Accessory of invisible appliance, manufacturing method and computer program product

Abstract

The invention discloses an accessory of an invisible orthodontic appliance, a manufacturing method and a computer program product, the accessory of the invisible orthodontic appliance can be arranged on a tooth, and comprises an accessory body, an accessory cover and an accessory cover, the traction component is connected with the accessory body; and the traction component and the accessory body are integrally manufactured. By integrally manufacturing the traction component and the accessory body, the problems that in the prior art, accessories are complex in manufacturing, low in precision, prone to falling off and the like are solved, the manufacturing process of the accessories is simplified, the precision and stability of the accessories are improved, and the technical difficulty and time cost in clinical operation are reduced. Meanwhile, due to the integrated design, the accessory can better transmit correction force in the correction process, and the correction effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dental orthodontics, and particularly relates to an attachment for an invisible orthodontic appliance, a manufacturing method thereof, and a computer program product. Background Art

[0002] In the development history of oral orthodontic treatment technology, the emergence of the bracketless invisible orthodontic technology has epoch-making symbolic significance. Compared with traditional orthodontic appliances, invisible orthodontic appliances are more aesthetically pleasing, comfortable, and easier to maintain oral health, and have developed rapidly in recent years.

[0003] As one of the most important components, the attachment plays a crucial role in effectively moving teeth by the orthodontic appliance. However, the current method of directly forming the attachment using light-curing resin in clinical practice has relatively high requirements for doctors' clinical operation skills, and the formed attachment has low precision, and is prone to problems such as excessive, too small, or inconsistent shapes in appearance defects. Moreover, filling and forming with light-curing resin material is highly sensitive to operation, time-consuming; the attachment after forming and curing is difficult to repair, time-consuming and laborious, and has relatively high requirements for doctors' skills.

[0004] In addition, for some specific types of tooth movement, relying solely on the invisible dental appliance itself is not sufficient to achieve sufficiently effective control. For example, for the overall mesial movement of posterior teeth and the existing mesial inclination of the crown, currently in clinical practice, it mainly relies on making a long-arm traction hook embedded in a resin vertical rectangular attachment to increase the control force. By applying a traction force to the long-arm traction hook, the line of force can be closer to the center of resistance, increasing the overall control of tooth movement. There are still many obvious defects in the current long-arm traction hook: First, the current manufacturing methods of the long-arm traction hook mainly use preformed question mark-shaped traction hooks or orthodontists bending stainless steel wires. The former has limited length and lack of adjustability, while the latter consumes a large amount of clinical time, and both have a relatively high problem of falling off; the main reason is that the combination of the base part of the traction hook and the rectangular attachment is not firm enough, and after embedding the traction hook, the rectangular attachment itself changes from a solid body to a thin-shell object, and its strength decreases and is prone to cracking. Second, limited by the shape of its base, the long-arm traction hook can only be matched with a rectangular attachment, and cannot be combined with other more effective attachment for controlling the axial inclination or multi-functional multi-plane optimization, and the help ability of the attachment body to control teeth is limited. Summary of the Invention

[0005] In order to solve the deficiencies of the above-mentioned prior art, a first aspect of the present invention discloses an attachment for an invisible orthodontic appliance, which can be set on a tooth and includes:

[0006] An attachment body that can be set on the tooth surface of the tooth;

[0007] A traction component connected to the attachment body;

[0008] The traction component is integrally formed with the accessory body.

[0009] A further technical solution may also be that the accessory of the invisible aligner further includes:

[0010] The traction component includes:

[0011] A head for externally connecting an elastic component to apply a traction force to the accessory;

[0012] A rod-shaped part, with both ends of the rod-shaped part respectively connected to the accessory body and the head.

[0013] A further technical solution may also be that a number of branches are provided on the rod-shaped part, and the branches are used to provide additional traction interfaces.

[0014] A further technical solution may also be that the head is arranged on a locus line, and the locus line is perpendicular to the connection line defined by taking the connection part of the rod-shaped part and the accessory body as one end point and the impedance center of the tooth as the other end point.

[0015] A further technical solution may also be that the shape of the rod-shaped part conforms to the outer contour of the gingiva of the tooth, so that the distance between the rod-shaped part and the gingiva is kept within the range of 2 mm to 5 mm.

[0016] A further technical solution may also be that the surface of the accessory body in contact with the tooth surface has a microporous structure, and the pore diameter of the microporous structure is within the range of 10 microns to 200 microns.

