Cantilever orthodontic brackets and orthodontic systems

Abstract

This application discloses a cantilever orthodontic bracket and an orthodontic system. The cantilever orthodontic bracket includes a base with an archwire groove, a cover plate movably mounted on the base, and an elastic element that restricts the relative position of the cover plate. The elastic element is rod-shaped, and the base has a mounting hole. The elastic element includes a fixed section inserted into the mounting hole and a working section extending to the movement path of the cover plate. The base is recessed in the movement path of the cover plate to form a clearance cavity, and the working section is suspended within the clearance cavity. The bottom surface of the cover plate facing the clearance cavity has continuously arranged open positioning grooves, transition ridges, and closed positioning grooves. When the cover plate is in the open / closed position, the working section is located within the open / closed positioning grooves. This application overcomes the problem of cumbersome adjustment of elastic element parameters in the prior art through optimized setting of the elastic element, and provides a structural basis for flexible setting of the elastic element, thereby providing a more adaptable treatment plan and improving treatment effect.

Description

Technical Field

[0001] The present application relates to the field of dental orthodontics, and in particular to a cantilevered correction bracket and a correction system. Background Art

[0002] Traditional oral appliances require ligatures or wires for ligature fixation during clinical use. This method is complicated to operate and seriously affects the efficiency of clinicians. On the other hand, ligature directly applies force to the appliance, which creates great pressure on the correction and is not conducive to the rapid alignment of teeth during the correction process, ultimately affecting the correction effect. Currently, with the rapid development of the orthodontic material industry, self-ligating brackets are becoming more and more popular. The advantages of self-ligating brackets over traditional ligature conventional brackets are generally accepted by doctors and patients. The operation is very simple during the correction process, and it saves time and effort when patients need to replace different types of dental arch wires in the later stage.

[0003] For example, a Chinese patent document with publication number CN110478062A discloses a bracket with a reliable structure, including a base with an archwire slot, a mesh bottom fixed on one side of the base, and a cover plate installed on the other side of the base, wherein the bottom surface of the cover plate and the top surface of the base are in contact with each other and slide in cooperation; a strip-shaped elastic member is installed on the top surface of the base, and two slots are arranged in sequence on the bottom surface of the cover plate along the sliding direction of the cover plate, and a transition ridge protruding toward the base is between the two slots; a part of the elastic member is a working section, and when the cover plate slides, the working section enters a corresponding slot via the transition ridge, and an avoidance groove is also provided on the top surface of the base to accommodate the deformation of the working section when it abuts against the transition ridge. The above technical solution realizes the positioning of multiple positions of the cover plate through the cooperation of the elastic member and the transition ridge, thereby ensuring the stability of the cover plate state, thereby ensuring the stability of the bracket state.

[0004] The inventors have discovered that in technical solutions similar to the prior art, the working state of the elastic member is relatively simple, and it is relatively complicated to set conditional parameters for different working conditions, and there is room for improvement. Summary of the invention

[0005] In order to solve the above technical problems, the present application discloses a cantilevered orthodontic bracket, comprising a base provided with an archwire slot, a cover plate movably arranged on the base, and an elastic member limiting the relative position of the cover plate, wherein the elastic member is rod-shaped, a mounting hole is provided on the base, the elastic member comprises a fixed section inserted into the mounting hole and a working section extending to the movement path of the cover plate, the base is recessed on the movement path of the cover plate to form an avoidance cavity, and the working section is suspended in the avoidance cavity;

[0006] The bottom surface of the cover plate facing the avoidance cavity is provided with a continuously arranged open positioning groove, a transition ridge and a closed positioning groove. When the cover plate is in the open position, the working section is located in the open positioning groove. When the cover plate is in the closed position, the working section is located in the closed positioning groove.

[0007] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0008] Optionally, the mounting hole is a through hole, one end of which is exposed to the outer surface of the base, and the other end of which is exposed to the avoidance cavity.

[0009] Optionally, the mounting hole and the fixing section cooperate as follows:

[0010] The diameter of the mounting hole is smaller than or equal to the outer diameter of the fixing section, so that an interference fit is formed during assembly;

[0011] The mounting hole and the fixing section are held in position relative to each other through a connection process or a connection component.

[0012] Optionally, the connection process includes bonding, welding, clamping, and screwing.

