Sliding cover type orthodontic bracket based on 3D printing technology

Abstract

The utility model belongs to the technical field of orthodontic equipment, in particular to a slip cover type orthodontic bracket based on 3D printing technology, which comprises a bracket body and a cover plate, the bracket body comprises a bracket wing, a side slot wing and a base, the bracket wing and the side slot wing are respectively and fixedly connected with the base, the bracket wing is positioned above the side slot wing, and the cover plate is positioned above the side slot wing. The side groove wings are slidably connected with the cover plate in a sleeved mode, the upper end of the base is provided with a gap reserving area and assembling holes used for nickel-titanium alloy wires, the assembling holes are located in the bottom of the gap reserving area and comprise the first assembling hole and the second assembling hole, and the first assembling hole and the second assembling hole are the same in depth and shape. The cover piece comprises two cover lugs and a pushing slope, and a narrowing area, a first matching groove and a second matching groove are formed in the middle of each cover lug; the self-locking function of the cover plate and the bracket body is achieved through the cooperation of the nickel-titanium alloy wire and the narrowing area, and the problem that the bracket is not prone to falling off in the correction process is solved through the inlaid ring of the base.

Description

Technical Field

[0001] The utility model relates to the technical field of teeth correction equipment, in particular to a sliding cover type orthodontic bracket based on 3D printing technology. Background Art

[0002] Sliding cover self-ligating bracket is a common dental device used for orthodontic treatment. It is made of metal material and usually consists of two parts: bracket body and sliding cover. The bracket body is the part fixed on the teeth, and the sliding cover is the sliding part used to lock the archwire.

[0003] For example, the self-ligating bracket with publication number CN108742896A, its main structure includes a main body, a cover body part matched with the main body, and an elastic member, characterized in that the main body is provided with a cover body placement part and a first groove intersecting with the main groove, the first groove has openings respectively located at the bottom of the cover body placement part and the outer side of the main body; the elastic member includes a clamping part, and the elastic member is connected to the first groove; the cover body has a second groove matching the clamping part of the elastic member, and the bottom of the second groove is provided with a blocking part, and the cover body is installed on the cover body placement part, and the locking of the bracket cover is achieved by the cooperation between the groove and the elastic member. Another example is CN205054470U, a passive ceramic self-ligating bracket for teeth, whose archwire is fixed in the second groove by a self-locking clip, and both ends of the bracket body extend outward to form a connecting part, and the connecting part is concave to form a clamping groove, and the self-locking clip is clamped into the clamping groove, and the bracket is self-locked by means of the self-locking clip. Elastic parts of specific shapes need to be customized. Since the elastic parts of the bracket have high requirements on precision, their production is relatively complicated and costly. In addition, the elastic parts are relatively complicated, which will affect the overall product quality of the bracket. At the same time, the bracket base produced by the existing technology cannot fully express the smaller and detailed base pattern structure due to the processing accuracy, so the base pattern is mostly simple graphics or rough surface. Relatively speaking, simple graphics cannot produce an inlay effect with the cured adhesive, and the bonding performance is relatively low. Bracket falling occurs from time to time. In view of the above problems, a sliding cover orthodontic bracket based on 3D printing technology is proposed. Utility Model Content

[0004] In order to make up for the shortcomings of the prior art, the self-ligating bracket has a high cost, and due to the introduction of elastic parts of a specific shape, the quality has decreased and the traditional bracket base is easy to fall off. The utility model proposes a sliding cover orthodontic bracket based on 3D printing technology.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a sliding cover type orthodontic bracket based on 3D printing technology, comprising a bracket body and a cover plate, the bracket body comprising a bracket wing, a side groove wing and a base, the bracket wing and the side groove wing are respectively fixedly connected to the base, the bracket wing is located above the side groove wing, the side groove wing is slidably sleeved with the cover plate, the upper end of the base is provided with a gap area and an assembly hole for a nickel-titanium alloy wire, the assembly hole is located at the bottom of the gap area, the assembly hole comprises a first assembly hole and a second assembly hole, the first assembly hole and the second assembly hole have the same depth and shape;

[0006] The cover plate includes two cover ears and a push slope, a narrowing area, a first matching groove and a second matching groove are opened in the middle of the cover ear, the narrowing area is located between the first matching groove and the second matching groove, and the push slope is installed on the first matching groove and away from the side of the second matching groove.

[0007] Preferably, the advancement ramp is in contact with the substrate.

[0008] Preferably, a groove is provided on the upper side of the base, and the groove is located between the bracket wing and the base.