[0017] A further technical solution may also be that the accessory body has a crescent shape.

[0018] A second aspect of the present invention also discloses a manufacturing method of an accessory of an invisible aligner, including the following steps:

[0019] According to the force application requirements of the invisible aligner on the teeth, determine the installation position and shape of the accessory body;

[0020] Fit the oral CT data and the oral scan data, and calculate the actual impedance center of the tooth;

[0021] According to the position of the tooth impedance center and the movement mode of the orthodontic tooth, design the force line for applying force, and determine the position and shape of the head of the traction component;

[0022] According to the determined installation position of the accessory body and the position of the head of the traction component, determine the shape of the rod-shaped part of the traction component;

[0023] According to the determined shapes of the accessory body and the traction component, generate a three-dimensional model of the accessory.

[0024] The accessory is manufactured by 3D printing.

[0025] The third aspect of the present invention also discloses a computer program product. When the computer program in the computer program product is executed, the following steps can be implemented:

[0026] Obtain oral scan data and oral CT data, and generate a three-dimensional tooth model;

[0027] Fit the CT data and the oral scan, and calculate the impedance center of the teeth in the three-dimensional tooth model;

[0028] According to the orthodontic parameters of the teeth in the three-dimensional tooth model, generate a model of the accessory body on the surface of the three-dimensional tooth model for confirming the installation position and shape of the accessory body;

[0029] According to the location and orthodontic parameters of the tooth impedance center, determine the location and shape of the head of the traction component;

[0030] According to the determined installation position of the accessory body and the location of the head of the traction component, determine the shape of the rod-shaped part of the traction component;

[0031] Further generate a three-dimensional model of the traction component on the model of the accessory body;

[0032] Send the three-dimensional model of the accessory to a 3D printing device for manufacturing.

[0033] A further technical solution may also be that the three-dimensional model of the accessory is generated by artificial intelligence; the position of the impedance center of the teeth in the digital model is automatically calculated by artificial intelligence;

[0034] The artificial intelligence has an accessory generation model, and the accessory generation model is obtained by learning a data training set for accessory generation.

[0035] A further technical solution may also be that before the step of sending the three-dimensional model of the accessory to the 3D printing device, it further includes:

[0036] In response to an adjustment of the installation position and shape of the accessory body and / or the traction component,

[0037] Regenerate the three-dimensional model of the accessory;

[0038] When an adjustment occurs, add the adjusted three-dimensional model of the accessory to the data training set to improve the accuracy of the three-dimensional model generation of the accessory generation model.

[0039] A further technical solution may also be that, after the step of further generating a three-dimensional model of the traction component on the model of the attachment body, the following steps are further included:

[0040] In response to a dragging action on the head of the traction component, display the movement of the head being dragged along a trajectory line;

[0041] The trajectory line is perpendicular to the connection line defined by taking the connection part of the rod-shaped part and the attachment body as one endpoint and the impedance center of the tooth as the other endpoint.

[0042] A further technical solution may also be that, in the step of further generating a three-dimensional model of the traction component on the model of the attachment body according to the position of the impedance center of the tooth in the three-dimensional model of the tooth and the orthodontic parameters, the distance between the generated three-dimensional model of the traction component and the gingival outer contour of the three-dimensional model of the tooth is kept within the range of 2 mm to 5 mm.

[0043] A further technical solution may also be that, in the step of generating a model of the attachment body on the surface of the three-dimensional model of the tooth according to the orthodontic parameters of the tooth in the three-dimensional model of the tooth,

[0044] Generate a microporous structure on the surface of the attachment body that contacts the tooth surface of the tooth, and the pore diameter of the microporous structure is within the range of 10 microns to 200 microns.

[0045] By integrally manufacturing the traction component and the attachment body, the present invention solves the problems in the prior art such as complex attachment manufacturing, low precision, and easy detachment, simplifies the manufacturing process of the attachment, improves the precision and stability of the attachment, and reduces the technical difficulty and time cost in clinical operations. At the same time, the integrated design enables the attachment to better transmit the orthodontic force during the orthodontic process, and can freely set the shape of the attachment body according to the treatment needs, enhancing the control of tooth movement and improving the orthodontic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0047] Figure 1 It is a schematic structural diagram of the attachment of the invisible orthodontic appliance in the embodiment of the present invention;

[0048] Figure 2 It is a schematic structural diagram of the attachment from another angle in the embodiment of the present invention;

[0049] Figure 3 Another structural schematic diagram of the attachment in the embodiment of the present invention;

[0050] Figure 4 Another structural schematic diagram of the attachment in the embodiment of the present invention;

[0051] Figure 5 It is a schematic flow chart of the manufacturing method of the attachment of the invisible aligner in the embodiment of the present invention.

