3D printing orthodontic bracket model and 3D printing manufacturing method thereof

Abstract

The invention relates to the technical field of dental correction, in particular to a 3D printing orthodontic bracket model and a 3D printing manufacturing method thereof. The 3D printing orthodontic bracket model comprises a bracket and a guide plate which are integrally formed through 3D printing, an occlusal surface is arranged on the top surface of the guide plate, and a handle is arranged on the bottom surface of the guide plate; one side, deviating from teeth, of the bracket is a connecting and fixing surface, and the top of the connecting and fixing surface is integrally connected with the side part of the guide plate through a connecting rod. According to the 3D printing orthodontic bracket model manufacturing method, a bracket and a guide plate which are integrally formed through 3D printing are obtained according to oral tooth data, the shape, the size and the edge structure of the bracket are formed through digital design and construction according to the oral tooth data of a patient, and the face, away from the occlusal face, of the guide plate serves as a datum plane for positioning; and determining that the bracket is attached to the teeth. The problems that a bracket is not high in fitting degree, adaptation degree and adhesion degree, poor in correction effect, low in working efficiency, long in-mouth operation time and not high in patient comfort degree are solved.

Description

Technical Field

[0001] The present application relates to the field of dental orthodontic technology, and in particular to a 3D printed orthodontic bracket model and a 3D printing manufacturing method thereof. Background Art

[0002] At present, in traditional orthodontic treatment, orthodontic brackets are generally made of metal, ceramic or composite materials, and generally adopt uniform specifications. They are often not very adaptable and difficult to fully adapt to the tooth shape of each patient. In addition, the finished brackets are prone to not fitting well, the correction effect is poor, and they may even be poorly bonded and fall off when worn.

[0003] In the prior art, the finished brackets are generally bonded in two ways. The first bonding method is that the doctor manually adjusts the positioning bonding according to the specific situation of the patient. However, this method requires a high level of technical skills from the doctor and is not accurate enough. The chairside operation time is long, the work efficiency is low, and the operation in the patient's mouth for a long time leads to poor patient comfort. The second bonding method is to use a bracket guide plate for positioning bonding first, and then fix and bond the bracket according to the position after the guide plate is positioned. This method not only makes it easy for the adhesive to overflow, but also makes it easy to bond with the guide plate and be unable to be removed, and also requires a secondary positioning and bonding operation, which has low work efficiency and is not very convenient to operate. Summary of the invention

[0004] The purpose of the present application is to provide a 3D printed orthodontic bracket model and a 3D printing manufacturing method thereof, so as to solve the technical problems of low fit, adaptability and adhesion of existing brackets, poor correction effect, low work efficiency during operation, long intraoral operation time and low patient comfort.

[0005] In a first aspect, the present application provides a 3D printed orthodontic bracket model, comprising:

[0006] The bracket and guide plate are integrally formed by 3D printing, the top surface of the guide plate is provided with an occlusal surface corresponding to the occlusal position of the teeth, and the bottom surface of the guide plate is provided with a handle;

[0007] The side of the bracket that fits the teeth is a fitting surface, and the side of the bracket that faces away from the teeth is a connecting and fixing surface. The top of the connecting and fixing surface is integrally connected with the side of the guide plate through a connecting rod.

[0008] Furthermore, a breaking point is provided at the root where the connecting rod is connected to the connecting and fixing surface of the bracket.

[0009] Furthermore, a top bracket wing is provided on the upper portion of the connecting and fixing surface, and one end of the connecting rod is integrally connected to the top surface of the top bracket wing;

[0010] A bottom bracket wing is provided at the lower part of the connecting and fixing surface, and an archwire slot is provided between the top bracket wing and the bottom bracket wing and is arranged to penetrate transversely and be used for transverse fixation of the archwire.

[0011] Furthermore, two symmetrically arranged top bracket wings are sequentially arranged along the top of the connecting and fixing surface, and the top surfaces of the two top bracket wings are integrally connected to the side of the guide plate through a first connecting rod and a second connecting rod respectively, and the two top bracket wings are smoothly transitioned through a first concave arc surface; and / or

[0012] Two symmetrically arranged bottom bracket wings are sequentially arranged along the bottom of the connecting and fixing surface, and a second concave arc surface smoothly transitions between the two bottom bracket wings.

