dental model" specifically includes:

A target digital appliance model is generated according to the target digital dental model, and the target digital appliance model includes an integrated negative pressure attachment and a shell-shaped appliance model.

As a further improvement of an embodiment of the present application, the step "adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model" specifically includes:

A reference pressure attachment is added to the lingual prominence region of the teeth to be corrected in the intermediate digital dental model to form a target digital dental model.

As a further improvement of an embodiment of the present application, the step "calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge the pressure attachment according to the calculation result Eligibility" specifically includes:

Calculating the lip-to-lip moment of the teeth to be corrected;

Judging the magnitude of the combined lip torque and the preset lip torque, if it is greater, it is judged that the pressure accessory is unqualified; if it is not greater, it is judged that the pressure accessory is qualified.

Calculating the labial engagement moment of the teeth to be corrected and the deformation of the target digital appliance model;

Judging the size of the lip joint moment and the preset lip joint torque and the deformation amount and the preset deformation amount, if at least one of them is greater than, it is judged that the pressure accessory is unqualified; if neither is greater than , it is judged that the pressure accessory is qualified.

A reference pressure attachment is added to the incisal end of the tooth to be treated in the intermediate digital dental model to form a target digital dental model.

Generating an intermediate digital appliance model matching the intermediate digital dental model;

wearing the intermediate digital appliance model on the initial digital jaw model, and calculating the initial depression force obtained by the teeth to be corrected;

calculating the current depression force obtained by the teeth to be treated when the target digital appliance model is worn on the initial digital jaw model;

calculating a first difference between the current depression force and the initial depression force;

Judging the size of the first difference and the preset difference, if greater, then judging that the pressure accessory is qualified; if not greater, then judging that the pressure accessory is unqualified.

A target digital jaw model is formed by adding a reference pressure attachment to the incisal end and lingual side of the teeth to be treated in the intermediate digital jaw model.

wearing the intermediate digital appliance model on the initial digital jaw model, and calculating the initial depression force and initial lingual joint moment of the teeth to be treated;

Calculating the current depressive force and current lingual combined torque obtained by the teeth to be treated when the target digital appliance model is worn on the initial digital jaw model;

calculating a first difference between the current depressing force and the initial depressing force, and calculating a second difference between the initial lingual resultant moment and the current lingual resultant moment, and calculating the first difference and a ratio of said second difference;

Judging the size of the ratio and the preset ratio, if it is greater, it is judged that the pressure accessory is qualified; if it is not greater, it is judged that the pressure accessory is unqualified.

Add a reference pressure attachment to the labial and/or lingual area of the teeth to be corrected in the intermediate digital jaw model to form a target digital jaw model, the reference pressure attachment is located on one side of the long axis of the tooth, and the The reference pressure attachment extends from the incisal end toward the gingival end.

Calculating the resultant torsion moment of the teeth to be corrected;

Judging the magnitude of the torsion resultant torque and the preset torsion resultant moment, if it is larger, it is judged that the pressure accessory is qualified; if it is not greater, it is judged that the pressure accessory is unqualified.

As a further improvement of an embodiment of the present application, the step of "calculating at least one of the resultant moment, depression force, and deformation of the target digital appliance model" on the tooth to be corrected specifically includes:

When the interaction between the target digital appliance model and the initial digital dental model reaches a balance, calculate the resultant moment, depression force, and deformation of the target digital appliance model on the teeth to be treated at least one of them.

As a further improvement of an embodiment of the present application, the design method further includes the steps of:

When it is judged that the pressure accessory is unqualified, adjusting the design value of the pressure accessory to replace the pressure accessory on the target digital appliance model;

Continue to judge whether the pressure accessories are qualified.

As a further improvement of an embodiment of the present application, the step "adjusting the design value of the pressure accessory" specifically includes:

Adjust the size and setting position of the pressure accessory.

As a further improvement of an embodiment of the present application, the step "continue to judge whether the pressure accessory is qualified" specifically includes:

If it is judged that the pressure accessory is unqualified and the design value of the pressure accessory reaches the limit value, the limit value is used as the final design value of the pressure accessory.

As a further improvement of an embodiment of the present application, the step "obtaining the initial digital dental model" specifically includes:

An initial digital jaw model is obtained, and the initial digital jaw model includes a digital grid model of multiple teeth with roots, a digital grid model of periodontal ligament, and a digital grid model of alveolar bone.

As a further improvement of an embodiment of the present application, the step of "calculating at least one of the resultant moment, the depression force, and the deformation of the target digital appliance model" on the tooth to be corrected specifically includes:

At least one of the resultant moment, the depression force, and the deformation amount of the target digital appliance model subjected to the teeth to be corrected is calculated by using a finite element analysis method.

To achieve one of the above objects, an embodiment of the present application provides a pressure accessory design system, the design system includes a memory and a processor, the memory stores a computer program that can run on the processor, the When the processor executes the computer program, the steps in the above-mentioned pressure accessory design method are realized.

To achieve one of the above objects, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned pressure accessory design method are realized. .

In order to achieve one of the above objects, an embodiment of the present application provides a method for forming a dental orthodontic appliance, including steps:

Obtain the initial digital dental model;

Wearing the intermediate digital appliance model on the initial digital jaw model, the intermediate digital appliance applies force to the teeth to be corrected;

Calculating the resultant moment or depression force on the teeth to be corrected;

judging whether the resultant torque or the depression force is within a preset range;

If so, forming a dental orthodontic appliance according to the intermediate digital jaw model;

If not, add a reference pressure accessory to the intermediate digital dental model to form a target digital appliance model including a pressure accessory, and judge whether the pressure accessory is qualified according to the design method of the pressure accessory as described above, and when When it is judged that the pressure accessory is qualified, a dental orthodontic appliance is formed according to the intermediate digital jaw model added with the reference pressure accessory.

To achieve one of the above objects, an embodiment of the present application provides a molding system for dental orthodontic appliances, the molding system includes a memory and a processor, and the memory stores a computer program that can run on the processor When the processor executes the computer program, the steps in the above-mentioned method for forming an orthodontic appliance are realized.

In order to achieve one of the above objects, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned method for forming a dental orthodontic appliance is realized. in the steps.

Compared with the prior art, the beneficial effect of one embodiment of the present application is that the first protrusions in one embodiment of the present application are arranged corresponding to the incisal end of the tooth to be corrected, and the first protrusions concentrate on the incisal end to generate a depressing force parallel to the depressing direction , can assist the depressing operation of the dental orthodontic appliance, and the depressing force generated by the first protrusion can be precisely controlled to avoid force in other directions, thereby improving the depressing effect of the first protrusion; The ridges can concentrate on the teeth to be treated to generate torsional force. The torsional force acts on the teeth to be treated to rotate around the long axis of the tooth, thereby controlling the rotation of the teeth to be treated to the desired position. Minor torsion; one embodiment of the present application can guide and optimize the design of the pressure attachment through computer simulation, which can effectively control the force exerted by the final orthodontic appliance on the actual teeth to be corrected.

Description of drawings

1 is a perspective view of a dental orthodontic appliance with a pressure ridge according to the first embodiment of the present application;

Fig. 2 is a simplified diagram of a dental orthodontic appliance with pressure ridges worn on teeth according to the first embodiment of the present application;

Figure 3 is an enlarged view of the pressure ridge region in Figure 2;

Fig. 4 is a mechanical analysis diagram of a dental orthodontic appliance without a pressure ridge in the first embodiment of the present application worn on a tooth to be treated;

Fig. 5 is a mechanical analysis diagram of a dental orthodontic appliance with a pressure ridge worn on a tooth to be treated according to the first embodiment of the present application;

Figure 6 is another enlarged view of the pressure ridge region in Figure 2;

Fig. 7 is a schematic diagram of a dental orthodontic appliance with pressure ridges of other specific examples;

Fig. 8 is a schematic diagram of the simulation calculation results of the resultant moment expression of the dental orthodontic appliance without pressure ridges and the dental orthodontic appliance with pressure ridges corresponding to different labial inclination angles of the teeth to be corrected according to the first embodiment of the present application;

Fig. 9 is a schematic diagram of pressure ridges at different positions according to the first embodiment of the present application;

Fig. 10 is a schematic diagram of the resultant moment of the pressure ridge in different installation positions according to the first embodiment of the present application;

11a to 11d are schematic diagrams of different patterns formed by surrounding the outer contour of the connecting end according to the first embodiment of the present application;

Fig. 12 is a schematic diagram of the relationship between the depth of the pressure ridge and the generated moment in the first embodiment of the present application;

Fig. 13 is a perspective view of a dental orthodontic appliance with a depressed ridge according to the second embodiment of the present application, the depressed ridge only includes the first protrusion;

Fig. 14 is a simplified diagram of a dental orthodontic appliance with a depressed ridge worn on a tooth according to the second embodiment of the present application, and the depressed ridge only includes the first protrusion;

Fig. 15 is a simplified diagram of a dental orthodontic appliance corresponding to a tooth to be corrected according to the second embodiment of the present application, and the depressed ridge only includes the first protrusion;

Fig. 16 is a perspective view of a dental orthodontic appliance with a depressing ridge according to the second embodiment of the present application, the depressing ridge includes a first protrusion and a second protrusion;

Fig. 17 is a simplified diagram of a dental orthodontic appliance with a depressed ridge worn on a tooth according to the second embodiment of the present application. The depressed ridge includes a first protrusion and a second protrusion;

Fig. 18 is a simplified diagram of a dental orthodontic appliance corresponding to a tooth to be corrected according to the second embodiment of the present application, the depressing ridge includes a first protrusion and a second protrusion;

Fig. 19 is a schematic diagram of a depressing ridge with first and second protrusions distributed at intervals according to the second embodiment of the present application;

Fig. 20 is a schematic diagram of the setting position of the depression ridge according to the second embodiment of the present application;

Fig. 21 is a schematic diagram of a dental orthodontic appliance comprising three depressed ridges according to the second embodiment of the present application;

Fig. 22 is a perspective view of a dental orthodontic appliance with a twisted ridge according to the third embodiment of the present application;

Fig. 23 is a simplified diagram of a dental orthodontic appliance with twisted ridges worn on teeth according to the third embodiment of the present application;

Fig. 24 is a simplified diagram of a dental orthodontic appliance corresponding to a tooth to be treated according to the third embodiment of the present application;

Fig. 25 is a schematic diagram of multiple twisted ridges located on the labial surface of the same tooth to be treated according to the third embodiment of the present application;

Fig. 26 is a schematic diagram of multiple torsion ridges located on the lingual surface of the same tooth to be treated according to the third embodiment of the present application;

Fig. 27 is a schematic diagram of multiple torsion ridges respectively located on the labial and lingual surfaces of the same tooth to be treated according to the third embodiment of the present application;

Fig. 28 is a schematic flowchart of a design method of a pressure accessory according to an embodiment of the present application;

Fig. 29 is a schematic diagram of an initial digital dental model according to an embodiment of the present application;

Fig. 30 is a schematic diagram of an intermediate digital dental model according to an embodiment of the present application;

Fig. 31 is a schematic diagram of a target digital dental model according to an embodiment of the present application;