[0009] Preferably, there are two side groove wings, and the opposite surfaces of the two side groove wings are provided with guide grooves, and the two guide grooves are respectively slidably connected with the two cover ears.

[0010] Preferably, a stop surface is provided on one side of the bracket wing close to the side groove wing, and the stop surface is in contact with the cover ear.

[0011] Preferably, some of the bracket wings away from the side groove wings are provided with traction hooks.

[0012] Preferably, a plurality of inlay rings are provided on the bottom surface of the base, and the base matches the curvature of the patient's teeth.

[0013] Preferably, the shape of the narrowed area is an arc-shaped notch, which is used to prevent the nickel-titanium alloy wire from passing through the first matching groove.

[0014] Preferably, the first assembly hole and the second assembly hole are holes with a depth of 0.8 mm and a diameter of 0.32 mm.

[0015] Preferably, the depth of the gap area is less than 0.1 mm.

[0016] The utility model is beneficial in that:

[0017] 1. The utility model inserts two sections of nickel-titanium alloy wire into the first assembly hole and the second assembly hole respectively, and then pushes the cover ear of the cover piece upward along the guide groove, so that the alloy wire is stuck in the matching groove along the pushing slope, and the cover piece cannot slide off the bracket body at this time; when it is in the locked state, the upper part of the cover ear fits with the stop surface, the cover ear is inserted into the guide groove, and the alloy wire is in the second matching groove of the cover piece. Due to the existence of the narrowing area, the alloy wire cannot pass through the narrowing area under normal force, so the cover piece is in a stable locked state; when the cover piece is in the open state, the alloy wire is in the first matching groove of the cover piece, and the inner side of the pushing slope plays a role in preventing the cover piece from falling, avoiding the need to customize elastic parts of specific shapes, and only needs the alloy wire with mature technology and high yield rate available on the market to realize the self-locking function of the bracket;

[0018] 2. The utility model adopts the structural design of the base and the 3D printing technology, and the base design pattern can stably fix the adhesive to the bracket base, and after the adhesive is cured, it forms an inlay with the bracket base, which solves the problem that the bracket is not easy to fall off during the correction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the bracket body and cover plate structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the bracket structure of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the cover plate of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the substrate of the utility model.

[0024] In the figure: 1, bracket body; 2, cover plate; 3, bracket wing; 4, side groove wing; 5, base; 6, stop surface; 7, guide groove; 81, first assembly hole; 82, second assembly hole; 9, gap area; 10, cover ear; 11, push slope; 12, narrowing area; 13, first matching groove; 14, second matching groove; 15, groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The following is combined with the accompanying drawings Figures 1 to 4 To further explain this application in detail, the process of making a sliding cover orthodontic bracket by a 3D printer can be:

[0027] S1. In the process of using computer-aided design software to design the bracket, the curvature of the bracket base can be customized according to the patient's needs or by referring to the patient's tooth curvature and other data during the CAD design process. In addition, the design of the base can adopt an inlayable structure array, such as Figure 4 , reasonably distribute the inlay structure on the bracket base and export the stl model.

[0028] S2. Import the stl model data into the 3D printer after typesetting, and use 3D printing to manufacture ceramic sliding cover orthodontic brackets. During the 3D printing process, it will automatically fill the water-soluble support material in the gap. During the 3D printing process, the bracket needs to reserve a sintering shrinkage rate of 16% to 19%, and this reserved shrinkage process is automatically generated by the typesetting software.

[0029] S3. Cleaning the sliding orthodontic bracket: The STL model data generates a layout file and transmits it to the printer. The bracket embryo is formed on the printing tray through high-precision 3D printing. After printing is completed, wait for the printing tray to cool down to 60°C, take the tray containing the sliding orthodontic bracket embryo out of the 3D printer, and put it into a constant temperature water bath with a water temperature of 26-30°C to remove the support. After the bracket is detached from the tray, transfer the sliding orthodontic bracket to the cleaning basket and continue to immerse it in the constant temperature water bath. Use a conductivity meter to measure the conductivity in the constant temperature water tank until the conductivity in the water is less than 20-40μS and no longer changes, and the cleaning is completed.

[0030] S4. After cleaning, transfer the 3D printed one-piece self-locking bracket to an oven at 80-120°C for drying for 20-30 minutes.

