阅读说明：本技术 自锁托槽、双翼间距可调托槽及牙齿矫正器 (Self-ligating bracket, double-wing interval adjustable bracket and dental appliance ) 是由 许天民 许开元 于 2021-09-14 设计创作，主要内容包括：本发明提供一种自锁托槽、双翼间距可调托槽及牙齿矫正器。该自锁托槽包括：托槽底板；第一弹性支架的第一端连接于托槽底板上；托槽本体为中空结构,第一弹性支架的第二端连接于托槽本体的远心端,托槽本体的远心端设有间隙并由第一弹性支架的第二端将托槽本体的远心端沿径向撑开；限位部件沿托槽本体的轴向可动设置,且限位部件套设于托槽本体的外侧,用于克服第一弹性支架提供的弹性力并使得托槽本体沿径向收缩。本发明的自锁托槽、双翼间距可调托槽及牙齿矫正器,可以实现矫正弓丝与槽沟之间的临界余隙角在唇舌向和龈向的大小均可调；患者可以自己手动调节余隙,从而满足不同矫正阶段的需要,减少患者复诊次数,提高矫正效率。(The invention provides a self-ligating bracket, a bracket with adjustable distance between double wings and a dental appliance. The self-ligating bracket comprises: a bracket base plate; the first end of the first elastic bracket is connected to the bracket bottom plate; the bracket body is of a hollow structure, the second end of the first elastic bracket is connected to the far-end of the bracket body, a gap is arranged at the far-end of the bracket body, and the second end of the first elastic bracket radially supports the far-end of the bracket body; the limiting component is movably arranged along the axial direction of the bracket body, and the limiting component is sleeved on the outer side of the bracket body and used for overcoming the elastic force provided by the first elastic support and enabling the bracket body to contract along the radial direction. The self-ligating bracket, the double-wing interval adjustable bracket and the tooth appliance can realize that the critical clearance angle between the correcting arch wire and the groove can be adjusted in the labial-lingual direction and the gingival direction; the patient can adjust the clearance by oneself to satisfy the needs of different correction stages, reduce patient's number of times of diagnosing again, improve and correct efficiency.)

1. A self-ligating bracket, comprising:

a bracket base plate;

the first end of the first elastic bracket is connected to the bracket bottom plate;

the bracket body is of a hollow structure, the second end of the first elastic support is connected to the far-end of the bracket body, a gap is formed in the far-end of the bracket body, and the far-end of the bracket body is radially stretched by the second end of the first elastic support;

the limiting component is movably arranged along the axial direction of the bracket body, and the limiting component is sleeved on the outer side of the bracket body and used for overcoming the elastic force provided by the first elastic support and enabling the bracket body to contract along the radial direction.

2. The self-ligating bracket of claim 1, wherein the bracket body comprises a first platform and a second platform which are symmetrically arranged, the first platform and the second platform are correspondingly arranged and are separated by the first elastic support to form a circular truncated cone structure, and the gap is located between the first platform and the second platform.

3. The self-ligating bracket of claim 1, wherein the retaining feature is a threaded member, the bracket body is provided with an external thread along an axial direction on an outside thereof, the threaded member is provided with an internal thread adapted to the external thread, and the threaded member is connected with the bracket body by the internal thread and the external thread in a meshing manner.

4. The self-ligating bracket of claim 2, further comprising a second resilient mount having a first end attached to the bracket base and a second end supported on the proximal end of the bracket body and radially opening the first and second blocks at the proximal end for insertion of a corrective archwire.

5. The self-ligating bracket of claim 4, wherein the first resilient support is a cross-over configuration, the first end of the second resilient support is a splayed configuration, and the second end of the second resilient support is a vertical configuration.

6. The self-ligating bracket of claim 1, wherein the cross-section of the hollow structure of the proximal end of the bracket body is circular, the cross-section of the hollow structure of the distal end of the bracket body is rectangular, and the hollow structure of the bracket body from the proximal end to the distal end tapers from circular to rectangular.

7. The self-ligating bracket of claim 1, wherein a first scale mark is provided on an outer wall of the restraining member along a circumferential direction, and/or,

and a second scale mark is arranged on the outer wall of the bracket body along the axial direction.