Fig. 32 is a schematic diagram of a target digital appliance model according to an embodiment of the present application;

Fig. 33 is a schematic diagram of wearing the target digital appliance model on the initial digital jaw model according to an embodiment of the present application;

Fig. 34 is a simplified diagram of the target digital appliance model worn on the initial digital jaw model according to an embodiment of the present application;

Fig. 35 is a schematic flowchart of a design method of a pressure accessory in a specific example of the present application;

Fig. 36 is a schematic flowchart of a design method of a pressure accessory in another specific example of the present application;

Fig. 37 is a schematic diagram of the target digital jaw model when the pressure accessory of the present application corresponds to the depressive ridge that only includes the first protrusion;

Fig. 38 is a schematic diagram of the target digital appliance model when the pressure accessory of the present application corresponds to the depressing ridge that only includes the first protrusion;

Fig. 39 is a schematic diagram of the target digital jaw model when the pressure accessory of the present application corresponds to the depressing ridge including the first protrusion and the second protrusion;

Fig. 40 is a schematic diagram of the target digital appliance model when the pressure accessory of the present application corresponds to the depressing ridge including the first protrusion and the second protrusion;

Fig. 41 is a schematic diagram of the target digital dental model when the pressure accessory of the present application corresponds to the torsion ridge;

Fig. 42 is a schematic diagram of the target digital appliance model when the pressure accessory of the present application corresponds to the torsion crest;

Fig. 43 is a schematic block diagram of a processor of a design system according to an embodiment of the present application;

Fig. 44 is a schematic flowchart of a forming method of a dental orthodontic appliance according to an embodiment of the present application;

Fig. 45 is a schematic diagram of an intermediate digital appliance model according to an embodiment of the present application;

Fig. 46 is a schematic block diagram of a processor of a molding system according to an embodiment of the present application.

detailed description

The application will be described in detail below in conjunction with specific implementations shown in the accompanying drawings. However, these implementations do not limit the present application, and any structural, method, or functional changes made by those skilled in the art based on these implementations are included in the protection scope of the present application.

1 to 3, it is a dental orthodontic appliance 700 with a pressure ridge 701 according to the first embodiment of the present application.

The orthodontic appliance 700 includes an appliance body 702 forming a cavity S for accommodating teeth, and a pressure ridge 701 integrally connected to the appliance body 702 .

The pressure ridge 701 includes a connection end 703 connected to the appliance body 702, an action end 704 located in the cavity S away from the appliance body 702, and an inner wall 705 connecting the connection end 703 and the action end 704. The action end 704 is in the shape of a point or a straight line shape, and the action end 704 is set corresponding to the lingual protuberance D of the tooth T to be corrected.

In this embodiment, it is assumed that the teeth T to be treated are incisors or canines as an example.

Here, when the orthodontic appliance 700 is used to depress the teeth T to be corrected, the appliance body 702 has a depressing force, and the acting end 704 is set corresponding to the lingual prominence D of the tooth T to be corrected, and the active end 704 is set against the lingual prominence D. Generating force to reduce the lip-to-lip moment of the tooth T to be corrected can prevent the tooth T to be corrected from falling to the labial surface during the depression process.

Specifically, in combination with FIG. 4 and FIG. 5 , FIG. 4 is a mechanical analysis diagram of a dental orthodontic appliance 800 without a pressure ridge worn on a tooth T to be corrected, and FIG. 5 is a dental orthodontic appliance with a pressure ridge 701 The mechanical analysis diagram of the 700 worn on the tooth T to be corrected is illustrated by taking the dental

orthodontic appliance

700 and 800 worn on the tooth T to be treated with a lip inclination angle of 45° as an example.

Referring to Fig. 4, when the orthodontic appliance 800 does not have a pressure ridge, the two sides of the top of the tooth T to be corrected are affected by the first force F1' and the second force F2'. At this time, according to the mechanical analysis, it can be known that , the resultant moment M' received by the tooth to be corrected is the labial resultant moment, and the resultant moment M' will cause the labial inclination of the tooth to be treated T.

Referring to Fig. 5, when the orthodontic appliance 700 has a pressure ridge 701, the pressure ridge 701 abuts against the lingual prominence D area of the tooth T to be corrected, and the two sides of the top of the tooth T to be corrected are subjected to the first force F1 and The action of the second force F2, and the position of the lingual prominence D of the tooth T to be corrected is affected by the third force F3, and the third force F3 is closer to the impedance center of the tooth T to be corrected. At this time, according to the mechanical analysis It can be seen that the resultant moment M of the tooth to be corrected is still the labial resultant moment, but the resultant moment M is significantly smaller than the resultant moment M', that is, the labial resultant moment is significantly reduced by increasing the pressure ridge 701, thereby reducing the risk of lip inclination .

It can be understood that, in actual operation, through reasonable selection of the design value of the pressure ridge 701 , the lip joint moment can also be directly eliminated, and the incisors can be completely prevented from falling to the labial surface during the depression process.

When the orthodontic appliance 700 is used to retract the incisors, the active end 704 is set corresponding to the labial surface of the incisors. The active end 704 is preferably located near the edge of the appliance body 702, and the active end 704 exerts force on the incisors. However, the lip-to-lip torque of the incisors T is increased to reduce the risk of torque loss when the incisors are retracted.

In addition, "the acting end 704 is point-shaped or linear" means that the end of the acting end 704 away from the connecting end 703 is point-shaped or linear, so that when the dental orthodontic appliance 700 is worn on the teeth, the active end 704 There is point contact or line contact with the incisors, and the contact area between the acting end 704 and the incisors is relatively small. When the incisors act on the pressure ridge 701, the pressure ridge 701 itself will deform first. When the pressure ridge 701 itself When the amount of deformation is large, the appliance body 702 around the pressure ridge 701 will be deformed and the gap between it and the incisors will become larger. That is to say, the pressure ridge 701 in this embodiment can play a buffering role. The setting of the pressure ridge 701 has little effect on the fitting degree between the appliance body 702 and the incisors, and can improve the stability of the whole orthodontic appliance 700 on the incisors.

In this embodiment, the pressure ridge 701 is a hollow structure concave toward the cavity.

That is to say, the pressure ridge 701 can be integrally formed with the appliance body 702, and the pressure ridge 701 is a female pressure ridge. At this time, the connection end 703 of the pressure ridge 701 is substantially hollow.

In this embodiment, the pressure ridge 701 is used to depress the tooth T to be corrected as an example. The pressure ridge 701 is arranged perpendicular to the lingual prominence D. In this way, the stability of the cooperation between the pressure ridge 701 and the tooth T to be corrected can be improved. And it is conducive to the transmission of force.

Specifically, referring to FIG. 6 , the direction from the connection end 703 toward the action end 704 is defined as the first direction X. When the orthodontic appliance 700 is worn on the teeth, the action end 704 abuts against the contact portion D1 of the lingual prominence D, The first direction X is perpendicular to the tangent plane S1 passing through the contact portion D1.

That is to say, the pressure ridge 701 extends toward the first direction X, and the lingual eminence D is an irregular area. When the contact portion D1 is located on a plane, the tangent plane S1 is the plane, and the first direction X is perpendicular to the plane. When the contact portion D1 is located on an irregular curved surface, the tangent plane S1 is a tangent plane that passes through the curved surface including the contact portion D1, so that the pressure ridge 701 can act perpendicularly on the lingual protuberance D, and cooperate with the contact between the active end 704 and the lingual protuberance D. The point contact or line contact between them can greatly improve the efficiency and stability of the action.

Of course, the pressure ridge 701 can also be other structures. Referring to FIG. 7 , in a specific example, the inner wall 705 ′ of the pressure ridge 701 ′ has several protrusions 706 ′ that are recessed toward the cavity S, so that the entire pressure ridge 701 'is roughly spring-shaped, which can ensure the stable contact between the pressure ridge 701' and the lingual protuberance D, making the force control more precise. 706' can also continue to abut against the lingual eminence D.

At the same time, the spring-type pressure ridge 701' can play a buffering role, reducing the influence of the pressure ridge 701' on the fitting degree of the appliance body 702' and reducing the risk of shedding.

In this example, several protruding parts 706' and action ends 704' are distributed at intervals.

Specifically, the protruding part 706' can be an annular structure arranged around the inner wall 705', or a spiral structure, which can improve the cushioning performance of the pressure ridge 701', and several protruding parts 706' can be evenly distributed, or according to a certain force Regularly distributed, but not limited to this.

It can be understood that, for different T-labial inclination angles of the teeth to be corrected, the expression of the moment of the same design pressure ridge is also different.

In combination with FIG. 8 , the simulation calculation results of the resultant moment expressions of the dental orthodontic appliance without pressure ridges and the dental orthodontic appliance with pressure ridges corresponding to different T-labial inclination angles of the teeth to be corrected are shown.

Here, the resultant torque expressions of the teeth to be treated with T lip inclination angles of 15°, 25°, 30°, and 45° are shown respectively. When no pressure ridge is added to the dental orthodontic The tooth T has a lingual joint moment, and the teeth T to be treated with a lip inclination angle of 25°, 30°, and 45° all have a labial joint moment. more likely.

When a pressure ridge is added to the orthodontic appliance, the teeth T to be corrected with lip inclination angles of 15°, 25°, 30°, and 45° all show lingual joint moments, that is, the teeth to be corrected can be solved by adding pressure ridges. T the problem of lip inclination, and because of different lip inclination angles, its own labial closing moment is different (that is, the labial closing moment is different when the dental orthodontic appliance does not add a pressure ridge), it can be used for different lip inclinations Select the pressure ridge with the appropriate design amount for the angle, and the design of the pressure ridge can refer to the design method of the pressure ridge mentioned above.

In this embodiment, the design value of the pressure ridge 701 includes the location and size of the pressure ridge 701 . The selection of the design value of the pressure ridge 701 will be described in detail below.

In this embodiment, the vertical distance from any point on the outer contour of the connecting end 703 of the pressure ridge 701 to the edge of the appliance body 702 is not less than 2 mm.

Here, “the outer contour of the connection end 703 ” refers to the connection area between the pressure ridge 701 and the appliance body 702 .

That is to say, the setting position of the pressure ridge 701 needs to meet the vertical distance from the bottom end of the connecting end 703 to the edge of the appliance body 702 is not less than 2 mm. When the orthodontic appliance 700 is worn on the teeth, the appliance body 702 The edge of is the junction position between the gum and the appliance body 702 .

9 and 10, it illustrates the resultant moments of the pressure ridge 701 and the edge of the appliance body 702 at different distances, and the pressure ridge 701 is set at points A, B, and C respectively.

It can be seen that the closer the pressure ridge 701 is to the edge of the appliance body 702, the greater the lingual torque, that is, the stronger the effect of reducing the lip tilt phenomenon. When the edge of the appliance body 702 is too close, the lingual joint moment will be greatly weakened, because the effect of the pressure ridge 701 on the tooth T to be corrected will be affected when it is close to the edge of the appliance body 702. Therefore, the connection end is limited in this embodiment. The vertical distance from the bottom end of 703 to the edge of the appliance body 702 is not less than 2 mm.