[0013] Furthermore, the first inner concave arc surface and the second inner concave arc surface are arranged to communicate with each other in the upper and lower directions and are located on the force center line to form a longitudinal fixing position for longitudinal fixing; and / or

[0014] The lower part of the back side of the top bracket wing is connected and fixed to the connecting and fixing surface, and a concave transition upper groove is formed between the upper part of the back side of the top bracket wing and the upper top of the connecting and fixing surface; and / or

[0015] The upper part of the back side of the bottom bracket wing is connected and fixed to the connecting and fixing surface, and an upper concave transition lower groove is formed between the lower part of the back side of the bottom bracket wing and the lower bottom of the connecting and fixing surface.

[0016] Furthermore, the first connecting rod and the second connecting rod are bent connecting rods with a bent portion, and also include a first straight rod and a second straight rod, one end of the first straight rod is connected to the rod body of the first connecting rod, and the other end is connected to the top of the connecting and fixing surface, and the first straight rod and the first connecting rod are located on the same plane, one end of the second straight rod is connected to the rod body of the second connecting rod, and the other end is connected to the top of the connecting and fixing surface, and the second straight rod and the second connecting rod are located on the same plane.

[0017] Furthermore, the fitting surface of the side of the bracket fitting the tooth is configured as a concave-convex surface, and the concave-convex surface has a plurality of convex portions and a plurality of concave portions arranged in an alternating manner;

[0018] The depths of the convex parts and the concave parts are 0.25-0.4 mm, and the distance between two adjacent convex parts and the distance between two adjacent concave parts are between 0.2-0.8 mm.

[0019] Furthermore, the outer peripheral edge of the fitting surface is provided with a circumferential edge protrusion, surrounding the concave-convex surface arrangement;

[0020] One side of the circumferential edge protrusion has a notch, and the notch is an overflow outlet.

[0021] In a second aspect, the present application provides a method for manufacturing a 3D printed orthodontic bracket model, which is used to manufacture the 3D printed orthodontic bracket model described in any of the above items, comprising:

[0022] First, obtain oral dental data through digital mouth scanning or silicone rubber impression;

[0023] Then, a bracket and a guide plate integrally formed by 3D printing are obtained according to the oral tooth data, the shape, size and edge structure of the bracket are digitally designed and constructed according to the patient's oral tooth data information, and the guide plate is positioned with the side away from its occlusal surface as the reference surface, the occlusal surface of the guide plate is arranged to correspond to the occlusal position of the teeth, and the bracket is determined to fit the teeth by constructing the positional relationship between the bracket and the guide plate.

[0024] Furthermore, the top of the connection and fixing surface of the bracket facing away from the teeth is integrally connected to the side of the guide plate through a connecting rod by 3D printing;

[0025] The handle side of the guide plate is placed toward the printing platform, and is tilted 20 to 45 degrees according to the common positioning direction of the brackets. Each printing layer is in a connected state, and the reference surface of the guide plate is set as a plane to evenly bear the force on the support point.

[0026] Compared with the prior art, the 3D printed orthodontic bracket model and the 3D printing manufacturing method thereof provided in the present application, the 3D printed orthodontic bracket model comprises a bracket and a guide plate integrally formed by 3D printing, and the top surface of the guide plate is an occlusal surface, corresponding to the occlusal surface position of the teeth, and the bottom surface of the guide plate is provided with a push handle for the doctor to hold it in the patient's mouth for positioning and fixing operations; the side of the bracket that is in contact with the teeth is a fitting surface, which is used to fit the teeth, and the side of the bracket away from the teeth is a connecting and fixing surface, and the top of the connecting and fixing surface is integrally connected to the side of the guide plate by a connecting rod. And the method for manufacturing the 3D printed orthodontic bracket model is: first, oral tooth data is obtained by digital mouth scanning or silicone rubber molding, and then a bracket and a guide plate integrally formed by 3D printing are obtained according to the oral tooth data, and the shape, size and edge structure of the bracket are digitally designed and constructed according to the patient's oral tooth data information, and the guide plate is positioned with the side away from its occlusal surface as the reference plane, the occlusal surface of the guide plate is set to correspond to the occlusal position of the tooth, and the bracket is set to fit the tooth by constructing the positional relationship between the bracket and the guide plate.