8. The self-ligating bracket of claim 1, wherein the restraining member is a C-shaped structure, and the outer wall of the restraining member is roughened and/or provided with a hole for insertion of a needle-like tool.

9. A twin-winged spacing adjustable bracket comprising two self-ligating brackets as described in any of claims 1-8, said self-ligating brackets being axially aligned.

10. An appliance, comprising: a plurality of self-ligating brackets according to any of claims 1 to 8 or twin-winged spacing adjustable brackets according to claim 9, and an orthodontic archwire passing sequentially from the interior of adjacent bracket bodies.

Technical Field

The invention relates to the technical field of dental orthodontics, in particular to a self-ligating bracket, a double-wing interval adjustable bracket and a dental orthodontics.

Background

The brackets of the orthodontics on the market at home and abroad at present are of ligation type and self-locking type. The ligature bracket uses ligature wire or ligature ring to bind the correction arch wire in the bracket groove; the cover plate of the notch for the self-locking bracket limits the archwire in the slot so there is usually a clearance between the archwire and the cover plate. The cover plate of the self-ligating bracket is divided into two designs, one is not elastic, and the cover plate can not actively apply pressure to the arch wire, so that the self-ligating bracket is called a passive self-ligating bracket; and the other is elastic, and when the size of the arch wire exceeds the lowest limit allowed by the elastic cover plate, the arch wire is stressed, so the bracket is called an active self-ligating bracket. In both passive self-ligating brackets and active self-ligating brackets, the clearance between the arch wire and the cover plate is larger than that of a ligating bracket, the larger the clearance is, the larger the critical clearance angle of deformation of the arch wire is, once the included angle between the arch wire and the groove is larger than the critical clearance angle, the arch wire begins to elastically deform, and the frictional resistance is further increased. Therefore, from the analysis of mechanics, the friction force of the self-ligating bracket is lower than that of the ligating bracket because the critical clearance angle is large; on the other hand, however, a large critical clearance angle means that the archwire will not elastically deform when the teeth are slightly misaligned, i.e., the corrective force to which the teeth are subjected is small, and thus the self-ligating brackets will have less ability to control the position of the teeth than ligating brackets. The self-locking bracket is low in friction force and rapid in congestion relief, so that the self-locking bracket can be clinically applied to the early stage of orthodontic treatment, but when teeth need to be completely aligned in the later stage of orthodontic treatment, the clearance between the self-locking bracket and an arch wire is large, and the efficiency of accurately aligning the tooth positions is reduced, so that the research result of modern evidence-based medicine does not support the improvement of the tooth correcting efficiency of the self-locking bracket.

Therefore, how to improve the orthodontic efficiency at each stage of the orthodontic treatment is an urgent problem to be solved.

Disclosure of Invention

The invention provides a self-ligating bracket, a double-wing interval adjustable bracket and a dental appliance, which are used for solving the problem of how to improve the dental appliance efficiency in the prior art.

The present invention provides a self-ligating bracket comprising:

a bracket base plate;

the first end of the first elastic bracket is connected to the bracket bottom plate;

the bracket body is of a hollow structure, the second end of the first elastic support is connected to the far-end of the bracket body, a gap is formed in the far-end of the bracket body, and the far-end of the bracket body is radially stretched by the second end of the first elastic support;

the limiting component is movably arranged along the axial direction of the bracket body, and the limiting component is sleeved on the outer side of the bracket body and used for overcoming the elastic force provided by the first elastic support and enabling the bracket body to contract along the radial direction.

According to the self-ligating bracket provided by the invention, the bracket body comprises a first platform body and a second platform body which are symmetrically arranged, the first platform body and the second platform body are correspondingly arranged and are propped open by the first elastic support to form a circular truncated cone structure, and the gap is positioned between the first platform body and the second platform body.

According to the self-ligating bracket provided by the invention, the limiting part is a threaded member, the outer side of the bracket body is provided with an external thread along the axial direction, the threaded member is provided with an internal thread matched with the external thread, and the threaded member is connected with the bracket body through the internal thread and the external thread in a meshing manner.