The effective effect of the pressure ridge 701 is also determined by the size of the pressure ridge 701 .

Specifically, the outer contour of the connection end 703 of the pressure ridge 701 is designed to have an area ranging from 4 mm ² to 6 mm ² .

That is to say, the area of the connection area between the pressure ridge 701 and the appliance body 702 ranges from 4 mm ² to 6 mm ² , and in the direction from the connection end 703 to the action end 704, the cross-sectional area of the pressure ridge 701 gradually decreases until the cross-sectional area The active end 704 tends to zero, so as to avoid the difficulty of demoulding during the molding process of the dental orthodontic appliance 700 .

It can be understood that if the area is too small, effective pressure contact cannot be formed between the pressure crest 701 and the lingual prominence D, and if the area is too large, it will affect the stable fit between the appliance body 702 and the teeth, that is, affect the fit. Therefore, in this embodiment, the area range is defined as 4mm ² -6mm ² , which can ensure effective pressure contact and better fit at the same time.

11a to 11d, the pattern formed by the outer contour of the connecting end 703 is illustrated. It can be seen that the outer contour of the connecting end 703 forms a symmetrical pattern, and the symmetrical pattern can be oval, rectangular, crescent, or rhombus. wait.

The length of the line segment of the symmetrical axis of the symmetrical pattern is not less than 2mm, that is, the symmetrical pattern has a line segment as its symmetrical axis, and the length of the line segment is not less than 2mm, for example, the length and width of the rectangular symmetrical pattern are not less than 2mm, and the symmetrical pattern is avoided. The pattern cannot provide effective force for the teeth T to be corrected.

In addition, the vertical distance from the acting end 704 to the connecting end 703 of the pressure ridge 701 is in the range of 1mm-2mm, that is, the depth of the pressure ridge 701 is in the range of 1mm-2mm.

In conjunction with Figure 12, a schematic diagram of the relationship between the depth H of the pressure ridge 701 and the generated moment M is shown. It can be seen that when the depth H is too small, the pressure ridge 701 cannot generate a moment M for the tooth T to be corrected, and then when the depth H increases, the moment M M is proportional to the depth H. When the depth H reaches a certain value, the moment M remains basically unchanged. It can be understood that if the depth H is too large, the fitting degree of the appliance body 702 will be affected. Therefore, in this embodiment, the pressure ridge 701 The depth range is defined as 1mm-2mm, which can effectively generate the moment M, and can ensure the fitting degree of the main body 702 of the appliance.

Referring to Fig. 13 to Fig. 15, it is a dental orthodontic appliance 700a with a depressed ridge 701a according to the second embodiment of the present application.

The orthodontic appliance 700a includes an appliance body 702a forming a cavity S for receiving teeth, and a depression ridge 701a integrally connected to the appliance body 702a.

The depressing ridge 701a includes a first protrusion 7011a protruding toward the cavity S, and the first protrusion 7011a is disposed corresponding to the incisal end T1 of the tooth T to be corrected.

In this embodiment, the teeth T to be treated are at least one of incisors, canines, and premolars. Here, the teeth T to be treated are incisors as an example.

Here, the tooth T to be treated has a labial surface M1 close to the labial side, a lingual surface M2 close to the lingual side, a mesial plane M3 facing the midline of the face, and a distal plane M4 away from the midline of the face, "the incisal end T1 of the tooth T to be treated" Refers to the part of the tooth to be corrected that has the function of cutting and biting, that is, the area surrounded by the end of the labial surface M1, lingual surface M2, mesial surface M3, and distal surface M4 away from the gingival end T2.

When the orthodontic appliance 700a is used to depress the tooth T to be treated, the main body 702a of the appliance has a depressing force, and the first protrusion 7011a is set corresponding to the incisal end T1 of the tooth T to be treated, and the first protrusion 7011a concentrates on the incisal end T1. The depressing force parallel to the depressing direction can assist the depressing operation of the orthodontic appliance 700a, and the depressing force generated by the first protrusion 7011a can be precisely controlled to avoid force in other directions, thereby improving the first protrusion 7011a. Depresses the effect.

In this embodiment, the first protrusion 7011a covers the incisal end T1 of the tooth T to be treated along a first direction, and the first direction is a direction from the labial surface M1 to the lingual surface M2.

That is to say, the first protrusion 7011a covers the incisal end T1 in the thickness direction of the tooth T to be corrected, which can increase the contact area between the first protrusion 7011a and the incisal end T1, thereby increasing the depressing force generated by the first protrusion 7011a uniformity and stability.

In this embodiment, referring to FIG. 16 to FIG. 18 , the depressing ridge 701a further includes a second protrusion 7012a, and the second protrusion 7012a is provided corresponding to the lingual surface M2 or the labial surface M1 of the tooth T to be corrected.

That is to say, the depressing ridge 701a at this time includes the first protrusion 7011a and the second protrusion 7012a at the same time, the first protrusion 7011a and the second protrusion 7012a act on the tooth T to be corrected at the same time, and the second protrusion 7012a can be used for The torque of the tooth T to be corrected is controlled to avoid unfavorable rotation of the tooth T to be corrected during the depression process.

Here, taking the second protrusion 7012a located on the lingual side M2 of the tooth T to be treated as an example, the angle between the first protrusion 7011a and the second protrusion 7012a is approximately a right angle.

Specifically, the second protrusion 7012a is located between the incisal end T1 of the tooth T to be corrected and the lingual fossa, and there is a relatively flat area between the incisal end T1 and the lingual fossa. The matching degree is higher, that is, the contact area between the second protrusion 7012a and the region is larger, which can improve the strength and stability of the force exerted by the second protrusion 7012a.

In the actual depression operation, part of the teeth T to be treated will fall towards the tongue while being depressed, which will cause the phenomenon of tongue tilting of the teeth T to be treated, and then cause the cusps to rise. The second protrusion 7012a in this embodiment Acting on the area between the incisal end T1 and the lingual fossa, according to the principle of mechanics, the force exerted by the second protrusion 7012a at this time can significantly reduce the lingual combined torque on the tooth T to be corrected, thereby reducing the risk of tongue inclination.

It can be seen that the depressing ridge 701a of this embodiment includes both the first protrusion 7011a and the second protrusion 7012a, which can reduce the risk of tongue inclination while assisting in the depression, thereby achieving deep overlying treatment effect.

In this embodiment, the first protrusion 7011a and the second protrusion 7012a are hollow structures that are recessed toward the cavity S, the force application direction of the first protrusion 7011a is perpendicular to the incisal end T1 of the tooth T to be treated, The force application direction of 7012a is perpendicular to the lingual surface M2 or labial surface M1 of the tooth T to be corrected, which can improve the stability of force application.

The first protrusion 7011a and the second protrusion 7012a of the depression ridge 701a can have various shapes.

In a specific example, the first protrusion 7011a and the second protrusion 7012a are connected to each other.

Here, the first protrusion 7011a and the second protrusion 7012a are connected to each other to form an integral structure, which can reduce molding difficulty.

In another specific example, referring to FIG. 19 , the second protrusion 7012a is disposed adjacent to the first protrusion 7011a, and there is a gap between the second protrusion 7012a and the first protrusion 7011a.

Here, the second protrusion 7012a and the first protrusion 7011a are located close to each other but not connected together, there is a boundary line E between the incisal end T1 and the tongue surface M2, and the second protrusion 7012a is set close to the boundary line E, at this time , the first protrusion 7011a and the second protrusion 7012a can be independently designed according to actual needs, with a high degree of freedom.

In addition, the first protrusion 7011a may be an integral structure, or formed by splicing a plurality of protrusions distributed at intervals.

Likewise, the second protrusion 7012a may be integrally formed, or formed by splicing a plurality of protrusions distributed at intervals.

In this embodiment, the longitudinal section F of the depressed ridge 701a along the second direction is L-shaped, the second direction is the direction from the incisal end T1 of the tooth T to be treated towards the gingival end T2, and the longitudinal section F passes through the first protrusion at the same time 7011a and the second protrusion 7012a.

That is to say, the longitudinal section F is a section obtained by cutting the depressing ridge 701a on a plane parallel to the mesial plane M3 or the distal plane M4, that is, the longitudinal section F is the extension of the depressing ridge 701a on the mesial plane M3 or the distal plane M4 Vertical projection on the surface.

It should be noted that, for different shapes of the depressed ridge 701a, the L-shape here can be a continuous L-shape or a discontinuous L-shape.

The depressing ridge 701a is configured such that when the second protrusion 7012a is expanded to be flush with the first protrusion 7011a, the outer contour of the depressing ridge 701a is elongated, square, circular, elliptical, obtuse, crescent, or wavy One of shape and line shape.

It should be noted that "the second protrusion 7012a is expanded to be flush with the first protrusion 7011a" means that the orthodontic appliance 700a is expanded so that the first opening 7013a of the first protrusion 7011a is aligned with the second protrusion 7012a The second opening 7014a is located on the same plane. At this time, the first opening 7013a and the second opening 7014a form an outer contour, which is defined as the outer contour of the depressed ridge 701a.

The first opening 7013a and the second opening 7014a are respectively the openings of the first protrusion 7011a and the second protrusion 7012a located at the appliance body 702a.

In addition, for different shapes of the depressed ridge 701a, the outer contour here can be a continuous outer contour or a discontinuous outer contour.

In this embodiment, taking the elongated outer contour of the depressed ridge 701a as an example, the first protrusion 7011a is a long strip structure extending along the lip surface M1 toward the tongue surface M2, and the second protrusion 7012a is a long strip structure extending along the The incisal end T1 is a strip-shaped structure extending toward the gingival end T2, the first protrusion 7011a and the second protrusion 7012a are connected to each other and are perpendicular to each other, and the depression ridge 701a is an L-shaped concave structure protruding toward the cavity S.

In this embodiment, the depth of the first protrusion 7011a and the depth of the second protrusion 7012a may be equal or not, which may be determined according to actual conditions.

Here, "depth" defines the degree of depression of the first protrusion 7011a and the second protrusion 7012a. When the first protrusion 7011a is a depression with inconsistent depth, "the depth of the first protrusion 7011a" refers to the depth of the first protrusion 7011a. Similarly, when the second protrusion 7012a is a depression with inconsistent depth, "the depth of the second protrusion 7012a" refers to the maximum depth of the second protrusion 7012a.

In this embodiment, the maximum depth of the depressed ridge 701a ranges from 0.05 mm to 0.5 mm.

Here, a reasonable depth of the depressing ridge 701a is designed. On the one hand, the depth of the depressing ridge 701a is prevented from being too small to produce an effective force on the tooth T to be corrected; 700a fits with the tooth T to be corrected.

In this embodiment, the area of the opening where the depressing ridge 701a is connected to the appliance body 702a is equal to the contact area between the depressing ridge 701a and the tooth T to be corrected, which facilitates the shaping of the depressing ridge 701a and improves the distance between the depressing ridge 701a and the tooth T to be corrected. Contact area.

The opening area here refers to the total area of the openings of the first protrusion 7011a and the second protrusion 7012a.

The area of the opening where the depression ridge 701a connects to the appliance body 702a ranges from 0.5 mm ² to 18 mm ² .