[0013] Optionally, the connecting component may be rod-shaped, cylindrical-shaped, or ring-shaped.

[0014] Optionally, the bottom surface of the avoidance cavity is recessed relative to the lower edge of the mounting hole to achieve avoidance, and the ratio between the recess depth D1 and the mounting hole radius R1 is 0.3 to 1.

[0015] Optionally, the axial direction of the mounting hole is arranged parallel to the axial direction of the elastic member, and the axial direction of the elastic member is arranged perpendicular to the movement direction of the cover plate.

[0016] Optionally, the plane where the elastic member is located in a natural state is taken as the adaptation plane, and the extension directions of the open positioning groove, the transition ridge and the closed positioning groove are parallel to the adaptation plane or intersect with the adaptation plane.

[0017] Optionally, the width of the avoidance cavity matches the length of the working section, and the length of the working section is greater than or equal to the length of the open positioning groove, the transition ridge and the closed positioning groove in the axial direction of the working section.

[0018] Optionally, an opening stop surface is provided on a side wall of the opening positioning groove away from the closing positioning groove, and when the cover plate is in the open position, the opening stop surface abuts against the working section to limit further opening of the cover plate.

[0019] Optionally, a closing stop surface is provided on a side wall of the closing positioning groove away from the opening positioning groove, and when the cover is in the closed position, the closing stop surface abuts against the working section to limit further closing of the cover.

[0020] The present application also discloses a correction system, including the cantilever correction bracket in the above technical solution.

[0021] The technical solution disclosed in the present application overcomes the problem of cumbersome adjustment of elastic component parameters in the prior art by optimizing the setting of elastic components, and at the same time provides a structural basis for the flexible setting of elastic components, thereby being able to provide a more adaptable treatment plan and improve the treatment effect.

[0022] The specific beneficial technical effects will be further explained in the specific implementation methods in combination with specific structures or steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a cantilevered orthodontic bracket in one embodiment;

[0024] Figure 2 for Figure 1 Schematic diagram of the internal parts of the cantilever orthodontic bracket;

[0025] Figure 3 A schematic diagram of a cover plate of a correction bracket in a closed position in one embodiment;

[0026] Figure 4 A schematic diagram of the movement process of the cover plate of the correction bracket in one embodiment;

[0027] Figure 5 A schematic diagram of a cover plate of a correction bracket in an open position in one embodiment;

[0028] Figure 6 for Figure 3 The enlarged schematic diagram of the avoidance cavity;

[0029] Figure 7 A schematic diagram of a correction bracket in an embodiment;

[0030] Figure 8 for Figure 7 Schematic diagram of the coordination of the internal components of the median correction bracket;

[0031] Fig. 9 for Figure 7 Schematic diagram of another matching mode of the internal parts of the middle correction bracket;

[0032] Fig.10 for Figure 7 Schematic diagram of another way the internal components of the medial correction bracket fit together.

[0033] The reference numerals in the figures are described as follows:

[0034] 1. Archwire slot;

[0035] 2. Base; 21. Mounting hole; 22. Avoidance cavity; 23. Adapter hole;

[0036] 3. Cover plate; 31. Open positioning groove; 32. Transition ridge; 33. Close positioning groove; 34. Open stop surface; 35. Close stop surface;

[0037] 4. Elastic member; 41. Fixed section; 42. Working section; 43. Adapting section. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] Reference Figure 1 To Attachment Figure 6 The present application discloses a cantilever type orthodontic bracket, comprising a base 2 provided with an archwire slot 1, a cover plate 3 movably arranged on the base 2, and an elastic member 4 for limiting the relative position of the cover plate 3, wherein the elastic member 4 is rod-shaped, a mounting hole 21 is provided on the base 2, the elastic member 4 comprises a fixed section 41 inserted into the mounting hole 21 and a working section 42 extending to the movement path of the cover plate 3, the base 2 is recessed on the movement path of the cover plate 3 to form an avoidance cavity 22, and the working section 42 is suspended in the avoidance cavity 22;

[0042] The bottom surface of the cover plate 3 facing the avoidance cavity 22 is provided with a continuously arranged open positioning groove 31, a transition ridge 32 and a closed positioning groove 33. The cover plate 3 is in the open position (see the attached Figure 5), the working section 42 is located in the open positioning groove 31, and the cover plate 3 is in the closed position (refer to the attached Figure 3 ), the working section 42 is located in the closing positioning groove 33.