[0052] Explanation of reference numerals:

[0053] A, tooth;

[0054] 1, attachment body;

[0055] 2, traction component; 21, head; 22, rod-shaped part; 23, branch. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0057] The inventor found that there are many problems with the method of directly forming attachments using photocuring resin currently used clinically. First of all, this method has relatively high requirements for doctors' clinical operation skills, and the formed attachments have low accuracy and are prone to appearance defects, such as being too large, too small or having inconsistent shapes. Secondly, using photocuring resin materials for filling and forming is highly sensitive to operation and takes a long time. The attachment after forming and curing is difficult to modify, time-consuming and laborious, and has relatively high requirements for doctors' skills.

[0058] In addition, for the long-arm hook attachment, the existing manufacturing method is relatively complex, and it is prone to the problem that the position of the long-arm hook deviates from the designed position due to the unstable position during bonding, and it is difficult to meet the mechanical performance requirements well. Since resin is needed to bond the long-arm hook, the resin is prone to breakage during polymerization due to the instability of the long-arm hook during resin photocuring, resulting in a high detachment rate of the attachment. In addition, the resin shell formed when using resin to bond the long-arm hook is too thin, which also easily leads to a high detachment rate of the attachment.

[0059] Embodiment 1

[0060] To solve the above problems, in the first aspect of this embodiment, an attachment of an invisible aligner is disclosed, which can be set on tooth A, as Figure 1 shown, including:

[0061] An attachment body 1, which can be set on the tooth surface of the tooth A;

[0062] A traction component 2, connected to the attachment body 1;

[0063] The traction component 2 and the attachment body 1 are integrally manufactured.

[0064] In this embodiment, the attachment body 1 is an important part of the invisible orthodontic appliance, which directly contacts the tooth surface of the tooth A. The design of the attachment body 1 needs to consider the fitting degree and stability with the tooth A to ensure that the orthodontic force can be effectively transmitted during the orthodontic process. The traction component 2 is connected to the attachment body 1 and is used to apply a traction force to move the tooth A. The integral manufacturing method of the traction component 2 and the attachment body 1 can improve the overall strength and stability of the attachment.

[0065] It is worth mentioning that for the attachment in this embodiment, since the traction component 2 and the attachment body 1 are integrally manufactured, compared with the existing resin molding method, the outer shape accuracy is higher, the installation time is shorter, and the requirements for operation are lower. Moreover, since the traction component 2 and the attachment body 1 are integrally manufactured, on the one hand, there is no need to consider the problem of deviation from the designed position caused by the unstable position of the traction component 2 during resin curing, which can effectively improve the installation accuracy; on the other hand, the integral structure can also effectively improve the structural stability.

[0066] In this embodiment, the attachment solves the problems of complex manufacturing, low accuracy, easy detachment, etc. of the attachment in the prior art by integrally manufacturing the traction component 2 and the attachment body 1, simplifies the manufacturing process of the attachment, improves the accuracy and stability of the attachment, and reduces the technical difficulty and time cost in clinical operation. At the same time, the integral design enables the attachment to better transmit the orthodontic force during the orthodontic process and improves the orthodontic effect.

[0067] Correspondingly, in the second aspect of this embodiment, a manufacturing method of an attachment of an invisible orthodontic appliance is also disclosed, as Figure 5 shown, including the following steps:

[0068] According to the force application requirements of the invisible orthodontic appliance on the tooth A, determine the installation position and shape of the attachment body 1;

[0069] Fit the oral CT data and the intraoral scan data, and calculate the actual impedance center of the tooth A;

[0070] According to the position of the impedance center of the tooth A and the movement mode of the orthodontic tooth, design the force line for applying force, and determine the position and shape of the head of the traction component 2;

[0071] Determine the shape of the rod-shaped portion of the traction member 2 based on the determined installation position of the attachment body 1 and the position of the head of the traction member 2.

[0072] Generate a three-dimensional model of the attachment based on the determined shapes of the attachment body 1 and the traction member 2.

[0073] Manufacture the attachment by 3D printing.

[0074] The third aspect of this embodiment also discloses a computer program product. When the computer program in the computer program product is executed, it can implement the following steps:

[0075] Obtain oral scan data and oral CT data, and generate a three-dimensional model of the teeth.