[0027] With this arrangement, first, a personalized orthodontic bracket model is designed according to the different tooth forms of different people. The bracket is accurately digitally designed and modeled through precise oral tooth data. The shape, size and edge structure of the bracket completely match the patient's settings, greatly improving the matching degree and the fit with the teeth, ensuring that each bracket can be accurately fitted on the tooth surface; second, the bracket and the guide plate are formed in one piece, and the positioning and precise fitting of the bracket can be completed through a one-time positioning operation of the guide plate. There is no need for secondary positioning and bonding steps of the bracket, which greatly improves the bonding accuracy of the bracket, reduces the error caused by bracket reassembly, and greatly shortens the correction time, improves work efficiency, and the operation time in the patient's mouth is short, without excessive contact with the oral cavity. Internal tissue, reducing stimulation to oral soft tissue, improving patient comfort, and the bottom surface of the guide plate is directly the positioning reference surface, which can be accurately fitted and positioned directly according to the occlusal surface of the teeth, accurately positioned on each tooth, improving positioning accuracy, improving tooth fit, and improving matching; thirdly, because the bracket and guide plate have been designed and positioned with each other on the software, the doctor only needs to perform simple bonding in the mouth, which can greatly save chairside operation time, greatly save intraoral operation time, and improve patient comfort; fourthly, the bracket and guide plate are integrally formed through a connecting rod. During the printing process, there is no need to add a support rod to the bracket. The entire bracket and guide plate are integrated and printed without isolated islands, ensuring the accuracy of printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of an orthodontic bracket model provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of a partial structure of an orthodontic bracket model provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of the bracket provided in the embodiment of the present application;

[0032] Figure 4 A schematic diagram of the structure of the connection and fixing surface of the bracket provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of the structure of a bracket at another angle provided in an embodiment of the present application;

[0034] Figure 6A schematic structural diagram of the fitting surface of the bracket provided in an embodiment of the present application;

[0035] Figure 7 A side view of the bracket provided in the embodiment of the present application Figure 1 ;

[0036] Figure 8 A side view of the bracket provided in the embodiment of the present application Figure 2 ;

[0037] Fig. 9 A bottom view of an orthodontic bracket model provided in an embodiment of the present application;

[0038] Fig.10 A top view of an orthodontic bracket model provided in an embodiment of the present application;

[0039] Fig.11 A schematic diagram of the structure of the 3D printed orthodontic bracket model provided in the embodiment of the present application Figure 1 ;

[0040] Fig.12 A schematic diagram of the structure of the 3D printed orthodontic bracket model provided in the embodiment of the present application Figure 2 ;

[0041] Fig.13 A diagram showing the orthodontic bracket model provided in an embodiment of the present application in use in the oral cavity.

[0042] Reference numerals:

[0043] 100-3D printed orthodontic bracket model;

[0044] 10-Bracket;

[0045] 11-Connection fixing surface;

[0046] 111-top bracket wing;

[0047] 112 - bottom bracket wing;

[0048] 113-archwire slot;

[0049] 1141- first concave arc surface;

[0050] 1142- second concave arc surface;

[0051] 1151-concave transition upper groove;

[0052] 1152-upper concave transition lower groove;

[0053] 12-fitting surface;

[0054] 121-concave and convex surface;

[0055] 1211-convex part;

[0056] 1212-concave;

[0057] 122- circumferential edge protrusion;

[0058] 123-overflow;

[0059] 20-guide plate;

[0060] 21- first top surface;

[0061] 211-occlusal surface;

[0062] 22- a first bottom surface;

[0063] 221-handle;

[0064] 23- first side portion;

[0065] 30-connecting rod;

[0066] 31- breaking point;

[0067] 321-first connecting rod;

[0068] 322- second connecting rod;

[0069] 331-First straight bar;

[0070] 332-Second straight shot;

[0071] 41- support column;

[0072] 42-supporting bottom plate;

[0073] 200-teeth. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0075] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0076] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0077] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0078] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0079] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0080] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0081] like Figures 1 to 13As shown, the embodiment of the present application provides a 3D printed orthodontic bracket model 100, and a 3D printed orthodontic bracket model manufacturing method for manufacturing the 3D printed orthodontic bracket model 100. The 3D printed orthodontic bracket model 100 includes: a bracket 10 and a guide plate 20 integrally formed by 3D printing, the first top surface 21 of the guide plate 20 is provided with an occlusal surface 211 that fits the occlusal position of the tooth 200, and the first bottom surface 22 of the guide plate 20 is provided with a handle 221 for convenient positioning and fixing operations by the doctor holding it in the patient's mouth; the side of the bracket 10 that fits the tooth 200 is a fitting surface 12, and the side of the bracket 10 that faces away from the tooth 200 is a connecting and fixing surface 11, and the top of the connecting and fixing surface 11 is integrally connected with the first side portion 23 of the guide plate 20 through a connecting rod 30.