[0043] The technical solution disclosed in the present application overcomes the problem of complicated parameter adjustment of the elastic member 4 in the prior art by optimizing the setting of the elastic member 4. The cantilevered elastic member 4 can provide a more delicate opening / closing feel while providing a richer parameter adjustment space without changing the overall size structure. At the same time, it provides a structural basis for the flexible setting of the elastic member 4, thereby providing a more adaptable treatment plan and improving the treatment effect.

[0044] In the prior art, there is still the problem that the elastic member 4 is not easy to install and the effect after installation cannot be visually inspected. Referring to the embodiment shown in the accompanying drawings, the mounting hole 21 is a through hole, one end of which is exposed to the outer surface of the base 2, and the other end is exposed to the avoidance cavity 22. This design can make the installation of the cover plate 3 and the installation of the elastic member 4 independent, and can conveniently realize visual inspection after the installation is completed, thereby improving the assembly efficiency and yield rate. In order to avoid the constraint failure of the cover plate 3 after the assembly is completed, referring to the embodiment shown in the accompanying drawings, an open stop surface 34 is provided on the side wall of the open positioning groove 31 away from the closed positioning groove 33. When the cover plate 3 is in the open position, the open stop surface 34 abuts against the working section 42 to limit the further opening of the cover plate 3. Compared with the transition ridge 32, the design concept of the open stop surface 34 is to constrain the extreme position of the cover plate 3, that is, when the elastic member 4 and the cover plate 3 are structurally intact, the cover plate 3 cannot overcome the constraint of the elastic member 4 and move further. The function of the transition ridge 32 is to provide a sense of segmentation, and the design allows the cover plate 3 to overcome the elastic force of the elastic member 4 to achieve movement (see attached Figure 4As shown, the dotted line position is the position of the elastic member in a free state, and the solid line position is the position where the elastic member is squeezed and deformed by the transition ridge 32 and enters the avoidance cavity 22). In detail, there is a smooth transition between the open positioning groove 31, the transition ridge 32 and the closed positioning groove 33. There is a non-smooth transition between the open stop surface 34 and the open positioning groove 31, or the open stop surface 34 is set in the direction of movement of the cover plate 3. Similarly, a closing stop surface 35 is provided on the side wall of the closing positioning groove 33 away from the open positioning groove 31. When the cover plate 3 is in the closed position, the closing stop surface 35 abuts against the working section 42 to limit the further closing of the cover plate 3. The function of the closing stop surface 35 is similar to that of the opening stop surface 34, and the design concept is to constrain the extreme position of the cover plate 3. Therefore, there is a non-smooth transition between the closing stop surface 35 and the closing positioning groove 33, or the opening stop surface 34 is set in the direction of movement of the cover plate 3. The cover plate 3 may also be provided with a plurality of closing stop surfaces 35. For example, as shown in the accompanying drawings, when the cover plate 3 is in the closed position, the end surface of the cover plate 3 located above the archwire slot 1 abuts against or partially abuts against the base 2, thereby providing a certain closing stop effect. The partially abutting setting can provide a certain gap, which facilitates opening the cover plate 3 and facilitates the instrument to apply a force to the cover plate 3.

[0045] In order to ensure the stability of the cantilever setting of the elastic member 4, it is necessary to ensure the assembly effect of the mounting hole 21 and the elastic member 4, especially the assembly effect with the fixed section 41. It can be referred to in one embodiment, which is achieved by interference fit. However, in actual processing, interference fit will increase the difficulty of installation. In actual products, the aperture of the mounting hole 21 is equal to the outer diameter of the elastic member 4. The positive and negative tolerances of the matching parts processing can achieve the effect of slight interference fit and easy assembly between the two. It can also be referred to in other embodiments that the mounting hole 21 and the fixed section 41 are mutually positioned by a connection process or a connection component. The specific connection process includes bonding, welding, clamping, and screwing. The specific connection component can be rod-shaped, cylindrical, or annular. The advantage of the interference fit setting is that the assembly process is simple, but the relative processing process for the components is relatively high; the advantage of assembling by a connection process or a connection component is that the requirements for the production process can be reduced, and the process will be relatively increased. Different connection methods can be selected under different design conditions.

