CN114469401A

CN114469401A - Active self-ligating bracket and orthodontic system

Info

Publication number: CN114469401A
Application number: CN202210061863.4A
Authority: CN
Inventors: 陶刚强; 王犇; 陶明华
Original assignee: Hangzhou Youyi Shuchi Technology Co ltd
Current assignee: Hangzhou Youyi Shuchi Technology Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-05-13

Abstract

The application discloses initiative self-ligating bracket and orthodontic system, one of them initiative self-ligating bracket includes: a net bottom; a bracket body; a cover flap movably coupled to the first side and having an open position opening the restraint slot and a corresponding closed position; the elastic piece is arranged on the cover plate and moves along with the cover plate; the cover plate is in a closed position, and at least one part of the elastic piece extends into the restraint groove. The technical scheme disclosed in the application optimizes the structure of the bracket body, the cover plate and the elastic piece, realizes the integral structure which is easy to produce and assemble and has good active self-locking effect on the arch wire on the bracket with millimeter-sized dimension, overcomes the technical problem which always puzzles the technical personnel in the field, and has extremely high popularization value.

Description

Active self-ligating bracket and orthodontic system

Technical Field

The present application relates to the field of dental orthodontics, and more particularly to active self-ligating brackets and orthodontic systems.

Background

In the process of orthodontic treatment of teeth, orthodontic brackets are fixed on the surfaces of teeth, an arch wire penetrates through an arch wire groove on each bracket, the arch wire is directly ligated into the arch wire groove of each bracket through ligating rubber rings or ligating wire steel wires, and the straightening force of the arch wire is transmitted to the teeth through the brackets, so that the teeth generate expected movement, and the purpose of straightening the teeth is achieved.

Self-ligating brackets may generally be classified into two broad categories, passive and active. The locking plate of the passive self-locking bracket and the arch wire do not form restraint, so that the arch wire can slide in the arch wire groove to control the movement of teeth, the low-friction environment created in the early stage of correction is provided, and the alignment and the tooth arrangement are facilitated. The active self-ligating bracket uses an elastic movable part to embed the arch wire into the bracket groove, and the elastic part and the arch wire form restraint, and the elastic part can also store and gradually release energy, transmit continuous light force to the tooth and the supporting structure, and generate accurate and controllable movement, thereby effectively controlling the torque expression of the tooth in the groove.

For example, chinese patent publication No. CN209187014U discloses an active self-ligating bracket, which includes a bracket body, wherein the bracket body is provided with a groove, and a first ligating wing and a second ligating wing are formed on two sides of the groove; the bracket body is provided with a fixed plate, and the fixed plate comprises a movable plate and a pressing plate; the moving plate is in sliding fit along a sliding channel arranged on the bracket body. According to the technical scheme, the arch wire is actively self-locked through the C-shaped elastic component, but the larger elastic component means a larger deformation stroke, so that the restraint capability of the arch wire is reduced; meanwhile, the elastic component wound around the bracket periphery easily causes foreign body sensation, and further, the working efficiency of the elastic component can be reduced under severe working conditions such as foreign bodies in the oral cavity, dental calculus and the like.

In order to overcome the above problems, the art has also tried to provide an elastic member in the groove. For example, chinese patent publication No. CN208048816U discloses a self-ligating bracket with a spring slot bottom, which comprises: bracket base, bracket body and have the archwire groove of spring tank bottom. Wherein, the bottom of the bracket base is provided with an arc bottom net, and the central part of the bracket body is provided with an arch wire groove at the bottom of the spring groove through which an orthodontic arch wire penetrates. Two pairs of symmetrical ligating wings are respectively arranged on two sides of the longitudinal groove of the supporting groove body, a limiting lock catch groove and a sliding lock plate are arranged in each ligating wing, and a protrusion is arranged in each limiting lock catch groove and used for fixing the sliding lock plate. The technical scheme meets the principle of mechanical design but ignores the structural size of the bracket. The size of the bracket is generally millimeter in order to reduce the foreign body sensation, and the machining precision and the assembly difficulty of structures such as the bottom of the spring groove on the size dimension pose very high challenges and are difficult to popularize industrially and commercially.

The inventors have found that it is a problem addressed by many skilled in the art to achieve, under existing materials and processing conditions, a monolithic structure on a millimeter-sized bracket that is easy to produce and assemble and that has good positive self-locking effect for archwires.