Here, a reasonable opening area of the depressing ridge 701a is designed. On the one hand, the opening area of the depressing ridge 701a is prevented from being too small to produce an effective force on the tooth T to be corrected. On the other hand, the opening area of the depressing ridge 701a is too large to affect the The degree of fit between the orthodontic appliance 700a and the teeth T to be treated.

In this embodiment, referring to FIG. 20, when the depressing ridge 701a is located on the side of the long axis Z of the tooth close to the mesial plane M3, the range of the first minimum distance L1 between the depressing ridge 701a and the mesial plane M3 is 0.5 mm-3mm.

That is to say, when the depressing ridge 701a is closer to the mesial plane M3, the first minimum distance L1 between the side edge of the depressing ridge 701a close to the mesial plane M3 and the mesial plane M3 ranges from 0.5 mm to 3 mm.

When the depressing ridge 701a is located on the side of the long axis Z of the tooth close to the distal surface M4, the second minimum distance L2 between the depressing ridge 701a and the distal surface M4 ranges from 0.5 mm to 3 mm.

That is to say, when the depressing ridge 701a is closer to the distal surface M4, the second minimum distance L2 between the side edge of the depressing ridge 701a near the distal surface M4 and the distal surface M4 ranges from 0.5 mm to 3 mm.

In a specific example, the range of the first minimum distance L1 is 1mm-2mm, and the range of the second minimum distance L2 is 1mm-2mm.

Here, a reasonable distance between the depressing ridge 701a and the mesial surface M3 and the distal surface M4 is designed to prevent the depressing ridge 701a from being too close to the mesial surface M3 or the distal surface M4 to produce an effective force on the orthodontic tooth T. At the same time, It is avoided that the depressed ridges 701a of adjacent teeth T to be corrected are too close to interfere with each other.

In this embodiment, the third minimum distance L3 between the bottom edge 7015a of the second protrusion 7012a close to the gingival end T2 and the gingival end T2 ranges from 0.5 mm to 3 mm.

Here, the gingival end T2 is the bottom edge of the appliance body 702a, that is, the third minimum distance L3 between the bottom edge 7015a of the second protrusion 7012a and the bottom edge of the appliance body 702a ranges from 0.5 mm to 3 mm.

In a specific example, the range of the third minimum distance L3 is 1mm-2mm.

Here, a reasonable distance between the depressing ridge 701a and the gingival end T2 is designed. On the one hand, avoid the depressing ridge 701a being too close to the gingival end T2 to reduce the risk of tongue inclination; on the other hand, avoid depressing the ridge 701a too close The gingival end T2 affects the fit between the orthodontic appliance 700a and the tooth T to be treated.

In other embodiments, corresponding to a tooth T to be treated, the dental orthodontic appliance 700a has a plurality of depressing ridges 701a distributed at intervals.

Here, the orthodontic appliance 700a has two depression ridges 701a as an example, and the two depression ridges 701a are respectively located on both sides of the long axis Z of the same tooth T to be treated, and the effect of double ridges on the tooth T to be treated can be effective Improve the uniformity of force application.

The two depression ridges 701a may be different depression ridges.

Of course, the orthodontic appliance 700a may also include other numbers of depressing ridges 701a. For example, referring to FIG. The location of the crest 701a can be determined according to specific requirements.

The dental orthodontic appliance 700a has a plurality of depression ridges 701a corresponding to multiple teeth T to be treated, that is to say, when there are multiple teeth T to be treated, corresponding to each tooth T to be treated, the dental orthodontic appliance 700a All have depression ridges 701a, and the number, position and shape of the depression ridges 701a corresponding to each tooth T to be treated can be independently designed.

Referring to Fig. 22 to Fig. 24, it is a dental orthodontic appliance 700b with a twisted ridge 701b according to the third embodiment of the present application.

The orthodontic appliance 700b includes an appliance body 702b forming a cavity S for receiving teeth, and a torsion ridge 701b integrally connecting the appliance body 702b.

The twisted ridge 701b protrudes toward the cavity S, the twisted ridge 701b is set corresponding to the lingual surface M2 and/or the labial surface M1 of the tooth T to be corrected, and the twisted ridge 701b is located on one side of the long axis Z of the tooth body, and the extension direction of the twisted ridge 701b is the direction from the incisal end T1 of the tooth to be treated towards the gingival end T2, and the tooth to be treated T is an incisor or a canine.

Here, the tooth T to be treated has a labial surface M1 close to the labial side, a lingual surface M2 close to the lingual side, a mesial surface M3 facing the facial midline, and a distal surface M4 away from the facial midline.

"The twisted ridge 701b is located on one side of the long axis Z of the tooth" means that for one surface (labial surface M1 or lingual surface M2), the twisted ridge 701b is located on one side of the long axis Z of the tooth.

The setting positions of the twisted ridge 701b include: the twisted ridge 701b is located on the lingual surface M2, and the twisted ridge 701b is located on the side of the long axis Z of the tooth close to the mesial plane M3; the twisted ridge 701b is located on the lingual surface M2, and the torsional ridge 701b is located on the tooth The long axis Z is close to the side of the distal surface M4; the twisted ridge 701b is located on the labial surface M1, and the twisted ridge 701b is located on the side of the long axis Z of the tooth close to the mesial surface M3; the twisted ridge 701b is located on the labial surface M1, and the twisted ridge The 701b is located on the side of the long axis Z of the tooth close to the distal surface M4. In actual operation, different torsion ridges 701b can be selected according to the torsion requirements.

The torsion ridge 701b in this embodiment can generate a torsional force on the tooth T to be treated, and the torsion force acts on the tooth T to be treated to rotate around the long axis Z of the tooth body, thereby controlling the tooth T to be treated to rotate to a desired position, for example, in the front teeth ( During the alignment of incisors or canines, etc.), the torsion ridge 701b can realize the remaining slight torsion.

In this embodiment, the torsional ridge 701b is a hollow structure that is sunken toward the cavity S, and the force direction of the torsional ridge 701b is perpendicular to the lingual surface M2 and/or the labial surface M1 of the tooth T to be corrected.

In this embodiment, the torsion ridge 701b can be a continuous structure, which can reduce the difficulty of forming.

Alternatively, the torsion ridge 701b is formed by splicing a plurality of protrusions distributed at intervals, and the plurality of protrusions can be independently designed according to actual needs, with a high degree of freedom.

In this embodiment, the outer contour of the torsion ridge 701b is one of a strip shape, a square shape, a circle shape, an ellipse shape, an obtuse angle shape, a crescent shape, a wave shape, and a zigzag shape.

It should be noted that the outer contour of the torsion ridge 701b refers to the outer contour of the opening of the torsion ridge 701b at the appliance body 702b.

In addition, for different shapes of the torsion ridge 701b, the outer contour here may be a continuous outer contour or a discontinuous outer contour.

In this embodiment, the maximum depth of the torsional ridge 701b ranges from 0.1 mm to 1 mm.

Here, a reasonable depth of the torsional ridge 701b is designed, on the one hand, to prevent the depth of the torsional ridge 701b from being too small to produce an effective force on the treated tooth T, and on the other hand, to avoid the excessive depth of the torsional ridge 701b from affecting the orthodontic appliance 700b fits with the tooth T to be corrected.

In this embodiment, the area of the opening where the twisted ridge 701b is connected to the appliance body is equal to the contact area between the twisted ridge 701b and the tooth T to be corrected, which facilitates the formation of the twisted ridge 701b and improves the contact between the twisted ridge 701b and the tooth T to be treated area.

The opening area of the torsion ridge 701b connected to the appliance body 702b ranges from 0.25mm ² to 36mm ² .

In a specific example, the opening area ranges from 1 mm ² to 12 mm ² .

Here, a reasonable opening area of the torsion ridge 701b is designed. On the one hand, it avoids that the opening area of the torsion ridge 701b is too small to produce an effective force on the tooth T to be corrected; The degree of fit between the orthodontic appliance 700b and the teeth T to be treated.

In this embodiment, the tooth T to be corrected has a first maximum width W1 in the direction from the mesial plane M3 to the distal plane M4, and the first vertical distance L4 between the center of the torsion ridge 701b and the long axis Z of the tooth body is not less than 1/10 of the first maximum width W1.

Meanwhile, the second vertical distance L5 between the center of the twisted crest 701b and the mesial plane M3 or the distal plane M4 close to the twisted crest 701b is not less than 1/10 of the first maximum width W1.

That is to say, when the twisted ridge 701b is located between the long axis Z of the tooth and the mesial plane M3, the distance between the center of the twisted ridge 701b and the mesial plane M3 is the second vertical distance L5; When between the long axis Z of the body and the distal surface M4, the distance between the center of the torsion ridge 701b and the far surface M4 is the second vertical distance L5, that is, the torsion ridge 701b is located between the long axis Z of the tooth body and the mesial surface M3 between, or the torsional ridge 701b is located between the long axis Z of the tooth body and the distal surface M4, and there are gaps between the torsional ridge 701b and the long axis Z of the tooth body, the mesial surface M3, and the distal surface M4.

In a specific example, neither the first vertical distance L4 nor the second vertical distance L5 is less than 1/5 of the first maximum width W1.

Here, a reasonable gap between the torsion ridge 701b and the long axis Z of the tooth body, the mesial surface M3, and the distal surface M4 is designed. On the one hand, it is avoided that the twisting ridge 701b is too close to the mesial plane M3 or the distal plane M4 to affect the fit between the orthodontic appliance 700b and the teeth T to be treated.

In this embodiment, the tooth T to be treated has a first maximum height H1 in the direction from the incisal end T1 to the gingival end T2, and the height H2 of the twisted ridge 701b in the direction from the incisal end T1 to the gingival end T2 is not greater than the first maximum height H1 80% of.

In a specific example, the height H2 is not greater than 60% of the first maximum height H1, and the height H2 is not less than 10% of the first maximum height H1.

Here, a reasonable height of the torsional ridge 701b is designed, on the one hand, to prevent the height of the torsional ridge 701b from being too small to produce an effective force on the tooth T to be corrected; The degree of fit between the appliance 700b and the teeth T to be treated.

In this embodiment, corresponding to a tooth T to be corrected, the dental orthodontic appliance 700b has a plurality of torsion ridges 701b distributed at intervals, and the multiple torsion ridges 701b work together to effectively improve the torsion ability of the tooth T to be treated.

The distribution of the plurality of twist ridges 701b includes:

(1) Referring to Fig. 25, multiple twisted ridges 701b are located on the labial surface M1 of the same tooth T to be treated, and multiple twisted ridges 701b are located on the same side of the long axis Z of the tooth;

(2) Referring to FIG. 26, multiple twisted ridges 701b are located on the lingual surface M2 of the same tooth T to be corrected, and multiple twisted ridges 701b are located on the same side of the long axis Z of the tooth;

(3) Referring to Fig. 27, multiple twisted ridges 701b are respectively located on the lingual surface M2 and labial surface M1 of the same tooth T to be corrected, and the multiple twisted ridges 701b are staggered from each other, for example, when there are two twisted ridges 701b respectively When located on the lingual surface M2 and the labial surface M1, the distance between the twisted ridge 701b located on the lingual surface M2 and the mesial surface M3 and the distance between the twisted ridge 701b located on the labial surface M1 and the mesial surface M3 are different.