According to the self-ligating bracket provided by the invention, the self-ligating bracket further comprises a second elastic bracket, wherein the first end of the second elastic bracket is connected to the bracket bottom plate, and the second end of the second elastic bracket is supported on the proximal end of the bracket body and radially expands the first table body and the second table body at the proximal end for inserting a gap for correcting an arch wire.

According to the self-ligating bracket provided by the invention, the first elastic bracket is of a cross structure, the first end of the second elastic bracket is of an inverted V-shaped structure, and the second end of the second elastic bracket is of a vertical structure.

According to the self-ligating bracket provided by the invention, the cross section of the hollow structure at the proximal end of the bracket body is circular, the cross section of the hollow structure at the distal end of the bracket body is rectangular, and the hollow structure of the bracket body from the proximal end to the distal end is gradually changed from circular to rectangular.

According to the self-ligating bracket provided by the invention, the outer wall of the limiting part is provided with a first scale mark along the circumferential direction, and/or,

and a second scale mark is arranged on the outer wall of the bracket body along the axial direction.

According to the self-ligating bracket provided by the invention, the limiting part is of a C-shaped structure, and the outer wall of the limiting part forms a rough surface and/or is provided with a hole for inserting a needle-shaped tool.

The invention also provides a bracket with adjustable distance between double wings, which comprises two self-ligating brackets of the invention, and the self-ligating brackets are axially and correspondingly arranged.

The present invention also provides an appliance comprising: the orthodontic bracket comprises an orthodontic arch wire and a plurality of self-ligating brackets or double-wing interval adjustable brackets, wherein the orthodontic arch wire sequentially penetrates through the interiors of adjacent bracket bodies.

The self-ligating bracket provided by the invention takes the bracket bottom plate as a support, the bracket bottom plate and the bracket body are connected through the first elastic bracket, and elastic force is provided for the far-end of the bracket body so as to radially expand the far-end by a certain gap, the limiting component moves along the axial direction of the bracket body, and the bracket body overcomes the elastic force provided by the first elastic bracket, so that the bracket body contracts along the radial direction. According to the self-locking bracket provided by the invention, the critical clearance angle between the labial-lingual groove and the arch wire can be adjusted by utilizing the axial movement of the limiting part, and the gingival-directional size can be adjusted by adjusting the bracket body to expand or contract along the radial direction through the limiting part and the first elastic bracket, so that the clearance between the arch wire and the bracket body can be accurately adjusted and corrected, and the clearance can be adjusted to be enlarged when low friction is required and to be reduced when the tooth position is required to be accurately controlled; in addition, the self-ligating bracket of the invention can avoid the defect of frequently replacing the correcting arch wire, and the patient can manually adjust the clearance under the guidance of the doctor, thereby meeting the requirements of different correcting stages, reducing the times of the patient's return visit, improving the correcting efficiency and improving the economy.

Furthermore, the invention also provides a bracket with adjustable distance between two wings, which adopts a bracket structure with adjustable distance between two wings, and the critical clearance angle between the bracket groove and the arch wire can be adjusted in the labial and lingual directions and the gingival directions, so that the friction force and the twisting force can be adjusted according to clinical requirements, the frequency of the return visit is reduced, and the correction efficiency is improved.

Still further, the present invention provides an orthodontic appliance including the self-ligating brackets or the twin-winged spacing adjustable brackets described above, and therefore, having the same advantages as above.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a self-ligating bracket provided by the present invention;

FIG. 2 is a schematic cross-sectional view of a distal end of a bracket base provided by the present invention;

FIG. 3 is a schematic cross-sectional view of a proximal end of a bracket base provided by the present invention;

FIG. 4 is a cross-sectional schematic view of a spacing member provided by the present invention;

FIG. 5 is a schematic top view of a double-winged spacing adjustable bracket provided by the present invention;

FIG. 6 is a schematic structural view of a bracket with adjustable distance between two wings provided by the present invention.

Reference numerals:

1: a bracket base plate; 2: a first elastic support; 3: a bracket body;

301: a distal end; 302: a proximal end; 4: a limiting component;

5: a second elastic support; 311: a first stage body; 312: a second stage body;

401: and (4) holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A self-ligating bracket of the present invention is described below in conjunction with FIGS. 1-4. The self-ligating bracket comprises: bracket bottom plate 1, first elastic support 2, second elastic support 5, hold in the palm groove body 3 and spacing part 4 and constitute.