[0031] S5. The dried bracket is transferred to a normal pressure sintering furnace for sintering. The sintering process is as follows: the zirconia bracket green body is heated from 0°C to 300°C at a heating rate of 3-6°C / min, and kept warm for 30 minutes; the temperature is heated from 300°C to 950°C at a heating rate of 3-6°C / min, and kept warm for 120 minutes; the temperature is heated from 950°C to 1400-1550°C at a heating rate of 1-4°C / min, and kept warm for 150 minutes, and then cooled to room temperature to obtain a sintered sliding cover orthodontic bracket.

[0032] S6. After the sintering of the sliding cover orthodontic bracket is completed, the bracket is taken out of the sintering furnace and its outer contour is sandblasted.

[0033] The present application embodiment discloses a sliding cover type orthodontic bracket based on 3D printing technology. Figure 1 , Figure 2 , Figure 3 and Figure 4 , a sliding cover type orthodontic bracket based on 3D printing technology, comprising a bracket body 1 and a cover plate 2, the bracket body 1 comprising a bracket wing 3, a side groove wing 4 and a base 5, the bracket wing 3 and the side groove wing 4 are respectively fixedly connected to the base 5, the bracket wing 3 is located above the side groove wing 4, the side groove wing 4 is slidably sleeved with the cover plate 2, the upper end of the base 5 is provided with a gap area 9 and an assembly hole for a nickel-titanium alloy wire, the assembly hole is located at the bottom of the gap area 9, the assembly hole comprises a first assembly hole 81 and a second assembly hole 82, the first assembly hole 81 and the second assembly hole 82 have the same depth and shape;

[0034] The cover sheet 2 includes two cover ears 10 and a push slope 11. A narrowing area 12, a first matching groove 13 and a second matching groove 14 are formed in the middle of the cover ear 10. The narrowing area 12 is located between the first matching groove 13 and the second matching groove 14. The push slope 11 is installed on the first matching groove 13 and away from the second matching groove 14.

[0035] The advancing slope 11 is in contact with the base 5 .

[0036] A groove 15 is provided on the upper side of the base 5 , and the groove 15 is located between the bracket wing 3 and the base 5 .

[0037] There are two side groove wings 4 , and the opposite surfaces of the two side groove wings 4 are each provided with a guide groove 7 , and the two guide grooves 7 are respectively slidably sleeved with the two cover ears 10 .

[0038] A stop surface 6 is provided on one side of the bracket wing 3 close to the side slot wing 4 , and the stop surface 6 is in contact with the cover ear 10 .

[0039] A traction hook is provided on one side of the bracket wing 3 away from the side slot wing 4 .

[0040] The bottom surface of the base 5 is provided with a plurality of inlay rings, and the base 5 matches the curvature of the patient's teeth;

[0041] The shape of the narrowed area 12 is an arc-shaped notch, which is used to prevent the nickel-titanium alloy wire from passing through the first matching groove 13.

[0042] The first assembly hole 81 and the second assembly hole 82 are holes with a depth of 0.8 mm and a diameter of 0.32 mm.

[0043] The depth of the gap area 9 is less than 0.1mm, the two sections of the nickel-titanium alloy wire are 1mm long and 0.3mm in diameter, and the gap between the guide groove 7 and the cover ear 10 satisfies the condition of being greater than 0.01mm and less than 0.03mm. Therefore, the depth of the gap area 9 is less than 0.1mm, so the nickel-titanium alloy wire can extend a distance between 0.07mm and 0.09mm. The existence of the gap area 9 ensures that the alloy wire has a certain degree of bending room when being pushed forward, so that the alloy wire can be inserted into the matching groove along the pushing slope 11, and the nickel-titanium alloy wire can be stuck between the narrowing area 12 and the second matching groove 14 without external force. The self-locking bracket after assembly can be controlled by using an opener to open and close the cover plate 2 while fixing the bracket body 1.

[0044] Working principle: Use tweezers to fix the bracket body 1, insert two sections of nickel-titanium alloy wire with a length of 1 mm and a diameter of 0.3 mm into the first assembly hole 81 and the second assembly hole 82 with a depth of the assembly hole respectively, push the cover ear 10 upward along the guide groove 7, so that the alloy wire moves along the pushing slope 11 until the alloy wire is stuck in the second matching groove 14 of the matching groove, and the assembly of the sliding cover type orthodontic bracket is completed.

[0045] When the cover ear 10 is inserted into the guide groove 7 and the cover ear 10 is in contact with the stop surface 6, it is considered that the locking position is reached. At this time, the gap between the guide groove 7 and the cover ear 10 meets the condition of being greater than 0.01mm and less than 0.03mm, and the alloy wire is in the second matching groove 14. In the absence of a large force applied manually, the locking state of the cover plate 2 is stable.