[0082] The manufacturing method of the 3D printed orthodontic bracket model 100 comprises: firstly obtaining oral tooth data by digital mouth scanning or silicone rubber molding, and then obtaining the bracket 10 and the guide plate 20 formed in one piece by 3D printing according to the oral tooth data. Specifically, the teeth can be arranged by digital orthodontic software according to the collected oral tooth data, and a neat tooth shape can be arranged, and then the positioning scheme of the bracket 10 and the guide plate 20 is designed in the model to obtain a three-dimensional model of the integrally formed bracket 10 and the guide plate 20, and then printed out by a 3D printing device. Specifically, the shape, size and edge structure of the bracket 10 are formed by digital design and construction according to the oral tooth data information of the patient, and preferably the guide plate 20 is positioned with the side away from its occlusal surface 211 as the reference surface, and the occlusal surface 211 of the guide plate 20 corresponds to the occlusal position of the tooth 200, and the bracket 10 is set to fit the tooth 200 by constructing the positional relationship between the bracket 10 and the guide plate 20.

[0083] Compared with the prior art, the 3D printed orthodontic bracket model 100 and the 3D printing manufacturing method thereof provided in the embodiment of the present application, first, can design a personalized orthodontic bracket model according to the different forms of teeth 200 of different people. The bracket 10 is accurately digitally designed and modeled through accurate oral tooth data. The shape, size and edge structure of the bracket 10 completely match the patient's settings, greatly improving the matching degree and the fit with the tooth 200, ensuring that each bracket 10 can be accurately fitted on the surface of the tooth 200; second, the bracket 10 and the guide plate 20 are integrally formed, and the positioning and precise fitting of the bracket 10 can be completed by a one-time positioning operation of the guide plate 20, without the need for secondary positioning and bonding steps of the bracket 10, greatly improving the bonding accuracy of the bracket 10, reducing the error caused by the reassembly of the bracket 10, and greatly shortening the correction time, improving work efficiency, and in The patient's intraoral operation time is short, and there is no need to contact the intraoral tissue too much, which reduces the stimulation to the oral soft tissue and improves the patient's comfort. In addition, the bottom surface of the guide plate 20 is directly the positioning reference surface, which can be directly accurately fitted and positioned according to the occlusal surface 211 of the tooth 200, and accurately positioned on each tooth 200, thereby improving the positioning accuracy, improving the fit of the tooth 200, and improving the matching degree. Thirdly, since the bracket 10 and the guide plate 20 have been designed and positioned with each other in the software, the doctor only needs to perform simple bonding in the mouth, which can greatly save the chairside operation time, and also greatly save the intraoral operation time, thereby improving the patient's comfort. Fourthly, the bracket 10 and the guide plate 20 are integrally formed through the connecting rod 30. During the printing process, the bracket 10 does not need to add a support rod. The entire bracket 10 and the guide plate 20 are integrated and printed without the appearance of isolated islands, thereby ensuring the accuracy of printing.

[0084] Regarding the manufacturing method of the aforementioned 3D printed orthodontic bracket model, preferably, the top of the connecting and fixing surface 11 of the bracket 10 facing away from the tooth 200 and the first side portion 23 of the guide plate 20 are integrally connected by a connecting rod 30 for 3D printing, and the handle 221 side of the guide plate 20 is placed toward the printing platform, and is placed at an angle of 20 to 45 degrees according to the common positioning direction of the bracket 10, such as Fig.11 As shown, each printing layer is in a connected state, no isolated islands appear, the printing accuracy is guaranteed, and the overall tilted setting is conducive to sharing the printing accuracy of each layer and improving the printing accuracy effect of the overall structure.