[0046] In the assembly direction, referring to the embodiment shown in the accompanying drawings, the axial direction of the mounting hole 21 is arranged parallel to the axial direction of the elastic member 4, and the axial direction of the elastic member 4 is arranged perpendicular to the movement direction of the cover plate 3. Further, the plane where the elastic member 4 is located in the natural state is taken as the adaptation plane, and the extension directions of the open positioning groove 31, the transition ridge 32 and the closed positioning groove 33 are parallel to the adaptation plane or intersect with the adaptation plane. The natural state of the elastic member 4 refers to the state of the elastic member 4 without the action of external force after the assembly is completed.

[0047] In combination with the above, the working effect of the elastic member 4 depends on its own deformation, and the avoidance cavity 22 can release the deformation of the elastic member 4, providing a certain restraining effect. In terms of matching details, referring to the embodiment shown in the accompanying drawings, the bottom surface of the avoidance cavity 22 is recessed relative to the lower edge of the mounting hole 21 to achieve avoidance, and the ratio between the recess depth D1 and the radius R1 of the mounting hole 21 is 0.3 to 1. The above-mentioned setting can realize the deformation stroke of the working section 42 relative to the fixed section 41, thereby fully realizing the working efficiency of the "cantilever" structure. The width of the avoidance cavity 22 matches the length of the working section 42, and the length of the working section 42 is greater than or equal to the length of the open positioning groove 31, the transition ridge 32 and the closed positioning groove 33 in the axial direction of the working section 42.

[0048] It is not difficult to understand from the above description that the present application also discloses a correction system, including the cantilever correction bracket in the above technical solution. When there are multiple correction brackets, all of them can be cantilevered, or they can be cantilevered or non-cantilevered independently.

[0049] Reference Figure 7 To Attachment Fig.10 From another perspective, the present application also discloses a flattened orthodontic bracket, including a base 2 provided with an archwire slot 1, a cover plate 3 movably arranged on the base 2, and an elastic member 4 for limiting the relative position of the cover plate 3. A mounting hole 21 is opened on the base 2, and the elastic member 4 is in the shape of a rod inserted in the mounting hole 21. In the height direction of the base 2, the geometric center of the mounting hole 21 is lower than the geometric center of the archwire slot 1.

[0050] The technical solution disclosed in the present application can effectively reduce the overall height of the correction bracket while ensuring the locking effect, achieve a flat setting, and provide a better treatment experience by adjusting the setting position of the elastic member 4, especially the change of the geometric center of the mounting hole 21. In the actual product, the ratio of the distance S1 between the geometric center of the mounting hole 21 and the geometric center of the archwire slot 1 to the overall height H1 of the correction bracket ranges from 0.05 to 0.2. The setting of this parameter range can ensure the normal assembly and operation of the various components inside the bracket while ensuring the overall flattening of the correction bracket, avoiding the difficulty of assembly due to the overly compact size.

[0051] In terms of the details of the installation hole 21, referring to the embodiment shown in the attached drawings, the installation hole 21 is a circular hole, and in the height direction of the base 2, at least a portion of the installation hole 21 is located below the bottom surface of the archwire slot 1. That is, the geometric center of the installation hole 21 can be set as follows: higher than the bottom surface of the archwire slot 1, flush with the bottom surface of the archwire slot 1, or lower than the bottom surface of the archwire slot 1. In terms of the matching details of the installation hole 21 and the elastic member 4, it can be set that the fixing section 41 is flush with the side edge of the installation hole 21 located on the outer peripheral surface of the base 2, and can also refer to the attached drawings. Fig.10In the embodiment shown, the mounting hole 21 is a stepped hole, including a large-diameter hole connected to the outer peripheral surface of the base 2 and a small-diameter hole located at the large-diameter hole, and the fixing section 41 is flush with the side edge of the small-diameter hole. Regardless of how it is set, the end surface of the fixing section 41 needs to be flush with a certain plane to ensure installation accuracy and improve assembly efficiency.

[0052] The installation method of the elastic member 4 can refer to the above description. The elastic member 4 includes a fixed section 41 inserted into the installation hole 21 and a working section 42 extending to the movement path of the cover plate 3. The base 2 is recessed on the movement path of the cover plate 3 to form an avoidance cavity 22. The working section 42 is suspended in the avoidance cavity 22. The specific settings are as described above and will not be repeated here.