[0046] When the cover ear 10 leaves the stop surface 6 and the alloy wire is in the first matching groove 13, it is considered to have reached the open position. At this position, the arch wire can be replaced. The action of opening the cover plate 2 can be achieved by inserting the self-locking bracket opener into the gap between the cover plate 2 and the bracket body 1 and twisting it to open it.

[0047] In order to realize the self-locking function of the bracket, two sections of nickel-titanium alloy wire with a length of 1 mm and a diameter of 0.3 mm are respectively inserted into the first assembly hole 81 and the second assembly hole 82 with a depth of 0.8 mm and a diameter of 0.32 mm, and then the cover ear 10 of the cover plate 2 is pushed upward along the guide groove 7. Due to the presence of the gap area 9, the alloy wire is guaranteed to have a certain degree of bending room when being pushed, so that the alloy wire can be inserted into the matching groove along the pushing slope 11, and the cover plate 2 cannot slide out of the bracket body 1 at this time; when it is in the locked state, the upper part of the cover ear 10 is in contact with the stop surface 6, the cover ear 10 is inserted into the guide groove 7, and the alloy wire is in the second matching groove 14 of the cover plate 2. Due to the presence of the narrowing area 12, the alloy wire cannot pass through the narrowing area 12 under normal force, so the cover plate 2 is in a stable locked state; when the cover plate 2 is in the open state, the alloy wire is in the first matching groove 13 of the cover plate 2, and the inner side of the pushing slope 11 plays a role in preventing the cover plate 2 from falling.

[0048] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A sliding cover type orthodontic bracket based on 3D printing technology, comprising a bracket body (1) and a cover plate (2), characterized in that: The bracket body (1) comprises a bracket wing (3), a side groove wing (4) and a base (5); the bracket wing (3) and the side groove wing (4) are respectively fixedly connected to the base (5); the bracket wing (3) is located above the side groove wing (4); the side groove wing (4) is slidably sleeved with the cover plate (2); a gap area (9) and an assembly hole for the nickel-titanium alloy wire are provided at the upper end of the base (5); the assembly hole is located at the bottom of the gap area (9); the assembly hole comprises a first assembly hole (81) and a second assembly hole (82); the first assembly hole (81) and the second assembly hole (82) have the same depth and shape; A cover sheet (2), the cover sheet (2) comprising two cover ears (10) and a push slope (11), a narrowing area (12), a first matching groove (13) and a second matching groove (14) are provided in the middle of the cover ear (10), the narrowing area (12) is located between the first matching groove (13) and the second matching groove (14), and the push slope (11) is installed on the first matching groove (13) and away from the second matching groove (14).

2. The sliding cover orthodontic bracket based on 3D printing technology according to claim 1, characterized in that: The advancing slope (11) is in contact with the base (5).

3. The sliding cover orthodontic bracket based on 3D printing technology according to claim 2, characterized in that: A groove (15) is provided on the upper side of the base (5), and the groove (15) is located between the bracket wing (3) and the base (5).

4. The sliding cover orthodontic bracket based on 3D printing technology according to claim 2, characterized in that: There are two side groove wings (4), and the opposite surfaces of the two side groove wings (4) are each provided with a guide groove (7), and the two guide grooves (7) are respectively slidably sleeved with the two cover ears (10).

5. The sliding cover type orthodontic bracket based on 3D printing technology according to claim 3, characterized in that: A stop surface (6) is provided on one side of the bracket wing (3) close to the side groove wing (4), and the stop surface (6) is in contact with the cover ear (10).

6. The sliding cover type orthodontic bracket based on 3D printing technology according to claim 4, characterized in that: A traction hook is provided on one side of the bracket wing (3) away from the side slot wing (4).

7. The sliding cover orthodontic bracket based on 3D printing technology according to claim 5, characterized in that: The bottom surface of the base (5) is provided with a plurality of inlay rings, and the base (5) matches the curvature of the patient's teeth.

8. The sliding cover orthodontic bracket based on 3D printing technology according to claim 5, characterized in that: The shape of the narrowed area (12) is an arc-shaped notch, which is used to prevent the nickel-titanium alloy wire from passing through the first matching groove (13).

9. The sliding cover orthodontic bracket based on 3D printing technology according to claim 4, characterized in that: The first assembly hole (81) and the second assembly hole (82) are both holes with a depth of 0.8 mm and a diameter of 0.32 mm.

10. The sliding cover orthodontic bracket based on 3D printing technology according to claim 4, characterized in that: The depth of the gap area (9) is less than 0.1 mm.

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