[0085] A specific method for manufacturing a 3D printed orthodontic bracket model includes the following steps:

[0086] Step 1, using the bottom surface of the guide plate 20 as a reference surface, the guide plate 20 is tilted according to the common positioning direction of the bracket 10, and the bracket 10 is placed at 20 to 45 degrees;

[0087] Step 2, adding support columns 41 to the bottom surface of the guide plate 20 and the various force points on the handle 221;

[0088] Step 3, during the printing process, as the guide plate 20 is connected, islands are avoided during printing. During the printing process, each layer is connected and printed downward through the connecting rod 30. The three-dimensional data of the guide plate 20 that has been typeset is placed in the 3D printing device, and printed using nano-ceramic resin and high-strength and high-toughness transparent resin;

[0089] Step 4: After printing, use alcohol with a concentration of ≥ 95% to clean the model. After cleaning, blow dry the alcohol on the surface of the 3D printed orthodontic bracket model.

[0090] Step 5: Use UV light for secondary curing to complete.

[0091] like Figure 1 and Figure 2 As shown, the reference surface of the aforementioned guide plate 20 (the first bottom surface 22 shown in the figure) is preferably set as a plane, so that after the subsequent manufacturing is completed, by adding uniform support columns 41 to support the placement at the reference surface, the reference surface is set as a plane, which can ensure that the force on the support point connection surface is uniform. Specifically, the bottom end of the support column 41 is fixedly connected to the support bottom plate 42, and the length of the support column is preferably between 0.5 and 1 mm. It is preferred to add the support column 41 to each force point position of the first bottom surface 22 of the guide plate 20 and the handle 221 to improve the overall support force.

[0092] Regarding the 3D printed orthodontic bracket model 100 provided in the embodiment of the present application, a preferred embodiment is as follows: Figure 2 and Fig.11 As shown, the root of the connecting rod 30 connected to the connecting and fixing surface 11 of the bracket 10 may be provided with a breaking point 31. After the bracket 10 is bonded, it can be directly and simply operated through the breaking point 31 to break, so that the bracket 10 and the guide plate 20 can be separated, which solves the problem that the guide plate 20 is difficult to separate from the bracket 10 after the operation is completed, and improves the simplicity and convenience of the doctor's operation.

[0093] Regarding the connection and fixing surface 11 of the bracket 10 provided in the embodiment of the present application, a specific embodiment is as follows: Figure 1 and Figure 2 As shown, a top bracket wing 111 may be provided on the upper portion of the connecting and fixing surface 11 of the aforementioned bracket 10, and one end of the aforementioned connecting rod 30 (specifically, the end provided with the aforementioned breaking point 31) may be integrally connected to the top surface of the top bracket wing 111; and preferably, two symmetrically arranged top bracket wings 111 may be sequentially provided along the top of the connecting and fixing surface 11, and the top surfaces of the two top bracket wings 111 may be integrally connected to the first side portion 23 of the guide plate 20 through two connecting rods 30 (respectively a first connecting rod 321 and a second connecting rod 322), so as to improve the uniform force of the connection, and improve the connection firmness and stability.

[0094] like Figure 4 As shown, preferably, the two top bracket wings 111 are smoothly transitioned through the first concave arc surface 1141; preferably, the lower part of the connection and fixing surface 11 of the bracket 10 may be provided with a bottom bracket wing 112, and further, two symmetrically arranged bottom bracket wings 112 may be sequentially arranged along the bottom of the connection and fixing surface 11, and the two bottom bracket wings 10 are smoothly transitioned through the second concave arc surface 1142. Further, the first concave arc surface 1141 and the second concave arc surface 1142 are arranged to be relatively connected to each other up and down, and are located on the force center line, forming a longitudinal fixing position for longitudinal fixation, which is used for longitudinal fixation of auxiliary equipment such as arch wires. Optionally, the first concave arc surface 1141 and the second concave arc surface 1142 are both conical smooth surfaces with a larger upper part and a smaller lower part, so as to reduce the printing stress of the ends of the top bracket wing 111 and the bottom bracket wing 112, which is beneficial to the end molding accuracy of the top bracket wing 111 and the bottom bracket wing 112.

[0095] like Figures 2 to 4 As shown, further, an archwire slot 113 is provided between the top bracket wing 111 and the bottom bracket wing 112, which is used for horizontal fixation of the archwire. The archwire slot 113 is located on the horizontal center line of the connection and fixing surface 11 of the bracket 10, and is arranged parallel to the top of the bracket 10. The slot width is 0.5-0.9 mm, and the slot depth is 0.9-1.5 mm. The two ends of the archwire slot 113 are inclined toward the top bracket wing 111 and the bottom bracket wing 112 to prevent the archwire from slipping out.