Wherein, the bracket bottom plate 1 is used as the bottom support of the whole self-ligating bracket, and the bracket bottom plate 1 is stuck on the tooth.

The first ends of the first elastic bracket 2 and the second elastic bracket 5 are welded on the bracket bottom plate 1, and the second ends are welded on the bracket body 3. The elastic bracket can be made of a coarse nickel titanium wire, has certain elasticity, and is supported by an elastic material, so that on the one hand, the gap between the bracket bodies 3 can be expanded, and the size of the groove can be adjusted by matching with the limiting component 4; in the second aspect, when harder correcting arch wires such as stainless steel thick arch wires are used, the elastic bracket is beneficial to buffering excessive correcting force and transferring a part of correcting force to the elastic bracket, so that the correcting process is soft and continuous; in a third aspect, when a large accidental stress acts on the bracket body 3 (such as biting hard food), the elastic bracket can provide a certain buffering function, and the falling rate of the bracket is reduced.

The bracket body 3 is of a hollow structure, the second end of the second elastic bracket 5 is connected to the proximal end 302 of the bracket body 3, the bracket radially expands the proximal end 302 of the bracket body 3 by a slot gap of 0.018 +/-0.004 inches, the size of the gap is required to meet the requirement that the thickest correction arch wire can be inserted, the second end of the first elastic bracket 2 is connected to the distal end 301 of the bracket body 3, the distal end 301 of the bracket body 3 is provided with a gap and radially expands the distal end 301 of the bracket body 3 by the second end of the first elastic bracket 2, and the expanded gap is larger than the gap of the proximal end. The correcting arch wire can pass through the hollow structure of the bracket body 3, and the correcting arch wire is fixed by the inner wall of the bracket body 3. Generally, a position near the center of the tooth is defined as a proximal end 302 of the bracket body 3, and a position away from the center of the tooth is defined as a distal end 301 of the bracket body 3. A gap in the axial direction is provided at the distal end 301 of the bracket body 3 so that the distal end 301 can be spread by the force provided by the first resilient mount 2. It will be appreciated that, in general, the outer diameter of the proximal end 302 of the bracket body 3 should be smaller than the outer diameter of the distal end 301 of the bracket body 3 under the urging force of the first and second resilient supports 2, 5, but clearance exists between the inner wall of the bracket body 3 and the orthodontic archwire, so that the wall thicknesses of the distal and proximal ends 301, 302 can be adjusted appropriately and sufficient radial retention of the stop member 4 against the outer walls of the proximal and distal ends 302, 301 is ensured.

The limiting component 4 is movably arranged along the axial direction of the bracket body 3, and the limiting component 4 is sleeved outside the bracket body 3 and used for overcoming the elastic force provided by the elastic support and enabling the bracket body 3 to contract along the radial direction. The starting position of the limiting part 4 is located at the proximal end 302 of the bracket body 3, the limiting part 4 is gradually moved towards the distal end 301, and under the influence of the acting force of the limiting part 4, the gap between the two semi-cylindrical bracket bodies is gradually reduced, so that the gap between the correcting arch wire and the bracket body 3 is reduced. It should be understood that in the present embodiment, the gap between the orthodontic archwire and the bracket body 3 is adjusted by moving the limiting component 4 along the axial direction of the bracket body 3 to limit the radial direction of the bracket body 3. In particular, the limit member 4 may be screwed into the bracket body 3, and when the limit member 4 is rotated, it may move in the axial direction of the bracket body 3.