Disclosure of Invention

In order to solve the above technical problem, the present application discloses an active self-ligating bracket, comprising:

the net bottom is used for being adhered to the tooth surface at the corresponding position;

the bracket body is connected with the net bottom, a restraining groove for the penetration of an arch wire is formed in the bracket body, and the restraining groove is formed in a first side face of the bracket body;

a cover flap movably coupled to the first side and having an open position opening the restraint slot and a corresponding closed position;

the elastic piece is arranged on the cover plate and moves along with the cover plate; the cover plate is in a closed position, and at least one part of the elastic piece extends into the restraint groove.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the elastic member includes:

the connecting part is connected with the cover plate and moves along with the cover plate;

and the working part is connected with the connecting part and extends into the restraint groove.

Optionally, the working portion is an end portion proximate to the mesh bottom for interacting with an archwire.

Optionally, a working window is arranged on one side, facing the net bottom, of the cover plate; the working portion extends into the confinement groove via the working window.

Optionally, the working portion is integrally U-shaped or W-shaped, two ends of an opening of the U-shaped or W-shaped are respectively a first positioning end connected with the connecting portion and a second positioning end matched with the cover plate, the bottom of the U-shaped or W-shaped can interact with the arch wire, and the working portion can switch the relative distance between the bottom of the U-shaped or W-shaped relative to the bottom of the restraining groove through self-deformation.

Optionally, a constraint cavity is formed in the cover plate, and the second positioning end is contained in the constraint cavity.

The application also discloses initiative self-ligating bracket, include:

the elastic piece is arranged on the cover plate and moves along with the cover plate;

at least a portion of the resilient member is adapted to interact with the archwire at least at two locations in the direction of movement of the cover plate.

Optionally, the elastic member includes:

a working part connected with the connecting part and providing the action part.

Optionally, the contact between the activation site and the archwire is at least in the form of a line contact.

Optionally, the action sites include at least on opposite lateral edges of the archwire in the direction of movement of the cover plate.

Optionally, the cross-sectional shape of the working portion is W-shaped or U-shaped, wherein the bottom of the W-shape or U-shape forms the action site.

The application also discloses initiative self-ligating bracket, include:

the bracket body is connected with the net bottom, a positioning groove and a restraining groove for the arch wire to penetrate through are formed in the bracket body, and the restraining groove is formed in a first side face of the bracket body;

at least a portion of the resilient member is adapted to interact with the archwire with an action site extending in an axial direction of the constricting slot.

Optionally, the elastic member includes:

The application also discloses initiative self-ligating bracket, include:

a cover flap rotationally coupled to the first side and having an open position opening the restraint slot and a corresponding closed position;

an elastic member, the elastic member comprising:

the working part is connected with the connecting part and can interact with the arch wire, and the working part has an avoidance state accommodated in the cover plate and a working state stretching out of the cover plate; the cover plate is positioned under the opening position, and the working part is in a working state.

Optionally, the side of the cover plate facing the net bottom retracts inwards to form a release space, the cover plate is located at the opening position, the bracket body closes the release space, and the cover plate is located at the closing position, and the release space is communicated with the constraint groove.

Optionally, the cover plate is in a closed position, and the working portion extends out of the release space and enters the restriction groove when in a working state.

Optionally, the bracket body is provided with a positioning groove, the cover plate is located at the opening position, and the working part extends out of the release space and enters the positioning groove when in the working state.

The application also discloses initiative self-ligating bracket, include:

an elastic member, the elastic member comprising:

the working part is integrally U-shaped or W-shaped, two ends of the U-shaped or W-shaped are respectively matched with the connecting part and the cover plate, the bottom of the U-shaped or W-shaped can interact with the arch wire, and the working part can switch the relative distance between the bottom of the U-shaped or W-shaped and the bottom of the restraining groove through self deformation.

Optionally, the two ends of the opening of the U-shape or the W-shape are respectively a first positioning end connected with the connecting portion and a second positioning end matched with the cover plate, the cover plate is provided with a constraint cavity, and the second positioning end is contained in the constraint cavity.

Optionally, the cover plate is retracted inward toward the side of the net bottom to form a release space, the bracket body closes the release space when the cover plate is in the open position, the release space is communicated with the constraint groove when the cover plate is in the closed position, and the working portion extends into the constraint groove through the release space.