[0076] Fit the CT data and the oral scan, and calculate the impedance center of tooth A in the three-dimensional model of the teeth.

[0077] Generate a model of the attachment body 1 on the surface of the three-dimensional model of the teeth according to the orthodontic parameters of tooth A in the three-dimensional model of the teeth, for confirming the installation position and shape of the attachment body 1.

[0078] Determine the position and shape of the head of the traction member 2 based on the position of the impedance center of tooth A and the orthodontic parameters.

[0079] Determine the shape of the rod-shaped portion of the traction member 2 based on the determined installation position of the attachment body 1 and the position of the head of the traction member 2.

[0080] Further generate a three-dimensional model of the traction member 2 on the model of the attachment body 1.

[0081] Send the three-dimensional model of the attachment to a 3D printing device for manufacturing.

[0082] This computer program product generates a three-dimensional model of the teeth, fits the CT data and the oral scan data, calculates the impedance center of tooth A, thereby accurately determining the installation position and shape of the attachment. By generating three-dimensional models of the attachment body 1 and the traction member 2 and sending them to the 3D printing device, the manufacturing accuracy and stability of the attachment are ensured, the operation difficulty of doctors is reduced, and the orthodontic effect is improved.

[0083] The three-dimensional tooth model is generated by acquiring oral scan data and oral CT data. The center of resistance of Tooth A is calculated by fitting the CT data and the oral scan. The orthodontic parameters are used to determine the installation position and shape of the attachment body 1. The head position and shape of the traction member 2 are determined according to the position of the center of resistance of Tooth A and the orthodontic parameters. The rod shape of the traction member 2 is determined according to the installation position of the attachment body 1 and the position of the head of the traction member 2. The three-dimensional model of the attachment is finally fabricated by a 3D printing device.

[0084] Compared with the prior art, in this embodiment, the three-dimensional tooth model and the three-dimensional attachment model are generated by a computer program, ensuring the fabrication accuracy and stability of the attachment, reducing the operation difficulty of doctors, and improving the orthodontic effect. The prior art method of directly forming the attachment using photocuring resin has problems such as low accuracy, complex operation, and long time consumption. However, in this application, the attachment is fabricated by 3D printing technology, overcoming these problems and improving the fabrication efficiency and use effect of the invisible orthodontic attachment.

[0085] In some preferred embodiments, the three-dimensional model of the attachment is generated by artificial intelligence; the position of the center of resistance of the teeth in the digital model is automatically calculated by artificial intelligence;

[0086] The artificial intelligence has an attachment generation model, and the attachment generation model is obtained by learning a data training set for attachment generation.

[0087] Using artificial intelligence technology to generate the three-dimensional model of the attachment, the artificial intelligence can automatically generate an accurate attachment model by learning a large number of data training sets for attachment generation. In this way, the generation efficiency and accuracy of the attachment model can be significantly improved, and the error of manual operation can be reduced. Specifically, the artificial intelligence model can learn the shape and installation position of the attachment from a large amount of historical data and generate the corresponding three-dimensional model when new data is input. This method not only improves the production efficiency but also ensures the consistency and reliability of the generated model.

[0088] The implementation method of the artificial intelligence to generate the attachment model can be various. For example, a convolutional neural network (CNN) can be used to learn and generate the attachment shape, or a generative adversarial network (GAN) can be used for model optimization. In addition, the artificial intelligence model can be continuously updated and optimized. By adding new data training sets, the accuracy and adaptability of the generated model can be further improved. Specifically, when the attachment body 1 and / or the traction member 2 are adjusted, the new model data can be added to the data training set for the artificial intelligence model to be retrained and optimized, thereby improving the accuracy and reliability of the generated model.

[0089] In this embodiment, by introducing artificial intelligence technology, the problems of low accuracy and low efficiency in manually generating attachment models in the prior art are solved. Compared with the prior art, the artificial intelligence generation model method not only improves the accuracy and consistency of model generation, but also reduces the dependence on doctors' operation techniques, lowers the operation difficulty, thereby improving the production efficiency and usage effect of the invisible orthodontic appliance attachments. Thus, the method of generating a model by artificial intelligence has important technical advantages and can significantly improve the overall level of invisible orthodontic technology.