The self-ligating bracket provided by the invention takes the bracket bottom plate 1 as a support, the bracket bottom plate 1 and the bracket body 3 are connected through the elastic bracket, and the elastic force is provided for the bracket body, so that the proximal end 302 and the distal end 301 are radially expanded by a certain gap (the gap of the distal end is larger than that of the proximal end), the bracket body 3 is made to overcome the elastic force provided by the elastic bracket by utilizing the axial movement of the limiting part 4 along the bracket body 3, and the bracket body 3 is made to radially contract. According to the self-locking bracket provided by the invention, the critical clearance angle between the labial-lingual groove and the arch wire can be adjusted by utilizing the axial movement of the limiting component 4, and the gingival-directional size can be adjusted by adjusting the bracket body 3 to expand or contract along the radial direction through the limiting component 4 and the elastic bracket, so that the clearance between the arch wire and the bracket body 3 can be accurately adjusted and corrected, and the clearance can be adjusted to be enlarged when low friction is required and to be reduced when the tooth position is required to be accurately controlled; in addition, the self-ligating bracket of the invention can avoid the defect of frequently replacing the correcting arch wire, and the patient can manually adjust the clearance under the guidance of the doctor, thereby meeting the requirements of different correcting stages, reducing the times of the patient's return visit, improving the correcting efficiency and improving the economy.

In one embodiment of the present invention, the bracket body 3 is formed by a plurality of single bodies, the plurality of single bodies are circumferentially arranged, and a gap is arranged between two adjacent single bodies. For example, the bracket body 3 includes a first platform 311 and a second platform 312 that are symmetrically arranged, the first platform 311 and the second platform 312 are correspondingly arranged and are spread by an elastic support to form a circular truncated cone structure, and a gap is located between the first platform 311 and the second platform 312. As shown in fig. 1, in this embodiment, the first platform 311 and the second platform 312 are in a half-and-half structure, and when they are separated, a circular truncated cone structure with an outer diameter of the proximal end 302 smaller than that of the distal end 301 is formed, wherein the initial position of the position-limiting component 4 is to be sleeved on the proximal end 302, and a labial gap capable of allowing the coarsest orthodontic archwire to be inserted is ensured to exist between the first platform 311 and the second platform 312 of the proximal end 302. In this embodiment, the wall thickness of the distal end 301 and the proximal end 302 may be designed to be equal, so that when the limiting part 4 is far away from the distal end 301, the outer diameter of the distal end 301 is larger than the outer diameter of the proximal end 302, which also means that the inner diameter of the distal end 301 is larger than the inner diameter of the proximal end 302, as the limiting part 4 approaches the distal end 301, the gap is continuously reduced, the inner diameter of the distal end 301 is continuously tightened, the critical clearance angle between the orthodontic archwire and the inner wall of the bracket body 3 is correspondingly reduced, and the control capability of the tooth position is increasingly stronger; when the limiting part 4 moves to the far end 301, the diameters of the far end 301 and the near end 302 of the bracket body 3 are equal, and the bracket body 3 forms a cylindrical structure.

In one embodiment of the invention, the limiting part 4 is a threaded member, the outer side of the bracket body 3 is provided with an external thread which is screwed along the axial direction, the threaded member is provided with an internal thread which is matched with the external thread, and the threaded member is connected with the bracket body 3 through the internal thread and the external thread in a meshing way. In the present embodiment, the limiting component 4 is connected with the bracket body 3 through internal and external threads, and when the limiting component 4 is rotated, the limiting component can move along the axial direction of the bracket body 3. It will be appreciated that there should be some resistance to the threaded connection between the stop member 4 and the bracket body 3, to avoid rotation of the stop member 4 by brushing teeth or by foreign objects touching it. Of course, also can be connected through a plurality of buckle parts along holding in the palm groove body 3 axial setting between spacing part 4 and the groove body 3, and spacing part 4 inner wall is equipped with the concave part promptly, holds in the palm the groove body 3 outer wall and is equipped with the epirelief, through the joint between epirelief and the concave part, realizes that spacing part 4 is in the axial positioning who holds in the palm groove body 3, and spacing part 4 also has radial limiting displacement to holding in the palm groove body 3 simultaneously.