The application also discloses initiative self-ligating bracket, include:

a cover flap movably fitted to the first side face and having an open position opening the restriction slot and a corresponding closed position;

the elastic piece is arranged on the cover plate and moves along with the cover plate; the elastic piece has a self-locking state that the arch wire is pressed to deform towards the cover plate and a free state that the arch wire is far away from the cover plate.

Optionally, the cover plate is retracted inwards towards the side of the net bottom to form a release space, and at least a part of the elastic member in the self-locking state is retracted into the release space.

Optionally, the elastic member includes:

and the working part is connected with the connecting part and deforms to realize the free state and the self-locking state.

Optionally, the cover plate is located at the open position, the bracket body closes the release space, the cover plate is located at the closed position, the release space is communicated with the constraint groove, and the working portion extends into the constraint groove through the release space.

The application also discloses initiative self-ligating bracket, include:

the cover plate is movably matched with the first side surface and is provided with an opening position for opening the restraint groove and a corresponding closing position, and one side of the cover plate facing the net bottom is provided with a working window;

the elastic piece is arranged on the cover plate;

the cover plate is in a closed position, and the elastic piece extends into the restraint groove through the working window.

Optionally, the elastic member includes:

the working part is connected with the connecting part and is U-shaped or W-shaped, two ends of an opening of the U-shaped or W-shaped are respectively provided with a first positioning end connected with the connecting part and a second positioning end matched with the cover plate, and the first positioning end passes through the working window and the connecting part are connected.

Optionally, a constraint cavity is formed in the cover plate, the constraint cavity and the working window are independently arranged, and the second positioning end is contained in the constraint cavity.

The application also discloses move self-ligating bracket, include:

the cover plate is in a closed position, and at least one part of the elastic piece extends into the restriction groove; the cover plate is located at the opening position, and at least one part of the elastic piece extends into the positioning groove.

Optionally, the shape of the positioning slot is complementary to the shape of the corresponding portion of the resilient member.

Optionally, the elastic member includes:

and the working part is connected with the connecting part and is used for extending into the restraining groove or the positioning groove, and the shape of the positioning groove is complementary with that of the working part.

Optionally, a blocking portion is disposed between the constraining groove and the positioning groove, when the cover plate is in the opening position, the side edge of the working portion close to the constraining groove abuts against the blocking portion, and when the cover plate is in the closing position, the side edge of the working portion close to the positioning groove abuts against the blocking portion.

Optionally, the working part has an avoiding state accommodated in the cover plate and a working state extending out of the cover plate; the blocking part is arranged in a circular arc and can drive the working part to enter the avoiding state.

Optionally, the side of the cover plate facing the net bottom is retracted inwards to form a release space, and at least a part of the elastic member in the avoiding state is retracted into the release space.

The application also discloses initiative self-ligating bracket, include:

a cover sheet comprising

The sliding seat is movably matched with the first side surface, and the top surface of the sliding seat is hollow to form an assembly cavity;

a closing plate installed on the sliding seat and closing the assembly chamber;

and the elastic piece moves along with the cover plate, one end of the elastic piece is arranged in the assembly cavity, and the other end of the elastic piece extends out from the sliding seat towards the side surface of the net bottom and can interact with the arch wire.

Optionally, the elastic member includes:

the connecting part is fixedly connected in the assembly cavity or clamped in the assembly cavity by the sliding seat and the closing plate;

and the working part is connected with the connecting part and extends out from the side face of the sliding seat facing the net bottom.

Optionally, an adaptive window is formed in one side, facing the net bottom, of the sliding seat, and the working portion extends out of the net bottom through the adaptive window.

Optionally, the size of the opening of the adapting window matches the size of the working portion.

Optionally, the side of the sealing plate facing the mesh bottom is provided with an adapting projection, and the adapting projection divides the adapting window into a working window and a constraining cavity.

Optionally, the working portion is U-shaped or W-shaped, two ends of an opening of the U-shaped or W-shaped are respectively a first positioning end connected with the connecting portion and a second positioning end matched with the cover plate, the first positioning end is connected with the connecting portion through the working window, and the second positioning end is accommodated in the constraining cavity.