[0090] It should be noted that in this embodiment, the attachment generation model is obtained by learning the data training set for attachment generation. Specifically, at the initial stage, the attachment production model can use existing clinical data and attachment data as the initial data training set. The data generated from each subsequent treatment is input into the data training set. The attachment generation model can be continuously trained through the gradually expanding data training set to improve the accuracy of the three-dimensional model of the attachments it generates. It is worth mentioning that the three-dimensional model of the attachments generated by artificial intelligence can optimize the model generation effect by adjusting the learning data set and training parameters. Specifically, the generalization ability and accuracy of the model can be improved by increasing the sample quantity and diversity of the data training set. In addition, the performance of the model can be further improved by adjusting the hyperparameters of the model, such as the learning rate, the number of network layers, etc.

[0091] In some embodiments, before the step of sending the three-dimensional model of the attachment to the 3D printing device, it further includes:

[0092] In response to the adjustment of the installation position and form of the attachment body 1 and / or the traction component 2,

[0093] Regenerate the three-dimensional model of the attachment;

[0094] When an adjustment occurs, add the three-dimensional model of the adjusted attachment to the data training set to improve the accuracy of the three-dimensional model generation of the attachment generation model.

[0095] In this way, when the installation position and form of the attachment body 1 and / or the traction component 2 are adjusted, the three-dimensional model can be updated in a timely manner, and the adjusted model data is added to the data training set for learning, thereby continuously optimizing and improving the accuracy of the attachment generation model. After the doctor adjusts the installation position and form of the attachment body 1 and / or the traction component 2 according to the specific situation of the patient, the system will automatically regenerate the three-dimensional model of the attachment and add the adjusted model data to the data training set. By continuously accumulating and learning these adjusted data, the artificial intelligence model can be more accurate when generating a new three-dimensional model of the attachment, reducing the number and difficulty of manual adjustments.

[0096] Embodiment 2

[0097] This embodiment is a further improvement based on the first embodiment, and the improvement lies in: the attachments of the invisible orthodontic appliance, such as Figure 1 and Figure 2 shown, further includes:

[0098] The traction member 2 includes:

[0099] A head 21 for externally connecting an elastic member to apply a traction force to the attachment;

[0100] A rod-shaped portion 22, with both ends of the rod-shaped portion 22 connected to the attachment body 1 and the head 21 respectively.

[0101] The head 21 of the traction member 2 is designed to be able to externally connect an elastic member so as to apply the required traction force to the attachment during the orthodontic process. The rod-shaped portion 22 serves as a bridge connecting the attachment body 1 and the head 21, and its both ends are firmly connected to the attachment body 1 and the head 21 respectively to ensure the effective transmission of the traction force. The design of the rod-shaped portion 22 can be adjusted according to actual needs, such as its length, diameter, and shape, etc., to adapt to different orthodontic requirements.

[0102] In some embodiments, the head 21 is arranged on a locus line, and the locus line is perpendicular to the connection line defined by taking the connection part of the rod-shaped portion 22 and the attachment body 1 as one end point and the impedance center of the tooth as the other end point.

[0103] Specifically, the position of the head 21 is designed on a specific locus line, and this locus line is perpendicular to the connection line from the connection part of the rod-shaped portion 22 and the attachment body 1 to the impedance center. This design ensures the stability and accuracy of the head 21 when applying the traction force, and can effectively avoid uneven or ineffective traction force caused by position deviation, thereby improving the overall performance and reliability of the orthodontic appliance. In some embodiments, the setting of the locus line can be accurately calculated and simulated through computer-aided design software to ensure that the tooth A can accurately move along the preset locus during actual operation. In addition, in some other embodiments, the setting of the locus line can also be adjusted in combination with the specific shape of the tooth A and the orthodontic requirements to optimize the traction effect.

[0104] Correspondingly, after the step of further generating a three-dimensional model of the traction member 2 on the model of the attachment body 1, it further includes:

[0105] In response to a dragging action on the head 21 of the traction member 2, display the movement of the head 21 being dragged along a locus line;

[0106] The locus line is perpendicular to the connecting line defined with the connection part of the rod-shaped part 22 and the attachment body 1 as one end point and the impedance center of the tooth as the other end point.