The dental orthodontic appliance 700b has multiple torsion ridges 701b corresponding to multiple teeth T to be treated, that is to say, when there are multiple teeth T to be treated, corresponding to each tooth T to be treated, the dental orthodontic appliance 700a All have twisted ridges 701b, and the number, position, and shape of the twisted ridges 701b corresponding to each tooth T to be treated can be independently designed.

One embodiment of the present application also provides a design method of a pressure accessory, the pressure accessory can be the pressure ridge 701 as described in the first embodiment above, the depression ridge 701a as described in the second embodiment above, and the pressure ridge 701a as described in the third embodiment above The torsional crest 701b.

Of course, it can be understood that the pressure attachment can also be in other forms.

Referring to FIG. 28 , it is a design method of a pressure accessory according to an embodiment of the present application. The method includes steps:

S100: Obtain an initial digital dental model;

S102: Obtain a target digital appliance model including pressure accessories;

S104: Wear the target digital appliance model on the initial digital dental model, and apply force to the teeth to be corrected by the pressure attachment;

S106: Calculating at least one of a resultant moment, a depression force, and a deformation amount of a target digital appliance model on the tooth to be corrected;

S108: Judging whether the pressure accessory is qualified according to the calculation result.

Here, for ease of understanding, the application scenarios of the pressure accessories are briefly introduced, but not limited thereto, and the design method of the pressure accessories in this embodiment can also be applied to other scenarios.

In this implementation manner, a deep coverage application scenario is taken as an example for illustration.

Overbite is one of the most common clinical manifestations of malocclusion in orthodontics. There are many reasons for overbite, some are due to overdevelopment of anterior teeth or anterior alveolar, and some are due to underdevelopment of posterior teeth or posterior alveolar.

Among them, for patients with overdeveloped anterior teeth or anterior alveolar, it is necessary to use a dental orthodontic appliance to depress the anterior teeth for treatment. It is easy to elongate, and it is necessary to depress the anterior teeth during the adduction process. Depression of the anterior teeth is a very common orthodontic requirement in clinical orthodontics.

However, the anterior tooth depression method in the current clinical orthodontic treatment often causes the anterior teeth to tilt to the labial or lingual side, which seriously affects the efficiency of orthodontic treatment, and may also cause a large tilt of the patient's teeth, and even cause damage to the patient's periodontium. Doctors have also carried out corresponding research and various attempts, but they are still unable to control the labial or lingual torque during the process of depressing the anterior teeth.

The main problem of the current orthodontic appliance in the process of anterior tooth depression is that the dental orthodontic appliance does exert a depressive force on the teeth, but the depressive force also produces a large labial or lingual moment. The material has insufficient torque control.

It can be seen that the control of labial torque or lingual torque is very important in the process of anterior tooth depression orthodontic treatment. However, in actual operation, doctors determine the tooth arrangement plan based on clinical medical experience, and there is a lack of simulation verification of teeth in real clinical conditions. , it is impossible to evaluate the actual force of the teeth after wearing orthodontic appliances. During the treatment of anterior tooth depression, doctors have made a lot of attempts, which not only invested a lot of energy but also affected the treatment efficiency, and may also introduce additional treatment. risk.

In this embodiment, the labial or lingual moment can be effectively controlled by adding a pressure accessory to the orthodontic appliance. More importantly, this embodiment can simulate the actual stress of the teeth to be corrected by a computer To judge whether the pressure accessories are qualified.

In addition, in some other application scenarios, such as when the front teeth are aligned, if the remaining small torsion is not in place or the torsion torque needs to be further increased, it can be effectively controlled by adding a pressure accessory to the dental orthodontic appliance torque.

Specifically, in this embodiment, the target digital appliance model with pressure accessories is worn on the initial digital dental model, and the actual situation of the teeth to be corrected can be simulated through computer analysis under the action of the target digital appliance model including the pressure accessories. Force situation, so as to judge whether the pressure accessories are qualified.

That is to say, this embodiment can guide and optimize the design of the pressure attachment through computer simulation, and can effectively control the force exerted by the final orthodontic appliance on the actual teeth to be corrected, thereby effectively avoiding excessive lip inclination , Tongue tilt too large and other issues.

It can be understood that the design method of the pressure accessory in this embodiment is not limited to the application scenario of deep overburden, and the design method of the pressure accessory in this embodiment can also be used in other orthodontic application scenarios, such as anterior tooth adduction application scenarios, etc.

In this embodiment, with reference to FIG. 29, step S100 specifically includes:

An initial digital jaw model 100 is obtained, and the initial digital jaw model 100 includes a digital mesh model of multiple teeth with roots, a digital mesh model of periodontal ligament, and a digital mesh model of alveolar bone.

Here, the initial digital jaw model 100 refers to the jaw model of the patient who has not added the design amount currently, and the initial digital jaw model 100 can be obtained by obtaining the geometric model of the teeth, periodontal ligament and alveolar bone of the patient's jaw through CT scanning .

Among them, each tooth is a separate independent individual, and the root of each tooth is covered by the periodontal ligament mesh, and at the same time, the periodontal ligament mesh is covered by the alveolar bone mesh.

In this embodiment, the initial digital jaw model 100 may be a maxillary model or a mandibular model. In addition, the initial digital jaw model 100 may be a complete jaw model or a partial jaw model.

In the case of using orthodontic appliances for orthodontic treatment, it is usually necessary to divide the orthodontic treatment into multiple successive stages (for example, 20-40 successive stages), and each stage corresponds to a dental orthodontic appliance.

However, the jaws of each stage are different, such as the layout of the teeth at each stage is different, and the orientation of the cavity of the alveolar bone containing the tooth root may be different at each stage. In order to test the orthodontic appliance of a certain stage, it is necessary to obtain the The initial geometric model of the jaw, that is, the initial digital jaw model 100 .

In this embodiment, the geometric model of the jaw at the end of a certain stage obtained by analyzing the effect of the dental orthodontic appliance using the finite element method can be used as the geometric model of the jaw at the beginning of the next stage.

At this time, the initial digital jaw model 100 is an initial jaw finite element model 100, and the initial jaw finite element model 100 includes a tooth finite element model, a periodontal ligament finite element model, and an alveolar bone finite element model.

In order to simplify the calculation and more accurately simulate the tooth layout in the oral cavity, the relative degree of freedom of the contact surface between the tooth finite element model and the periodontal ligament model can be constrained, that is, the contact surface between the tooth root and the periodontal ligament is set not to have relative displacement .

Specifically, the contact surfaces of the tooth finite element model and the periodontal ligament finite element model can share nodes, so as to limit the relative degrees of freedom of the two contact surfaces.

Similarly, in order to simplify the calculation and more accurately simulate the tooth layout in the oral cavity, the relative degrees of freedom of the contact surface between the alveolar bone finite element model and the periodontal ligament finite element model can be constrained, that is, the alveolar bone and periodontal ligament There is no relative displacement of the contact surface.

Specifically, the contact surfaces of the finite element model of the alveolar bone and the finite element model of the periodontal ligament can share nodes, so as to limit the relative degrees of freedom of the contact surfaces of the two.

To sum up, based on the tooth finite element model, the periodontal ligament finite element model, the alveolar bone finite element model and the constraints, the initial dental and jaw finite element model 100 can be obtained.

Step S102 specifically includes:

In combination with FIG. 30 , the amount of movement is designed on the initial digital dental model 100 to form an intermediate digital dental model 200 ;

This step is specifically: designing a depressing force on the initial digital dental model 100 to form an intermediate digital dental model 200 .

That is to say, this embodiment takes the depression operation on the front teeth as an example for illustration, and performs finite element calculation on the initial digital jaw model 100 according to the expected depression force to obtain the intermediate digital jaw model 200, and the intermediate digital jaw model 200 It is the digital dental model obtained after the depression operation in an ideal state.

In conjunction with FIG. 31 , a reference pressure attachment 301 is added to the intermediate digital dental model 200 to form a target digital dental model 300 ;

This step is specifically: adding a reference pressure attachment 301 to the lingual prominence region of the tooth to be treated in the intermediate digital dental model 200 to form a target digital dental model 300 .

Referring to FIG. 32 , a target digital appliance model 400 including a pressure accessory 401 is generated according to the target digital dental model 300 , and the pressure accessory 401 matches the reference pressure accessory 301 .

It should be noted that the pressure accessory 401 of this embodiment is described by taking the pressure ridge 701 of the above-mentioned first embodiment as an example, and the specific description of the pressure accessory 401 can refer to the description of the pressure ridge 701 of the above-mentioned first embodiment.

This step specifically includes: generating a target digital appliance model 400 according to the target digital dental model 300 , and the target digital appliance model 400 includes an integrated negative pressure attachment 401 and a shell-shaped appliance model 402 .

In the prior art, the hot-pressed film molding process is a commonly used method for making dental orthodontic appliances. In this type of method, the polymer film is hot-pressed on the dental mold to obtain the corresponding female mold, and then The redundant part of the female mold is cut and removed, and finally a dental orthodontic appliance is obtained.

In this embodiment, the target digital dental model 300 with the reference pressure attachment 301 can be obtained first, and then the hot pressing film molding process is simulated on the target digital dental model 300 by the finite element analysis method to obtain the pressure attachment 401 The target digital appliance model 400 of the target digital appliance model 400, since the simulation is a hot-pressed film forming process, the inner contour of the target digital appliance model 400 matches the outer contour of the target digital dental model 300, and the pressure attachment 401 also matches the reference pressure attachment 301s match each other.

The target digital appliance model 400 of this embodiment corresponds to a shell-shaped dental orthodontic appliance, which includes an integrated negative pressure attachment 401 and a shell-shaped appliance model 402. At this time, the target digital dental model 300 is added The reference pressure attachment 301 is a concave portion, and the pressure attachment 401 is a female pressure attachment 401 that is recessed toward the cavity of the shell-shaped appliance model 402 for accommodating teeth.

Of course, in other embodiments, other forms of orthotics may also be used, or the pressure accessories may be other added forms.

In addition, the above-mentioned intermediate digital dental model 200 , target digital dental model 300 and target digital appliance model 400 are all finite element models.

Referring to FIG. 33 , step S104 is to wear the target digital appliance model 400 on the initial digital jaw model 100 , and the pressure attachment 401 exerts force on the teeth to be corrected.

Here, the finite element model of the target digital appliance model 400 is worn on the finite element model of the initial digital dental model 100, that is, the finite element model of the dental jaw and the finite element model of the dental orthodontic appliance are constrained to be combined to Simulate the actual aligner wearing process.

That is to say, the target digital appliance model 400 added with the pressure attachment 401 is interference-fitted to the initial digital jaw model 100, and the target digital aligner model 400 will make the teeth at the initial digital jaw model 100 move by extrusion , the pressure attachment 401 will apply force to the teeth to be treated, so as to simulate the depressing operation of the target digital appliance model 400 on the initial digital jaw model 100 .