When a large friction force is needed, the positive rotation limiting component 4 moves towards the far end 301, the bracket body 3 is continuously tightened, the critical clearance angle between the correcting arch wire and the bracket body 3 is correspondingly reduced, and the control capability on the tooth position is stronger and stronger. Generally, when the bracket structure with the adjustable distance between the two wings is adopted, when the limiting parts 4 move towards the far end 301, the distance between the two limiting parts 4 is increased, and the critical clearance angle between the correcting arch wire and the bracket body 3 can also be reduced, so that the included angle between the correcting arch wire and the bracket body 3 is easier to exceed the critical clearance angle and generate elastic deformation, and further the capability of aligning teeth is increased. On the contrary, when the friction force needs to be reduced, the limiting component 4 is reversely rotated to move towards the proximal end 302, so that the distal end 301 is opened under the action of the first elastic support 2, the size of the groove is increased, and the clearance between the orthodontic arch wire and the bracket body 3 is further increased. When both stop members 4 are moved toward the proximal end 302, the distance between the stop members 4 may be decreased, increasing the critical clearance angle.

In one embodiment of the invention, the self-ligating bracket further comprises a second elastic support 5, a first end of the second elastic support 5 is connected to the bracket base plate 1, a second end of the second elastic support 5 is supported on the proximal end 302 of the bracket body 3, and the second elastic support 5 opens the first table body 311 and the second table body 312 at the position of the proximal end 302 into a gap in which a corrective arch wire can be inserted. In this embodiment, the second elastic support 5 is connected between the bracket base plate 1 and the bracket body 3 by welding, and is mainly used for supporting the proximal end 302, and it can also be made of elastic materials such as thick nickel titanium wires, and when the correction arch wire is made of hard stainless steel wires, the first elastic support 2 and the second elastic support 5 help to relieve the problem of too large correction force, and transfer a part of correction performance of the correction arch wire to the elastic supports. It should be understood that the bracket base 1, the first elastic support 2 and the second elastic support 5 may be integrally manufactured or welded as described above, and the present invention is not limited to the connection relationship and the manufacturing process of the three.

In one embodiment of the present invention, the cross-section of the hollow structure of the proximal end 302 of the bracket body 3 is a circle with a diameter of 0.025 + -0.003 inches, the cross-section of the hollow structure of the distal end 301 of the bracket body 3 is a rectangle with a diameter of 0.018 × 0.025-0.022 × 0.028 inches, and the hollow structure of the bracket body 3 from the proximal end 302 to the distal end 301 is a rectangle gradually changed from a circle to a rectangle to accommodate the thick square wire commonly used in orthodontics. The rectangular nozzle from the thick circular tube at the proximal end 302 to the distal end 301 is designed to be gradually inclined, that is, the hollow structure of the bracket body 3 gradually decreases from the proximal end 302 to the distal end 301, and finally becomes a rectangular nozzle. The above is exemplified by a bracket structure with adjustable distance between two wings, and if a single-wing bracket structure is adopted, the cross sections of the hollow structures at the proximal end and the distal end are both rectangular and have the same size.

In one embodiment of the invention, a first scale mark is arranged on the outer wall of the limiting part 4 along the circumferential direction, and/or a second scale mark is arranged on the outer wall of the bracket body 3 along the axial direction. In this embodiment, in order to observe the position of the limiting part 4 conveniently, the first scale mark and/or the second scale mark can be used for representing, so that the tightening degree of the bracket body 3 can be measured, a doctor can guide a patient, and the effect of applying force to move teeth can be achieved by properly adjusting the position of the limiting part 4 in different stages of correction.

In one embodiment of the present invention, as shown in fig. 4, the position-limiting member 4 has a C-shaped structure, and the outer wall of the position-limiting member 4 is formed with a rough surface and/or is provided with a hole 401 for inserting a needle-shaped tool. In this embodiment, the C-shaped structure forms a gap in the upper portion of the circular ring structure. When the limiting part 4 is arranged at the proximal end 302, the notch position of the C-shaped structure faces towards the lip, so that on one hand, the orthodontics arch wire is conveniently inserted into the hollow structure of the bracket body 3 from the limiting part 4; on the other hand, it is possible to arrange the first elastic support 2 in a crossed configuration (an "X" configuration as shown in fig. 2) and connect two branches of the first elastic support 2 to the first stage 311 and the second stage 312, respectively; the first end of the second elastic support 5 is in a splayed structure, and the second end of the second elastic support 5 is in a vertical structure, so that the C-shaped structure of the limiting component can be conveniently sleeved in the bracket body from the end and assembled on the bracket body (as shown in fig. 3), and two branches of the second elastic support 5 are respectively connected to the first table body 311 and the second table body 312. When the limiting component 4 is sleeved by the proximal end 302, the notch of the C-shaped structure can pass through the vertical structure of the second elastic support 5 and is blocked by the first elastic support 2 when moving to the distal end 301, so that the limiting component 4 is prevented from being separated from the distal end 301. Moreover, the crossed structure of the first elastic support 2 and the splayed structure of the second elastic support 5 prolong the support length, and further increase the buffering performance. In order to facilitate the patient to adjust the position limiting component 4 by himself, the outer wall of the position limiting component 4 is provided with a rough surface such as stripes, friction force is increased, and the position limiting component 4 can be operated to rotate.