[0107] By responding to the dragging action on the head 21 of the traction member 2, the system can display the movement locus of the head 21 along the locus line in real time, enabling the doctor to more intuitively observe and control its position and shape when adjusting the traction member 2. This visual adjustment method not only reduces the complexity of the operation but also improves the installation accuracy, ensuring that the traction member 2 can better meet the mechanical requirements of orthodontic treatment. Specifically, first, by displaying the movement locus of the head 21 of the traction member 2 in real time, the doctor can make adjustments more intuitively, reducing the complexity and time cost of the operation. Second, due to the definition method that the locus line is perpendicular to the connecting line, it ensures that the adjustment of the traction member 2 can accurately meet the mechanical requirements, thereby improving the stability of the attachment and the treatment effect. Finally, by introducing technical means such as real-time rendering and physical simulation, the operation experience and precision of the system are further improved, providing a more convenient and efficient tool for the doctor. Thus, this embodiment not only solves the problems of complex operation and low precision in the prior art but also significantly improves the production efficiency and use effect of the invisible orthodontic appliance attachment.

[0108] In some embodiments, as Figure 2 shown, the shape of the rod-shaped part 22 conforms to the outer contour of the gingiva of the tooth A and keeps the distance between the rod-shaped part 22 and the gingiva within the range of 2 mm to 5 mm.

[0109] In this embodiment, by optimizing the shape design of the rod-shaped part 22, on the one hand, the shape of the rod-shaped part 22 is designed to conform to the outer contour of the gingiva of the tooth A, so that when the rod-shaped part 22 is pressed and abuts against the gingiva, it can effectively distribute the pressure evenly and avoid the situation of excessive pressure at local positions; on the other hand, keeping the distance between the rod-shaped part 22 and the gingiva within the range of 2 mm to 5 mm creates a gap between the rod-shaped part 22 and the gingiva, providing space for the rod-shaped part 22 to deform, thereby effectively reducing the compression and friction of the rod-shaped part 22 on the gingiva, improving the comfort of the patient. Moreover, restricting the distance within the range of 2 - 5 mm can reduce the foreign body sensation in the oral cavity.

[0110] Correspondingly, in the step of further generating the three-dimensional model of the traction member 2 on the model of the attachment body 1 according to the location of the impedance center of the tooth A in the three-dimensional tooth model and the orthodontic parameters, the distance between the generated three-dimensional model of the traction member 2 and the outer contour of the gingiva of the three-dimensional model of the tooth A is kept within the range of 2 mm to 5 mm.

[0111] In some preferred embodiments, as Figure 3As shown, the rod-shaped portion 22 is further provided with a plurality of branches 23 , and the branches 23 are used to provide additional traction interfaces.

[0112] By providing multiple branches 23, the rod-shaped portion 22 can provide multiple traction interfaces, thereby increasing the flexibility and adaptability of the appliance. This design enables the appliance to flexibly adjust the direction and magnitude of the traction force according to different tooth A movement requirements, thereby enhancing the adaptability and flexibility of the appliance and better meeting the needs of clinical correction. In addition, the design of the branches 23 can also reduce the reliance on a single traction interface and reduce the risk of accessories falling off or being damaged due to concentrated traction.

[0113] Specifically, the branches 23 on the rod-shaped portion 22 can be implemented in different design forms. For example, the branches 23 can be straight, curved or other geometric shapes to meet different traction requirements. The number and position of the branches 23 can be adjusted according to the specific correction requirements to ensure the uniform distribution and effective transmission of the traction force. Accordingly, in this embodiment, each branch 23 is provided with a head 21 to serve as a traction interface of the elastic component. Moreover, the specific shape of the head 21 on each branch 23 can be designed according to the correction requirements corresponding to each branch 23.

[0114] It is worth mentioning that in the patent document with application number 202310941554.0, an adjustable traction hook for orthodontics and a supporting correction method thereof are disclosed, which specifically discloses an accessory body and a traction component, wherein the traction component includes a traction hook, a traction rod and a plurality of traction points arranged on the traction rod. It can be found from the patent document that the traction points in the traction component (equivalent to the head 21) are all arranged on the traction rod (equivalent to the rod-shaped portion 22), and extend along the length extension direction of the traction rod; it can be seen that the traction torque can be changed by changing the position of the traction point connected to the elastic component. Since the traction points are all arranged on the traction rod, due to the length limitation of the traction rod, changing the position of the traction point can change the direction of the traction torque, but the changeable range is not large, which has great limitations and cannot meet actual needs. In this embodiment, if Figure 3 As shown, the branch 23 is arranged on the rod-shaped portion 22 and forms a certain angle with the rod-shaped portion 22. Compared with the prior art, the required traction torque and torque direction can be obtained by setting the length of the branch 23 and the angle between the branch 23 and the rod-shaped portion 22 according to actual needs, so as to adapt to different traction requirements and ensure uniform distribution and effective transmission of traction force.