In this embodiment, step S106 specifically includes:

When the interaction between the target digital appliance model 400 and the initial digital jaw model 100 reaches equilibrium, calculate the resultant moment Mx of the tooth to be treated and/or the deformation ΔM of the target digital appliance model 400 .

Here, "the interaction reaches balance" means that when the force fluctuations in the finite element model of the target digital appliance model 400 are less than the preset threshold and remain for a certain period of time, it is considered that the interaction has reached a balance. At this time, the teeth can be The new layout of is the orthodontic effect that the target digital appliance model 400 can achieve, that is, the layout of the teeth after fully wearing the dental orthodontic appliance corresponding to the target digital appliance model 400 .

In other words, the resultant moment Mx of the tooth to be corrected and/or the deformation ΔM of the target digital appliance model 400 simulates the force situation after the dental orthodontic appliance is fully worn, so as to characterize whether the added pressure accessory 401 qualified.

In step S106 , the resultant moment Mx of the teeth to be treated and/or the deformation ΔM of the target digital appliance model 400 are calculated using the finite element analysis method.

Specifically, it is possible to calculate only one of the resultant moment Mx of the teeth to be treated and the deformation ΔM of the target digital appliance model 400, or calculate the resultant moment Mx of the teeth to be treated and the target digital appliance model 400 at the same time. Deformation ΔM.

Here, referring to FIG. 34 , when the target digital appliance model 400 is worn on the initial digital jaw model 100 , the pressure attachment 401 of the target digital appliance model 400 exerts force on the lingual prominence of the teeth to be corrected in the initial digital jaw model 100 area, the force generated by the pressure attachment 401 on the teeth to be corrected can reduce the lip torque Mx received by the teeth to be corrected, so as to effectively control the lip torque and prevent the front teeth from falling to the labial surface during the depression of the front teeth.

In addition, the deformation ΔM of the target digital appliance model 400 refers to the deformation ΔM of the shell-shaped appliance model 402 around the pressure attachment 401. When the pressure attachment 401 acts on the teeth to be adjusted, the teeth to be adjusted will react against the pressure Attachment 401, which in turn leads to an increase in the distance between the shell-shaped appliance model 402 around the pressure attachment 401 and the teeth to be corrected. When the distance is too large, it will affect the entire target digital appliance model 400 and the initial digital dental model 100 Therefore, it is necessary to control the amount of deformation ΔM to avoid the target digital appliance model 400 being too deformed and directly departing from the initial digital jaw model 100 .

In a specific example, when only the resultant moment Mx is calculated, referring to Fig. 35, steps S106 and S108 specifically include:

Calculate the combined lip torque Mx of the teeth to be corrected;

Judging the magnitude of the combined lip torque Mx and the preset lip torque Mx ₀ , if it is larger, then it is judged that the pressure accessory 401 is unqualified; if it is not greater, it is judged that the pressure accessory 401 is qualified.

In another specific example, when calculating the resultant moment Mx and the deformation ΔM at the same time, referring to Fig. 36, steps S106 and S108 specifically include:

Calculate the labial joint moment Mx of the teeth to be corrected and the deformation amount △M of the target digital appliance model;

Judging the magnitude of the lip-toward resultant moment Mx and the preset lip-toward resultant moment Mx ₀ and the magnitude of the deformation △M and the preset deformation △M ₀ , if at least one of them is greater than that, it is judged that the pressure accessory 401 is unqualified; if If they are not greater than, it is judged that the pressure accessory 401 is qualified.

Here, the current pressure accessory 401 is judged to be a qualified pressure accessory 401 only when the combined lip torque Mx and deformation ΔM meet the requirements at the same time.

In this embodiment, in order to reduce the risk of labial inclination, it is necessary to control the combined labial moment Mx of the teeth to be treated to be ≤ 0, that is to say, at this time, the teeth to be treated will not fall toward the labial direction, or The teeth to be corrected are tilted towards the lingual direction, that is, the preset labial resultant moment Mx ₀ is set to zero, but not limited thereto.

In addition, in order to avoid the distance between the shell-shaped appliance model 402 around the pressure attachment 401 and the tooth to be corrected is too large, here the preset deformation amount ΔM ₀ is set to 1.5mm, that is, the shell-shaped appliance model 402 and the tooth to be corrected The limit value of the distance between the teeth is 1.5mm, and when the deformation amount △M≤1.5mm, it is judged that the deformation amount △M meets the requirements, but it is not limited thereto.

Continuing with FIG. 35 and FIG. 36 , when it is judged that the pressure accessory 401 is unqualified, go to step S110 , adjust the design value of the pressure accessory 401 and replace the target digital appliance model 400 with the pressure accessory 401 .

Then continue to judge whether the pressure accessory 401 is qualified.

Specifically, steps S102 to S110 can be repeated at this time, that is, adjust the design value of the reference pressure attachment 301 in the target digital dental model 300 according to the adjusted design value of the pressure attachment 401, and then generate a pressure attachment 401 containing the new design value The target digital appliance model 400 is used to further judge whether the pressure accessory 401 of the new design value is qualified until the pressure accessory 401 is qualified.

In this embodiment, “adjusting the design value of the pressure accessory 401 ” specifically refers to adjusting the size and installation position of the pressure accessory 401 .

The size includes the height, cross-sectional area, etc. of the pressure attachment 401, and the setting position includes the distance between the pressure attachment 401 and the edge of the shell-shaped appliance model 402, etc.

Here, in consideration of the actual molding process and the stability of the actual orthodontic appliance, etc., there are limit values for the size and installation position.

If it is judged that the pressure accessory 401 is unqualified and the design value of the pressure accessory 401 reaches the limit value, then the limit value is used as the final design value of the pressure accessory 401 .

That is to say, if the design value of the pressure accessory 401 has been adjusted to the limit value, but the calculated lip joint moment Mx and deformation ΔM still do not meet the requirements, the limit value is directly used as the final design value of the pressure accessory 401 .

Next, the design method of the pressure accessory when the pressure accessory 401 of this embodiment is the depressing ridge 701a of the above-mentioned second embodiment and the torsion ridge 701b of the above-mentioned third embodiment will be described.

Referring to Fig. 37, when the pressure accessory 401 corresponds to the situation in which the depressive ridge 701a of the above-mentioned second embodiment only includes the first protrusion 7011a, the aforementioned steps "add the reference pressure accessory 301 to the intermediate digitized dental model 200 to form the target digitized Dental model 300" is specifically:

A reference pressure attachment 301a is added to the incisal end of the tooth to be treated in the intermediate digital dental model 300 to form a target digital dental model 300a.

Referring to FIG. 38 , then, a target digital appliance model 400a including a pressure accessory 401a is generated according to the target digital dental model 300a, and the pressure accessory 401a matches the reference pressure accessory 301a.

Step S106 specifically includes:

Generate an intermediate digital appliance model 600 matching the intermediate digital dental model 200;

Put the intermediate digital appliance model 600 on the initial digital jaw model 100, and calculate the initial depression force Y1 obtained by the teeth to be corrected;

Calculating the current depression force Y2 of the teeth to be treated when the target digital appliance model 400a is worn on the initial digital jaw model 100;

Calculate the first difference ΔY between the current depression force Y2 and the initial depression force Y1;

Judging the size of the first difference ΔY and the preset difference, if it is greater, it is judged that the pressure accessory 401a is qualified; if not greater, it is judged that the pressure accessory 401a is unqualified.

Here, whether the pressure accessory 401a is qualified or not is judged by calculating the increment of the depressing force.

For other steps, reference may be made to the foregoing description, which will not be repeated here.

Referring to FIG. 39 , when the pressure accessory 401 corresponds to the case where the depression ridge 701a of the above-mentioned second embodiment includes the first protrusion 7011a and the second protrusion 7012a, the aforementioned step "adding a reference pressure accessory to the intermediate digital dental model 200 301 and form target digitized dental model 300 " be specifically:

A reference pressure attachment 301a' is added to the incisal end and lingual side of the tooth to be treated in the middle digital jaw model 300 to form a target digital jaw model 300a'.

Referring to Fig. 40, then, a target digital appliance model 400a' containing a pressure accessory 401a' is generated according to the target digital dental model 300a', and the pressure accessory 401a' matches the reference pressure accessory 301a'.

Step S106 specifically includes:

Put the intermediate digital appliance model 600 on the initial digital jaw model 100, and calculate the initial depression force Y1' and the initial lingual joint moment Mx ₁ ' of the teeth to be treated;

Calculate the current depression force Y2' and the current lingual resultant moment Mx ₂ ' of the teeth to be treated when the target digital appliance model 400a' is worn on the initial digital jaw model 100;

Calculate the first difference ΔY' between the current depressing force Y2' and the initial depressing force Y1', and calculate the second difference ΔMx' between the initial lingual resultant moment Mx ₁ ' and the current lingual resultant moment Mx ₂ ', and Calculate the ratio of the first difference ΔY' to the second difference ΔMx';

Judging the size of the ratio and the preset ratio, if it is greater, it is judged that the pressure accessory 401a' is qualified; if it is not greater, it is judged that the pressure accessory 401a' is unqualified.

Here, it is judged whether the pressure accessory 401a' is qualified by calculating the ratio of the increment of the depressing force to the decrement of the lingual resultant torque.

Specifically, the pressure accessory 401a' at this time can simultaneously depress and reduce the lingual resultant moment of the tooth to be corrected. When the above-mentioned ratio is larger, it means that the pressure accessory 401a' can depress and reduce the lingual resultant moment. The better the effect.

Referring to Fig. 41, when the pressure attachment 401 corresponds to the torsion ridge 701b in the third embodiment, the aforementioned step "adding the reference pressure attachment 301 to the intermediate digital dental model 200 to form the target digital dental model 300" is specifically:

A reference pressure attachment 301b is added to the labial and/or lingual area of the tooth to be corrected in the middle digital dental model 300 to form the target digital dental model 300b. The reference pressure attachment 301b is located on one side of the long axis Z of the tooth, and the reference pressure The pressure attachment 301b extends from the incisal end toward the gingival end.

Referring to FIG. 42 , then, a target digital appliance model 400b including a pressure accessory 401b is generated according to the target digital dental model 300b, and the pressure accessory 401b matches the reference pressure accessory 301b.

Step S106 specifically includes:

Calculate the resultant torsional moment My of the teeth to be corrected;

Determine the magnitude of the resultant torsion torque My and the predetermined resultant torsion torque. If it is larger, it is judged that the pressure accessory 401b is qualified; if it is not greater, it is judged that the pressure accessory 401b is unqualified.

Here, it is judged whether the pressure accessory 401a is qualified by calculating the resultant torsion moment My, that is, it is judged whether the expected resultant torsion moment My can be obtained by setting the pressure accessory 401a.

Referring to FIG. 43 , an embodiment of the present application also provides a pressure accessory design system 500 .

The design system 500 includes a memory and a processor 50. The memory stores a computer program that can run on the processor. When the processor executes the computer program, the steps in the above-mentioned pressure accessory design method are realized.