[0096] An optional embodiment is that the overall shape of the top bracket wing 111 and the bottom bracket wing 112 is a smooth arc, and the end corners are set as arc-shaped chamfers, which is conducive to fixing the arch wire and preventing it from falling off. The curved surface is conducive to 3D printing and also avoids irritation to the oral soft tissue.

[0097] Another optional embodiment is, Figure 3 , Figure 7 and Figure 8 As shown, the lower part of the back of the aforementioned top bracket wing 111 is connected and fixed to the connection and fixing surface 11 of the bracket 10, and a concave transition upper groove 1151 is formed between the upper part of the back of the top bracket wing 111 and the upper top of the connection and fixing surface 11; similarly, the upper part of the back of the aforementioned bottom bracket wing 112 is connected and fixed to the connection and fixing surface 11 of the bracket 10, and a concave transition lower groove 1152 is formed between the lower part of the back of the bottom bracket wing 112 and the lower bottom of the connection and fixing surface 11. Therefore, greater stress is distributed to the main body of the bracket 10, so that each printed layer transitions to the groove, forming a continuous bonding of the upper and lower layers.

[0098] Another optional embodiment is, Figure 2As shown, the first connecting rod 321 and the second connecting rod 322 are bent connecting rods with bent portions, and also include a first straight rod 331 and a second straight rod 332 that support and share the first connecting rod 321 and the second connecting rod 322. One end of the first straight rod 331 is connected to the rod body of the first connecting rod 321, and the other end is connected to the top of the connection and fixing surface 11, and the first straight rod 331 and the first connecting rod 321 are located on the same plane, and one end of the second straight rod 332 is connected to the rod body of the second connecting rod 322, and the other end is connected to the top of the connection and fixing surface 11, and the second straight rod 332 and the second connecting rod 322 are located on the same plane. Make the force during the printing process balanced and dispersed, and reduce the peeling and pulling force during the printing process.

[0099] Regarding the fitting surface 12 of the bracket 10 provided in the embodiment of the present application, a preferred embodiment is as follows: Figure 5 and Figure 6 As shown, the fitting surface 12 of the bracket 10 that fits the tooth 200 can be specifically set as a concave-convex surface 121, and the concave-convex surface 121 has a plurality of convex parts 1211 and a plurality of concave parts 1212 arranged in a staggered manner. The shapes of the convex parts 1211 and the concave parts 1212 are not limited, and can be circular, elliptical, long strip, triangular, etc. Preferably, the depth of the convex parts 1211 and the concave parts 1212 is 0.25-0.4 mm, and the spacing between two adjacent convex parts 1211 and the spacing between two adjacent concave parts 1212 are between 0.2-0.8 mm. This ensures that the convex parts 1211 and the tooth 200 are evenly stressed, and under the action of the concave-convex surface 121, the bonding force with the tooth 200 can be enhanced.

[0100] In a more preferred embodiment, the outer peripheral edge of the fitting surface 12 of the bracket 10 may be provided with a peripheral edge protrusion 122, which surrounds the concave-convex surface 121 and can improve the bonding and adsorption force with the tooth surface.

[0101] Furthermore, one side of the aforementioned circumferential edge protrusion 122 has a notch, which is an overflow port 123. The overflow port 123 is preferably arranged in the middle position of the side of the bonding surface 12, which is conducive to the discharge of excess adhesive and avoids the formation of cavities due to internal residual air. Preferably, the width of the overflow port 123 is half of the size of the side of the bonding surface 12. For example, if the length of the side is 3.0 mm, the width of the overflow port 123 is 1.5 mm.

[0102] An optional embodiment is that the thickness of the first side portion 23 of the guide plate 20 provided in the embodiment of the present application, which is connected to the connecting rod 30 and wrapped around the tooth, is 0.2 to 1.0 mm to avoid interference with the positioning position of the bracket 10.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A 3D printed orthodontic bracket model, characterized in that: include: The bracket and guide plate are integrally formed by 3D printing, the top surface of the guide plate is provided with an occlusal surface corresponding to the occlusal position of the teeth, and the bottom surface of the guide plate is provided with a handle; The side of the bracket that fits the teeth is a fitting surface, and the side of the bracket that faces away from the teeth is a connecting and fixing surface. The top of the connecting and fixing surface is integrally connected with the side of the guide plate through a connecting rod.