[0115] Implementation Method 3

[0116] This embodiment is a further improvement based on the first or second embodiment. The improvement lies in further defining the specific shape of the attachment body 1.

[0117] Specifically, the surface of the attachment body 1 that contacts the tooth surface has a microporous structure, and the pore diameter of the microporous structure ranges from 10 micrometers to 200 micrometers.

[0118] Through the design of the microporous structure, the bonding strength between the attachment body 1 and the tooth surface can be effectively improved. Specifically, the existence of the microporous structure increases the contact area, enabling the adhesive to better penetrate into the micropores, increasing the contact area between the adhesive and the attachment body, enhancing the micro-mechanical interlocking, and thus improving the bonding strength. In addition, the microporous structure can also relieve the stress generated during the curing process of the adhesive to a certain extent, reducing the bonding failure problem caused by stress concentration. Compared with the prior art, in this embodiment, through the setting of the microporous structure, not only the bonding strength of the attachment is improved, but also the bonding process is simplified, the operation difficulty is reduced, and the problem of attachment detachment caused by poor bonding is reduced.

[0119] It is worth mentioning that in the attachment of this embodiment, since both the attachment body 1 and the traction member 2 are integrally formed by 3D printing, therefore, when printing and manufacturing, the microporous structure can be directly formed on the attachment body. The microporous structure fabricated in this way can adopt structures that cannot be fabricated by some traditional subtractive manufacturing methods. Therefore, more radical and innovative structural designs can be adopted to meet the actual needs. For example, the microporous structure can be set to have a microporous structure with a barbed shape, so that the adhesive can penetrate into the microporous structure and form a barbed shape, thereby further enhancing the bonding effect.

[0120] Correspondingly, in the step of generating the model of the attachment body 1 on the surface of the dental three-dimensional model according to the orthodontic parameters of tooth A in the dental three-dimensional model,

[0121] Generate a microporous structure on the surface of the attachment body 1 that contacts the tooth surface of tooth A, and the pore diameter of the microporous structure ranges from 10 micrometers to 200 micrometers.

[0122] In the above embodiment, an elastic member is connected to the traction member 2, and the required traction force is applied through the traction member 2 to make tooth A move along a preset trajectory.

[0123] In some other embodiments, the shape of the attachment body can be designed so that the attachment body serves as a force-bearing part and cooperates with the appliance to apply force to the tooth A to push the tooth A to move along a set trajectory. Specifically, in this embodiment, by adding the on-demand design of the base shape, various shape structures can be flexibly designed (not just rectangular, but also crescent-shaped or other multi-plane optimized attachment designs with better control of axial tilt and torque) to achieve better mechanical interaction between the braces and the base body.

[0124] For example, Figure 4 As shown, the accessory body 1 has a crescent shape.

[0125] Specifically, the crescent-shaped accessory body 1 has at least one functional surface (working surface) for contacting the inner wall of the invisible braces, and as a "fulcrum" to convert the elastic deformation of the braces into precise thrust or pull on the tooth A; moreover, the inclination angle and height of the functional surface can guide the tooth A to move in a specific direction (such as rotation, depression or elongation). In addition, the crescent-shaped accessory body 1 has at least one transition surface, which has a smooth arc edge for dispersing the correction force to prevent excessive local pressure from causing deformation of the braces or damage to the tooth A; moreover, the smooth arc edge can prevent sharp edges from rubbing against the gums or buccal mucosa.

[0126] It is worth mentioning that, in the attachment of this embodiment, since both the attachment body 1 and the traction component 2 can be used as "fulcrums" to bear the force (such as the correction force of the orthodontic appliance and the elastic force of the elastic component), the two can cooperate with each other to apply force to the tooth A to push the tooth A to move along the set trajectory. Compared with the single "fulcrum" solution, this double "fulcrum" technical solution can better control the trajectory of tooth A's movement.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention rather than to limit them. Although the embodiments of the present invention have been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the present invention can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An attachment for an invisible orthodontic appliance, which can be set on teeth, characterized in that, Comprising: An attachment body that can be set on the tooth surface of the tooth; A traction component connected to the attachment body; The traction component is integrally manufactured with the attachment body.

2. The attachment of the invisible orthodontic appliance according to claim 1, wherein Further comprising: The traction component includes: A head for externally connecting an elastic component to apply a traction force to the attachment; A rod-shaped portion, with both ends of the rod-shaped portion respectively connected to the attachment body and the head.