In addition, as shown in fig. 2 and 3, the bracket body 3 is configured with an arc-shaped portion at a position adjacent to the hollow structure in order to correct the entry of the archwire into the hollow structure.

As shown in FIGS. 5 and 6, the present invention further provides a twin-winged spacing adjustable bracket comprising two self-ligating brackets provided according to the present invention, which are axially disposed on a tooth in a corresponding manner.

Specifically, the double-wing interval adjustable bracket of the embodiment is composed of two self-ligating brackets, in the adjusting process, the limiting parts 4 of the two self-ligating brackets can be adjusted simultaneously to form a double-wing interval adjustable bracket structure, the limiting part 4 of one self-ligating bracket can also be fixed at the position of the proximal end 302 of the C-shaped opening facing the labial clearance, and only the limiting part 4 of the other self-ligating bracket is adjusted to form a single-wing bracket structure.

It should be understood that the present embodiment provides a bracket with adjustable distance between two wings, which is a self-ligating bracket fixed to a tooth for fixing an orthodontic archwire, but the self-ligating bracket of the above embodiment may also be used alone (i.e. a single-wing bracket), i.e. a self-ligating bracket fixed to a tooth for fixing an orthodontic archwire, and one of the above single-wing or double-wing distance adjustable brackets may be selected for straightening according to actual needs.

In addition, it should be understood that the "wings" of the "double-wing spacing adjustable bracket" of the present invention have been replaced by "position-limiting members", and the "wings" of the present invention actually refer to a solid structure that is equivalent in mechanical properties to the "wings" of the ligating-type orthodontic appliance, but does not have the "wings"; the present invention is intended to indicate that the spacing between the "wings" is adjustable, and the use of the term "wings" is more readily understood and described by those skilled in the art.

According to the bracket with the adjustable distance between the two wings, the size of the critical clearance angle between the bracket groove and the arch wire in the labial-lingual direction and the gingival direction can be adjusted, so that the friction force and the twisting force can be correspondingly adjusted, the frequency of the return visit is reduced, and the correction efficiency is improved.

The present invention also provides an appliance comprising: the orthodontic wire sequentially passes through the interiors of adjacent bracket bodies 3.

Specifically, the dental appliance of the present embodiment has two arrangements:

generally, a double-wing interval adjustable bracket structure is adopted, two self-ligating brackets are fixed on each tooth, an orthodontic arch wire passes through the adjacent bracket bodies 3, and the clearance angle is adjusted by utilizing a limiting part 4. If the limiting component 4 of one of the bracket structures with adjustable distance between double wings is fixedly arranged, the bracket structure can also be called a single-wing bracket structure. Wherein, the clearance angle adjusting range of the bracket structure with the adjustable distance between the double wings is more accurate, and the correction arch wire is more stable to fix.

In addition, a single-wing bracket structure can be adopted according to the actual situation of a patient, a self-ligating bracket is fixed on each tooth, an orthodontic arch wire penetrates through the adjacent bracket bodies 3, and the clearance angle is adjusted by utilizing the limiting part 4. When the bracket is designed into a single-wing bracket, the inner diameter of the proximal end is changed into a rectangular groove which is the same as the inner diameter of the distal end, and the single-side bracket is suitable for narrow lower incisors. The correcting arch wire can adopt round wire or square wire, nickel-titanium wire or stainless steel wire according to different correcting stages.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.