Optionally, the second positioning end is inserted into the constraint cavity or clamped by the sliding seat and the closing plate in the constraint cavity.

Optionally, the side of the closing plate facing away from the net bottom and the side of the sliding seat facing away from the net bottom are in smooth transition, and are in sealing connection.

Optionally, the sliding seat is provided with sliding blocks on two sides, the bracket body is provided with a slideway corresponding to the sliding block, and the assembly cavity is arranged between the two sliding blocks.

The application also discloses an orthodontic correction system, which comprises a plurality of active self-locking brackets and the arch wire in the technical scheme, wherein the arch wire is used for sequentially penetrating through the constraint grooves of the active self-locking brackets.

The technical scheme disclosed in the application optimizes the structure of the bracket body, the cover plate and the elastic piece, realizes the integral structure which is easy to produce and assemble and has good active self-locking effect on the arch wire on the bracket with millimeter-sized dimension, overcomes the technical problem which always puzzles the technical personnel in the field, and has extremely high popularization value.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

FIGS. 1-2 are schematic views of a prior art self-ligating bracket arrangement and possible problems, respectively;

figures 3 to 4 are schematic views of different views of a prior art solution for overcoming the technical problem shown in figures 1 and 2, respectively;

FIG. 5 is a schematic view of an active self-ligating bracket of the first embodiment;

FIG. 6 is a schematic illustration of the active ligating bracket of FIG. 5 shown uncapped;

FIG. 7 is a schematic view of the cover plate and bracket body of the active self-ligating bracket of FIG. 5 in combination;

FIG. 8 is a schematic view of the active self-ligating bracket cover plate assembly of FIG. 5;

FIG. 9 is a schematic cross-sectional view of the cover plate and the elastic member shown in FIG. 8;

FIG. 10 is a cross-sectional view of the active self-ligating bracket of FIG. 5;

FIG. 11 is a free state view of the active self-ligating bracket of FIG. 5;

FIG. 12 is a cross-sectional view of the active self-ligating bracket of FIG. 11;

FIG. 13 is a schematic view of the active self-ligating bracket of FIG. 5 engaged with a smaller sized circular archwire;

FIG. 14 is a schematic view of the active self-ligating bracket of FIG. 13 from a different perspective;

FIG. 15 is a cross-sectional view of the active self-ligating bracket of FIG. 13;

FIG. 16 is a schematic view of the active self-ligating bracket of FIG. 5 engaged with a medium-sized square archwire;

FIG. 17 is a schematic view of the active self-ligating bracket of FIG. 16 from a different perspective;

FIG. 18 is a cross-sectional view of the active self-ligating bracket of FIG. 16;

FIG. 19 is an enlarged partial view of the working portion of the resilient member of FIG. 18;

FIG. 20 is a schematic view of the active self-ligating bracket of FIG. 5 engaged with a larger sized square archwire;

FIG. 21 is a schematic view of the active self-ligating bracket of FIG. 20 from a different perspective;

FIG. 22 is a cross-sectional view of the active self-ligating bracket of FIG. 20;

FIG. 23 is an enlarged partial view of the working portion of the resilient member of FIG. 22;

FIG. 24 is a schematic view of the cover plate of the active self-ligating bracket of FIG. 5 in an open position;

FIG. 25 is a cross-sectional view of the active self-ligating bracket of FIG. 24;

FIG. 26 is a schematic view of an active self-ligating bracket of the second embodiment;

FIG. 27 is a schematic view of the cover plate and bracket body of the active self-ligating bracket of FIG. 26;

FIG. 28 is a schematic view of the active self-ligating bracket cover plate assembly of FIG. 27;

FIG. 29 is a cross-sectional view of the flap and elastic member of FIG. 28;

FIG. 30 is a cross-sectional view of the flap and elastic member of FIG. 29 from another perspective;

FIG. 31 is a schematic view of the cover plate and the resilient member of FIG. 30 in assembled relation;

FIG. 32 is a schematic view of the active self-ligating bracket of FIG. 26 in mated relationship with an archwire;

FIG. 33 is a cross-sectional view of the active self-ligating bracket of FIG. 32;

FIG. 34 is a schematic view of an active self-ligating bracket of the third embodiment;

FIG. 35 is a schematic view of the cover plate and bracket body of the active self-ligating bracket of FIG. 34;

FIG. 36 is a cross-sectional view of the flap and elastic member of FIG. 35;

FIG. 37 is an assembled view of the active self-ligating bracket cover plate of FIG. 36, shown in cross-section;

FIG. 38 is a schematic view of the assembly of the active self-ligating bracket cover plate of FIG. 36;

FIG. 39 is a cross-sectional view of the flap and elastic member of FIG. 36 assembled from another perspective;

FIG. 40 is a schematic view of the active self-ligating bracket of FIG. 36 in mated relationship with an archwire;

FIG. 41 is a cross-sectional view of the active self-ligating bracket of FIG. 41.