3. The attachment of the invisible orthodontic appliance according to claim 2, characterized in that, A plurality of branches are further provided on the rod-shaped portion, and the branches are used to provide additional traction interfaces.

4. The attachment of the invisible orthodontic appliance according to claim 2, characterized in that, The head is arranged on a locus line, and the locus line is perpendicular to the connection line defined by taking the connection part of the rod-shaped portion and the attachment body as one endpoint and the impedance center of the tooth as the other endpoint.

5. The attachment of the invisible orthodontic appliance according to claim 2, characterized in that, The shape of the rod-shaped portion is consistent with the outer contour of the gingiva of the tooth, and the distance between the rod-shaped portion and the gingiva is kept within the range of 2 mm to 5 mm.

6. The attachment of the invisible orthodontic appliance according to claim 1, wherein The surface of the attachment body in contact with the tooth surface has a microporous structure, and the pore diameter of the microporous structure is within the range of 10 microns to 200 microns.

7. The attachment of the invisible orthodontic appliance according to claim 1, characterized in that, The attachment body has a crescent shape.

8. A manufacturing method of an attachment for an invisible orthodontic appliance, characterized in that, Including the following steps: According to the force application requirements of the invisible aligner on the teeth, determine the installation position and shape of the attachment body; Fit the oral CT data and the oral scan data to calculate the actual impedance center of the tooth; Design the force line for applying force according to the location of the tooth impedance center and the movement mode of the orthodontic tooth, and determine the location and shape of the head of the traction component; According to the determined installation position of the attachment body and the location of the head of the traction component, determine the shape of the rod-shaped portion of the traction component; Generate a three-dimensional model of the attachment according to the determined shapes of the attachment body and the traction component; Manufacture the attachment by 3D printing.

9. A computer program product, characterized in that, When the computer program in the computer program product is executed, it can implement the following steps: Obtain the oral scan data and the oral CT data to generate a three-dimensional tooth model; Fit the CT data and the oral scan to calculate the impedance center of the tooth in the three-dimensional tooth model; Generate a model of the attachment body on the surface of the three-dimensional tooth model according to the orthodontic parameters of the tooth in the three-dimensional tooth model for confirming the installation position and shape of the attachment body; Determine the location and shape of the head of the traction component according to the location of the tooth impedance center and the orthodontic parameters; According to the determined installation position of the attachment body and the location of the head of the traction component, determine the shape of the rod-shaped portion of the traction component; Further generate a three-dimensional model of the traction component on the model of the attachment body; Send the three-dimensional model of the attachment to a 3D printing device for manufacturing.

10. The computer program product according to claim 9, characterized in that, The three-dimensional model of the attachment is generated by artificial intelligence; the position of the impedance center of the tooth in the digital model is automatically calculated by artificial intelligence; The artificial intelligence has an attachment generation model, and the attachment generation model is obtained by learning the data training set for attachment generation.

11. The computer program product according to claim 10, wherein Before the step of sending the three-dimensional model of the attachment to the 3D printing device, it further includes: In response to the adjustment of the installation position and shape of the attachment body and / or the traction component, Regenerate the three-dimensional model of the attachment; When an adjustment occurs, add the three-dimensional model of the adjusted attachment to the data training set to improve the accuracy of the three-dimensional model generation of the attachment generation model.

12. The computer program product according to claim 9, characterized in that, After the step of further generating a three-dimensional model of the traction component on the model of the attachment body, it further includes: In response to a dragging action on the head of the traction component, display the movement of the head being dragged along a trajectory line; The trajectory line is perpendicular to the connection line defined with the connection part of the rod-shaped part and the attachment body as one end point and the impedance center of the tooth as the other end point.

13. The computer program product according to claim 9, wherein In the step of further generating a three-dimensional model of the traction component on the model of the attachment body according to the position of the impedance center of the tooth in the three-dimensional tooth model and the orthodontic parameters, the distance between the generated three-dimensional model of the traction component and the gingival outer contour of the three-dimensional tooth model is maintained within the range of 2 mm to 5 mm.

14. The computer program product according to claim 9, characterized in that, In the step of generating a model of the attachment body on the surface of the three-dimensional tooth model according to the orthodontic parameters of the tooth in the three-dimensional tooth model, Generate a microporous structure on the surface of the attachment body that contacts the tooth surface of the tooth, and the pore diameter of the microporous structure is within the range of 10 microns to 200 microns.

Images