Here, in conjunction with the description of the aforementioned design method, the processor 50 includes the following units:

Dental model acquisition unit 51, configured to acquire the initial digital dental model 100;

The appliance model acquisition unit 52 is configured to acquire the target digital appliance model 400 including the pressure attachment 401;

The simulation unit 53 is used to wear the target digital appliance 400 model on the initial digital dental model 100, and the pressure attachment 401 exerts force on the teeth to be corrected;

Calculation unit 54, configured to calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the teeth to be corrected;

The judging unit 55 is configured to judge whether the pressure accessory 401 is qualified according to the calculation result.

It should be noted that each unit of the processor 50 can also be used to execute other steps in the foregoing design method, for details, reference can be made to the foregoing description, and details will not be repeated here.

An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned pressure accessory design method are realized.

Referring to FIG. 44 , an embodiment of the present application also provides a molding method of a dental orthodontic appliance. Combining with the description of the design method of the aforementioned pressure attachment 401, the molding method includes steps:

Obtain an initial digital dental model 100;

Designing the amount of movement on the initial digital dental model 100 to form an intermediate digital dental model 200;

Here, the amount of motion designed on the initial digital jaw model 100 is the depressive force.

Combined with FIG. 45, an intermediate digital appliance model 600 matching the intermediate digital dental model 200 is generated;

Here, the intermediate digital appliance model 600 is a finite element model without pressure accessories, that is, the intermediate digital appliance model 600 only includes depressive force.

Put the intermediate digital appliance model 600 on the initial digital dental model 100, and the intermediate digital appliance 600 exerts force on the teeth to be corrected;

Calculate the resultant moment Mx ₁ or depression force of the teeth to be corrected;

Judging whether the resultant torque Mx ₁ or the depression force is within the preset range;

If so, then form the dental orthodontic appliance according to the intermediate digital jaw model 200;

If not, add a reference pressure accessory 301 at the intermediate digital dental model 200 to form a target digital appliance model 400 including a pressure accessory 401, and judge whether the pressure accessory is qualified according to the design method of the pressure accessory as described above, and when When the pressure attachment is judged to be qualified, the orthodontic appliance is formed according to the intermediate digital jaw model 200 with the reference pressure attachment 301 , that is, the target digital jaw model 300 is used to form the orthodontic appliance.

It can be seen that the molding method of the dental orthodontic appliance in this embodiment further includes a process of judging whether it is necessary to add a pressure accessory 401 .

That is to say, in this embodiment, before adding the pressure accessory 401 , the intermediate digital appliance model 600 without the pressure accessory is worn on the initial digital jaw model 100 to calculate the stress situation.

If the requirements are met, the dental orthodontic appliance is formed directly according to the intermediate digital jaw model 200 without adding pressure accessories.

If it does not meet the requirements, add a pressure accessory 401 and judge whether the pressure accessory 401 is qualified. When the pressure accessory 401 is qualified, the design quantity of the qualified pressure accessory 401 is reflected to the reference pressure accessory 301, and the reference pressure accessory 301 is adjusted to generate a replacement The final target digitized jaw model 300 , and a dental orthodontic appliance is formed according to the replaced target digital jaw model 300 .

It can be understood that “judging whether the resultant moment Mx ₁ or the depression force is within a preset range” can refer to the judging process in the design method of the pressure accessory 401 mentioned above.

It should be noted that in practice, due to the different degrees of overburden of patients, the angle of inclination of each tooth to be corrected is also different. Not all teeth to be treated will have lip tilt or tongue tilt during the depression process. , or not all the teeth to be corrected need to be further assisted in depression, so it is only necessary to add a pressure accessory to reduce the lip-to-lip torque when the teeth to be treated generate lip-to-lip torque during the depression process. Add a pressure accessory to reduce the tongue-to-toe torque when the resultant torque is obtained, or add a pressure accessory to increase the depressive force when the depressive force is insufficient during the depressing process.

In addition, the final orthodontic appliance can be molded according to the traditional process, that is, the solid solidification model is first formed according to the intermediate digital jaw model 200 (or the target digital jaw model 300 including the reference pressure attachment 301), and then molded by hot pressing film The orthodontic appliance is molded by technology. In other embodiments, the orthodontic appliance can also be directly molded according to the intermediate digital appliance model 600 (or the target digital appliance model 400).

An embodiment of the present application also provides a molding system for a dental orthodontic appliance.

The molding system includes a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the computer program, the above-mentioned steps in the molding method of the dental orthodontic appliance are realized.

Here, the molding system of the dental orthodontic appliance may be the same system as the aforementioned pressure accessory design system 500 , and share the memory and the processor 50 .

Referring to FIG. 46 , the jaw model acquisition unit 51 in the processor 50 is used to acquire the initial digital jaw model 100 and the intermediate digital jaw model 200 formed by designing the action amount on the initial digital jaw model 100 ;

The appliance model acquisition unit 52 is used to generate an intermediate digital appliance model 600 that matches the intermediate digital dental model 200;

The simulation unit 53 is used to wear the intermediate digital appliance model 600 on the initial digital dental model 100, and the intermediate digital appliance 600 exerts force on the teeth to be corrected;

The calculation unit 54 is used to calculate the resultant moment Mx ₁ of the tooth to be treated;

The judging unit 55 is used for judging whether the resultant torque Mx ₁ and the depression force are within a preset range.

The processor 50 may further include a processing unit 56 configured to form an orthodontic appliance according to the judgment result of the judgment unit 55 .

Specifically, if the determination result of the determination unit 55 is yes, the processing unit 56 shapes the dental orthodontic appliance according to the intermediate digital jaw model 200;

If the determination result of the determination unit 55 is negative, the processing unit 56 adds a reference pressure attachment 301 to the intermediate digital dental model 200 to form a target digital appliance model 400 including a pressure attachment 401, and the processor 50 according to the above-mentioned pressure The design method of the attachment judges whether the pressure attachment is qualified, and when the pressure attachment is judged to be qualified, the dental orthodontic appliance is formed according to the intermediate digital jaw model 200 with the reference pressure attachment 301, that is, the target digital jaw model 300 is used to form the orthodontic appliance appliance.

It should be noted that each unit of the processor 50 can also be used to execute other steps in the aforementioned molding method, for details, reference can be made to the aforementioned description, which will not be repeated here.

An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned method for forming a dental orthodontic appliance are realized.

It can be understood that the computer program can simultaneously realize the steps in the above-mentioned method for designing the pressure accessory and the steps in the above-mentioned method for forming the orthodontic appliance.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the application, and they are not intended to limit the protection scope of the application. Any equivalent implementation mode or All changes should be included within the scope of protection of this application.

Claims

A dental orthodontic appliance with a depressed ridge, characterized in that it includes an appliance body forming a cavity for accommodating teeth, and a depressed ridge integrally connected to the appliance body, the depressed ridge includes a cavity facing the cavity The first protrusion protruding from the cavity is arranged corresponding to the incisal end of the tooth to be corrected.
The dental orthodontic appliance according to claim 1, wherein the tooth to be treated is at least one of incisors, canines, and premolars.
The orthodontic appliance according to claim 1, wherein the first protrusion covers the incisal end of the tooth to be corrected along a first direction, and the first direction is a direction from the labial surface to the lingual surface.
The dental orthodontic appliance according to claim 1, wherein the depressing ridge further includes a second protrusion, and the second protrusion is arranged corresponding to the lingual or labial surface of the tooth to be treated.
The dental orthodontic appliance according to claim 4, wherein the first protrusion and the second protrusion are hollow structures that are recessed toward the cavity.
The dental orthodontic appliance according to claim 4, wherein the first protrusions are spliced by a plurality of protrusions distributed at intervals, and/or the second protrusions are formed of a plurality of protrusions distributed at intervals spliced together to form.
The dental orthodontic appliance according to claim 4, wherein the force application direction of the first protrusion is perpendicular to the incisal end of the tooth to be treated, and the force application direction of the second protrusion is perpendicular to the tooth to be treated tongue or lips.
The orthodontic appliance according to claim 4, wherein the second protrusion is located between the incisal end of the tooth to be treated and the lingual fossa.
The dental orthodontic appliance according to claim 4, wherein the second protrusion is disposed adjacent to the first protrusion, and there is a gap between the second protrusion and the first protrusion .
The dental orthodontic appliance according to claim 4, wherein the first protrusion and the second protrusion are connected to each other.
The dental orthodontic appliance according to claim 4, characterized in that, the longitudinal section of the depressed ridge along the second direction is L-shaped, and the second direction is the direction in which the incisal end of the tooth to be treated faces the gingival end, and the The longitudinal section passes through the first protrusion and the second protrusion at the same time.
The orthodontic appliance according to claim 4, wherein the depressing ridge is configured such that when the second protrusion is expanded to be flush with the first protrusion, the outer surface of the depressing ridge The outline is one of strip shape, square shape, circle shape, oval shape, obtuse angle shape, crescent shape, wavy shape and broken line shape.
The dental orthodontic appliance according to claim 4, characterized in that the maximum depth of the depressed ridge is in the range of 0.05mm-0.5mm.
The dental orthodontic appliance according to claim 4, wherein the area of the opening where the depressing ridge is connected to the appliance body is in the range of 0.5 mm 2 -18 mm 2 .
The dental orthodontic appliance according to claim 4, characterized in that, the area of the opening where the depressing ridge connects the appliance body is equal to the contact area between the depressing ridge and the teeth to be corrected.
The dental orthodontic appliance according to claim 4, wherein when the depressing ridge is located on the side of the long axis of the tooth close to the mesial plane, the first minimum distance between the depressing ridge and the mesial plane is The distance ranges from 0.5 mm to 3 mm, and when the depressing ridge is located on the side of the long axis of the tooth close to the distal surface, the second minimum distance between the depressing ridge and the distal surface ranges from 0.5 mm to 3 mm .
The dental orthodontic appliance according to claim 16, wherein the range of the first minimum distance is 1mm-2mm, and the range of the second minimum distance is 1mm-2mm.
The dental orthodontic appliance according to claim 4, wherein the third minimum distance between the bottom edge of the second protrusion near the gingival end and the gingival end is in the range of 0.5mm-3mm.
The dental orthodontic appliance according to claim 18, wherein the range of the third minimum distance is 1mm-2mm.
The dental orthodontic appliance according to claim 1, characterized in that, corresponding to a tooth to be treated, the dental orthodontic appliance has a plurality of depressed ridges distributed at intervals.
The dental orthodontic appliance according to claim 20, characterized in that the dental orthodontic appliance has two depressing ridges, and the two depressing ridges are respectively located on both sides of the long axis of the same tooth to be treated.
The dental orthodontic appliance according to claim 1, wherein the dental orthodontic appliance has a plurality of depressed ridges corresponding to a plurality of teeth to be treated.
A dental orthodontic appliance with a twisted ridge, characterized in that it includes an appliance body forming a cavity for accommodating teeth, and a twisted ridge integrally connected to the appliance body, the torsional ridge facing the cavity The twisted ridge is set corresponding to the lingual and/or labial surface of the tooth to be corrected, and the twisted ridge is located on one side of the long axis of the tooth, and the extension direction of the twisted ridge is that the incisal end of the tooth to be treated faces the gingiva The direction of the end, the teeth to be corrected are incisors or canines.
The orthodontic appliance of claim 23, wherein the torsion ridge is a hollow structure recessed toward the cavity.
The dental orthodontic appliance according to claim 23, wherein the torsion ridge is a continuous structure.
The dental orthodontic appliance according to claim 23, wherein the torsion ridge is formed by splicing a plurality of protrusions distributed at intervals.
The dental orthodontic appliance according to claim 23, characterized in that, the outer contour of the torsion ridge is in the shape of a strip, a square, a circle, an ellipse, an obtuse angle, a crescent, a wave, or a broken line. one.
The dental orthodontic appliance according to claim 23, wherein the maximum depth of the torsion ridge is in the range of 0.1mm-1mm.
The dental orthodontic appliance according to claim 23, wherein the area of the opening where the twisted ridge connects to the appliance body is in the range of 0.25 mm 2 -36 mm 2 .
The dental orthodontic appliance according to claim 29, wherein the area of the opening is in the range of 1 mm 2 -12 mm 2 .
The dental orthodontic appliance according to claim 23, wherein the area of the opening where the twisted ridge connects to the appliance body is equal to the contact area between the twisted ridge and the teeth to be corrected.
The dental orthodontic appliance according to claim 23, wherein the tooth to be treated has a first maximum width in the direction from the mesial plane to the distal plane, and the center of the twisted ridge is as long as the length of the tooth body. The first vertical distance between the axes is not less than 1/10 of said first maximum width.
The orthodontic appliance of claim 32, wherein the second vertical distance between the center of the twist ridge and the proximal or distal surface of the twist ridge is not less than the first 1/10 of the maximum width.
The dental orthodontic appliance according to claim 33, wherein the first vertical distance and the second vertical distance are not less than 1/5 of the first maximum width.
The orthodontic appliance according to claim 23, wherein the tooth to be treated has a first maximum height in the direction from the incisal end to the gingival end, and the height of the twisted ridge in the direction from the incisal end to the gingival end is not greater than 80% of the first maximum height.
35. The orthodontic appliance of claim 35, wherein said height is no greater than 60% of said first maximum height.
35. The orthodontic appliance of claim 35, wherein said height is not less than 10% of said first maximum height.
The dental orthodontic appliance according to claim 23, characterized in that, the force application direction of the torsion ridge is perpendicular to the lingual and/or labial surfaces of the teeth to be treated.
The dental orthodontic appliance according to claim 23, wherein, corresponding to a tooth to be treated, the dental orthodontic appliance has a plurality of torsion ridges distributed at intervals.
The dental orthodontic appliance according to claim 39, wherein a plurality of twisted ridges are located on the lingual surface of the same tooth to be treated, or a plurality of twisted ridges are located on the labial surface of the same tooth to be treated.
The orthodontic appliance according to claim 39, wherein the plurality of torsion ridges are respectively located on the lingual and labial surfaces of the same tooth to be treated, and the plurality of torsion ridges are staggered from each other.
The dental orthodontic appliance according to claim 23, wherein the dental orthodontic appliance has a plurality of twisted ridges corresponding to a plurality of teeth to be treated.
A method for designing a pressure accessory, characterized in that it comprises the steps of:

Obtain the initial digital dental model;

Obtain a target digital appliance model including pressure attachments;

wearing the target digital appliance model on the initial digital jaw model, and the pressure attachment exerts force on the teeth to be corrected;

Calculating at least one of the resultant moment, the depression force, and the deformation of the target digital appliance model on the teeth to be corrected;

Judging whether the pressure accessory is qualified according to the calculation result.
The design method according to claim 43, wherein the step "obtaining a target digital appliance model including pressure accessories" specifically includes:

Designing the amount of movement on the initial digital dental model to form an intermediate digital dental model;

Adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model;

A target digital appliance model including a pressure accessory is generated according to the target digital dental model, and the pressure accessory matches the reference pressure accessory.
The design method according to claim 44, characterized in that the step "designing the amount of movement on the initial digital dental model to form an intermediate digital dental model" specifically includes:

A depressive force is designed on the initial digital dental model to form an intermediate digital dental model.
The design method according to claim 44, wherein the step of "generating a target digital appliance model containing pressure accessories according to the target digital dental model" specifically includes:

A target digital appliance model is generated according to the target digital dental model, and the target digital appliance model includes an integrated negative pressure attachment and a shell-shaped appliance model.
The design method according to claim 44, wherein the step "adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model" specifically includes:

A reference pressure attachment is added to the lingual prominence region of the teeth to be corrected in the intermediate digital dental model to form a target digital dental model.
The design method according to claim 47, characterized in that the step "calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge according to the calculation result "Whether the pressure accessories are qualified" specifically includes:

Calculating the lip-to-lip moment of the teeth to be corrected;

Judging the magnitude of the combined lip torque and the preset lip torque, if it is greater, it is judged that the pressure accessory is unqualified; if it is not greater, it is judged that the pressure accessory is qualified.
The design method according to claim 47, characterized in that the step "calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge according to the calculation result "Whether the pressure accessories are qualified" specifically includes:

Calculating the labial engagement moment of the teeth to be corrected and the deformation of the target digital appliance model;

Judging the size of the lip joint moment and the preset lip joint torque and the deformation amount and the preset deformation amount, if at least one of them is greater than, it is judged that the pressure accessory is unqualified; if neither is greater than , it is judged that the pressure accessory is qualified.
The design method according to claim 44, wherein the step "adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model" specifically includes:

A reference pressure attachment is added to the incisal end of the tooth to be treated in the intermediate digital dental model to form a target digital dental model.
The design method according to claim 50, characterized in that the step "calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge according to the calculation result "Whether the pressure accessories are qualified" specifically includes:

Generating an intermediate digital appliance model matching the intermediate digital dental model;

wearing the intermediate digital appliance model on the initial digital jaw model, and calculating the initial depression force obtained by the teeth to be corrected;

calculating the current depression force obtained by the teeth to be treated when the target digital appliance model is worn on the initial digital jaw model;

calculating a first difference between the current depression force and the initial depression force;

Judging the size of the first difference and the preset difference, if greater, then judging that the pressure accessory is qualified; if not greater, then judging that the pressure accessory is unqualified.
The design method according to claim 44, wherein the step "adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model" specifically includes:

A target digital jaw model is formed by adding a reference pressure attachment to the incisal end and lingual side of the teeth to be treated in the intermediate digital jaw model.
The design method according to claim 52, characterized in that the step "calculate at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge according to the calculation result "Whether the pressure accessories are qualified" specifically includes:

Generating an intermediate digital appliance model matching the intermediate digital dental model;

Wearing the intermediate digital appliance model on the initial digital jaw model, calculating the initial depression force and initial lingual joint moment of the teeth to be treated;

Calculating the current depressive force and current lingual combined torque obtained by the teeth to be treated when the target digital appliance model is worn on the initial digital jaw model;

calculating a first difference between the current depressing force and the initial depressing force, and calculating a second difference between the initial lingual resultant moment and the current lingual resultant moment, and calculating the first difference and a ratio of said second difference;

Judging the size of the ratio and the preset ratio, if it is greater, it is judged that the pressure accessory is qualified; if it is not greater, it is judged that the pressure accessory is unqualified.
The design method according to claim 44, wherein the step "adding a reference pressure attachment to the intermediate digital dental model to form a target digital dental model" specifically includes:

Add a reference pressure attachment to the labial and/or lingual area of the teeth to be corrected in the intermediate digital jaw model to form a target digital jaw model, the reference pressure attachment is located on one side of the long axis of the tooth, and the The reference pressure attachment extends from the incisal end toward the gingival end.
The design method according to claim 54, characterized in that the step "calculates at least one of the resultant moment, depression force, and deformation of the target digital appliance model on the tooth to be corrected; judge according to the calculation result "Whether the pressure accessories are qualified" specifically includes:

Calculating the resultant torsion moment of the teeth to be corrected;

Judging the magnitude of the torsion resultant torque and the preset torsion resultant moment, if it is larger, it is judged that the pressure accessory is qualified; if it is not greater, it is judged that the pressure accessory is unqualified.
The design method according to claim 43, wherein the step of "calculating at least one of the resultant moment, depression force, and deformation of the target digital appliance model" on the tooth to be treated specifically includes:

When the interaction between the target digital appliance model and the initial digital dental model reaches a balance, calculate the resultant moment, depression force, and deformation of the target digital appliance model on the teeth to be treated at least one of them.
The design method according to claim 43, further comprising the steps of:

When it is judged that the pressure accessory is unqualified, adjusting the design value of the pressure accessory to replace the pressure accessory on the target digital appliance model;

Continue to judge whether the pressure accessories are qualified.
The design method according to claim 57, wherein the step "adjusting the design value of the pressure accessory" specifically includes:

Adjust the size and setting position of the pressure accessories.
The design method according to claim 57, wherein the step "continue to judge whether the pressure accessory is qualified" specifically includes:

If it is judged that the pressure accessory is unqualified and the design value of the pressure accessory reaches the limit value, the limit value is used as the final design value of the pressure accessory.
The design method according to claim 43, wherein the step "obtaining an initial digital dental model" specifically includes:

An initial digital jaw model is obtained, and the initial digital jaw model includes a digital grid model of multiple teeth with roots, a digital grid model of periodontal ligament, and a digital grid model of alveolar bone.
The design method according to claim 60, wherein the step of "calculating at least one of the resultant moment, depression force, and deformation of the target digital appliance model" on the tooth to be corrected specifically includes:

At least one of the resultant moment, the depression force, and the deformation amount of the target digital appliance model subjected to the teeth to be corrected is calculated by using a finite element analysis method.
A pressure accessory design system, characterized in that the design system includes a memory and a processor, the memory stores a computer program that can run on the processor, and when the processor executes the computer program, The steps in the design method of the pressure accessory described in any one of claims 43-61 are realized.
A computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps in the method for designing a pressure accessory according to any one of claims 43-61 are realized.
A molding method for a dental orthodontic appliance, comprising the steps of:

Obtain the initial digital dental model;

Designing the amount of movement on the initial digital dental model to form an intermediate digital dental model;

Generating an intermediate digital appliance model matching the intermediate digital dental model;

Wearing the intermediate digital appliance model on the initial digital jaw model, the intermediate digital appliance applies force to the teeth to be corrected;

Calculating the resultant moment or depression force on the teeth to be corrected;

judging whether the resultant torque or the depression force is within a preset range;

If so, forming a dental orthodontic appliance according to the intermediate digital jaw model;

If not, add a reference pressure accessory to the intermediate digital dental model to form a target digital appliance model including a pressure accessory, and judge the pressure accessory according to the design method of any one of claims 43-61. Whether the pressure accessory is qualified, and when it is judged that the pressure accessory is qualified, a dental orthodontic appliance is formed according to the intermediate digital jaw model with the reference pressure accessory added.
A molding system for a dental orthodontic appliance, characterized in that the molding system includes a memory and a processor, the memory stores a computer program that can run on the processor, and the processor executes the computer During the procedure, the steps in the molding method of the dental orthodontic appliance described in claim 64 are realized.
A computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps in the method for forming a dental orthodontic appliance according to claim 64 are implemented.