[0053] You can also refer to the attached Fig.10 In the illustrated embodiment, the elastic member 4 includes a fixed section 41 inserted into the mounting hole 21, a working section 42 extending to the movement path of the cover plate 3, and an adapting section 43 arranged at the other end of the working section 42. An adapting hole 23 corresponding to the mounting hole 21 is provided on the base 2. The adapting section 43 is assembled in the adapting hole 23. The base 2 is recessed between the mounting hole 21 and the adapting hole 23 to form an avoidance cavity 22 located on the movement path of the cover plate 3. The working section 42 is suspended in the avoidance cavity 22.

[0054] For details, refer to the attached Fig.10 In the embodiment shown, the diameter of the adapter hole 23 is slightly larger than the outer diameter of the adapter section 43. In the actual product, the elastic member 4 is an integrated structure, the outer diameters of the fixed section 41, the working section 42 and the adapter section 43 are equal, and the diameter of the adapter hole 23 is 0.01 to 0.1 mm larger than the diameter of the mounting hole 21. The mounting hole 21 and the adapter hole 23 are both through holes and are aligned with each other. In the axial direction of the elastic member 4, the length of the elastic member 4 is slightly shorter than the maximum distance between the mounting hole 21 and the adapter hole 23.

[0055] It is not difficult to understand that the present application also discloses a correction system, including the flattened correction bracket in the above technical solution.

[0056] The cantilevered orthodontic brackets and flattened orthodontic brackets mentioned in this application can be understood as understanding the technical solutions of this application from different perspectives. The technical features in the two embodiments can be combined with each other without obvious conflicts. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0057] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A cantilevered orthodontic bracket, comprising a base provided with an archwire slot, a cover plate movably arranged on the base, and an elastic member for limiting the relative position of the cover plate, characterized in that: The base is provided with a mounting hole, the base is recessed on the movement path of the cover plate to form an avoidance cavity, the mounting hole is a through hole, one end of which is exposed to the outer surface of the base, and the other end is exposed to the avoidance cavity, the bottom surface of the avoidance cavity is recessed relative to the lower edge of the mounting hole to achieve avoidance, and the ratio between the recessed depth D1 and the mounting hole radius R1 is 0.3 to 1; The elastic member is rod-shaped, and comprises a fixed section inserted into the mounting hole and a working section extending to the movement path of the cover plate, and the working section is suspended in the avoidance cavity; The mounting hole and the fixing section cooperate as follows: The diameter of the mounting hole is smaller than or equal to the outer diameter of the fixing section, forming an interference fit during assembly; or The mounting hole and the fixing section are kept in position with each other by a connection process or a connection component; The bottom surface of the cover plate facing the avoidance cavity is provided with a continuously arranged open positioning groove, a transition ridge and a closed positioning groove. When the cover plate is in the open position, the working section is located in the open positioning groove. When the cover plate is in the closed position, the working section is located in the closed positioning groove.

2. The cantilevered orthodontic bracket according to claim 1, characterized in that: The axial direction of the mounting hole is arranged parallel to the axial direction of the elastic member, and the axial direction of the elastic member is arranged perpendicular to the movement direction of the cover plate.

3. The cantilevered orthodontic bracket according to claim 2, characterized in that: The plane where the elastic member is located in the natural state is taken as the adaptation plane, and the extension directions of the open positioning groove, the transition ridge and the closed positioning groove are parallel to the adaptation plane or intersect with the adaptation plane.

4. The cantilevered orthodontic bracket according to claim 3, characterized in that: The width of the avoidance cavity matches the length of the working section, and the length of the working section is greater than or equal to the length of the open positioning groove, the transition ridge and the closed positioning groove in the axial direction of the working section.

5. The cantilevered orthodontic bracket according to claim 1, characterized in that: An opening stop surface is provided on the side wall of the opening positioning groove away from the closing positioning groove. When the cover plate is in the open position, the opening stop surface abuts against the working section to limit further opening of the cover plate.

6. The cantilevered orthodontic bracket according to claim 1, characterized in that: A closing stop surface is provided on the side wall of the closing positioning groove away from the opening positioning groove. When the cover plate is in the closed position, the closing stop surface abuts against the working section to limit further closing of the cover plate.

7. A correction system, characterized in that: It comprises a plurality of cantilever orthodontic brackets according to any one of claims 1 to 6.

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