2. The 3D printed orthodontic bracket model according to claim 1, characterized in that: A breaking point is provided at the root where the connecting rod is connected to the connecting and fixing surface of the bracket.

3. The 3D printed orthodontic bracket model according to claim 1 or 2, characterized in that: A top bracket wing is provided on the upper portion of the connection fixing surface, and one end of the connection rod is integrally connected to the top surface of the top bracket wing; A bottom bracket wing is provided at the lower part of the connecting and fixing surface, and an archwire slot is provided between the top bracket wing and the bottom bracket wing and is arranged to penetrate transversely and be used for transverse fixation of the archwire.

4. The 3D printed orthodontic bracket model according to claim 3, characterized in that: Two symmetrically arranged top bracket wings are sequentially arranged along the top of the connecting and fixing surface, and the top surfaces of the two top bracket wings are integrally connected to the side of the guide plate through a first connecting rod and a second connecting rod respectively, and a first concave arc surface smoothly transitions between the two top bracket wings; and / or Two symmetrically arranged bottom bracket wings are sequentially arranged along the bottom of the connecting and fixing surface, and a second concave arc surface smoothly transitions between the two bottom bracket wings.

5. The 3D printed orthodontic bracket model according to claim 4, characterized in that: The first inner concave arc surface and the second inner concave arc surface are disposed in a vertically relative manner and are located on the force center line to form a longitudinal fixing position for longitudinal fixing; and / or The lower part of the back side of the top bracket wing is connected and fixed to the connecting and fixing surface, and a concave transition upper groove is formed between the upper part of the back side of the top bracket wing and the upper top of the connecting and fixing surface; and / or The upper part of the back side of the bottom bracket wing is connected and fixed to the connecting and fixing surface, and an upper concave transition lower groove is formed between the lower part of the back side of the bottom bracket wing and the lower bottom of the connecting and fixing surface.

6. The 3D printed orthodontic bracket model according to claim 4 or 5, characterized in that: The first connecting rod and the second connecting rod are bent connecting rods with a bent portion, and also include a first straight rod and a second straight rod, one end of the first straight rod is connected to the rod body of the first connecting rod, and the other end is connected to the top of the connecting and fixing surface, and the first straight rod and the first connecting rod are located on the same plane, one end of the second straight rod is connected to the rod body of the second connecting rod, and the other end is connected to the top of the connecting and fixing surface, and the second straight rod and the second connecting rod are located on the same plane.

7. The 3D printed orthodontic bracket model according to claim 1, characterized in that: The fitting surface of the side of the bracket fitting the tooth is set as a concave-convex surface, and the concave-convex surface has a plurality of convex parts and a plurality of concave parts arranged in an alternating manner; The depths of the convex parts and the concave parts are 0.25-0.4 mm, and the distance between two adjacent convex parts and the distance between two adjacent concave parts are between 0.2-0.8 mm.

8. The 3D printed orthodontic bracket model according to claim 7, characterized in that: The outer peripheral edge of the fitting surface is provided with a circumferential edge protrusion, surrounding the concave-convex surface; One side of the circumferential edge protrusion has a notch, and the notch is an overflow outlet.

9. A method for manufacturing a 3D printed orthodontic bracket model, characterized in that: A 3D printed orthodontic bracket model for manufacturing any one of claims 1 to 8, comprising: First, obtain oral dental data through digital mouth scanning or silicone rubber impression; Then, a bracket and a guide plate integrally formed by 3D printing are obtained according to the oral tooth data, the shape, size and edge structure of the bracket are digitally designed and constructed according to the patient's oral tooth data information, and the guide plate is positioned with the side away from its occlusal surface as the reference surface, the occlusal surface of the guide plate is arranged to correspond to the occlusal position of the teeth, and the bracket is determined to fit the teeth by constructing the positional relationship between the bracket and the guide plate.

10. The method for manufacturing a 3D printed orthodontic bracket model according to claim 9, characterized in that: The top of the connection and fixing surface of the bracket facing away from the teeth is integrally connected with the side of the guide plate through a connecting rod by 3D printing; The handle side of the guide plate is placed toward the printing platform, and is tilted 20 to 45 degrees according to the common positioning direction of the brackets. Each printing layer is in a connected state, and the reference surface of the guide plate is set as a plane to evenly bear the force on the support point.

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