The reference numerals in the figures are illustrated as follows:

1. a net bottom;

2. a bracket body; 21. a confinement groove; 22. a first side surface; 23. positioning a groove; 24. a blocking portion; 25. a slideway;

3. an arch wire;

4. a cover sheet; 41. a sliding seat; 411. adapting a window; 412. a working window; 413. a constraining cavity; 414. releasing the space; 415. an assembly chamber; 416. a slider; 42. a closing plate; 421. fitting the bump;

5. an elastic member; 51. a connecting portion; 52. a working part; 521. a first positioning end; 522. a second positioning end; 53. the site of action;

61. a dashed line position; 62. the dashed line position.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, a prior art bracket structure is shown. With the advance of the correction process, the space posture of the teeth is adjusted under the action of the arch wire 3, so that the situation as shown in the attached drawing 2 can occur, the situation that the arch wire 3 and the groove bottom of the constraint groove cannot be completely attached to each other can occur, and the expression of the preset correction data of the bracket is influenced. In the prior art, the conventional means of overcoming the problem is to achieve a stable connection between the archwire 3 and the bracket by means of ligatures, as shown in fig. 3 and 4, for example. Or in the form of a C-shaped spring as mentioned in the background. Whether the ligature wire or the C-shaped elastic member mentioned above, there are the following problems:

1. the development of the bracket structure is limited, the ligation wings corresponding to the ligation wires are easily expanded in space to cause foreign body sensation, and the C-shaped elastic piece is similar to the C-shaped elastic piece;

2. gaps among the ligation structure, the C-shaped elastic piece and the bracket are easily affected by foreign matters and dental calculus in the oral cavity, and the development of an orthodontic process can be seriously affected;

3. the setting of ligature silk, the adjustment of C shape elastic component and the observation in later stage need medical personnel to realize the operation, have increased the number of times of double-diagnosis when having increased chair limit operating time, have brought the influence to patient's work life when having improved medical personnel working strength.

Referring to the embodiments shown in FIGS. 5-41, the present application discloses an active self-ligating bracket comprising:

the net bottom 1 is used for being adhered to the surface of the tooth at the corresponding position;

the bracket body 2 is connected with the net bottom 1, a restraining groove 21 for the arch wire 3 to penetrate through is formed in the bracket body 2, and the restraining groove 21 is opened on a first side surface 22 of the bracket body 2;

a cover flap 4 movably fitted to the first side 22 and having an open position (refer to fig. 6) and a corresponding closed position (refer to fig. 5) in which the restriction groove 21 is opened;

the elastic piece 5 is arranged on the cover plate 4 and moves along with the cover plate 4; the cover flap 4 is in the closed position with at least a portion of the resilient member 5 extending into the restraint slot 21.

Compared with the arrangement that the C-shaped elastic piece 5 extends to the outside of the bracket body 2 in the prior art, the elastic piece 5 moves along with the cover plate 4 in the embodiment, so that the volume of the elastic piece 5 can be effectively controlled, and the foreign body sensation is reduced; and the movement of the cover plate 4 and the movement process of the elastic piece 5 are synchronized at the same time, so that the time of the chair-side operation is reduced.

In a specific arrangement of the elastic member 5, referring to fig. 8 to 12, 30 to 33, and 38 to 41, the elastic member 5 includes:

a connecting part 51 connected with the cover sheet 4 and moving with the cover sheet 4;

and a working portion 52 connected to the connection portion 51 and extending into the restraint groove 21. Further, the working portion 52 is an end portion near the mesh bottom 1 for interacting with the archwire 3. One side of the cover plate 4 facing the net bottom 1 is provided with a working window 412; the working portion 52 extends into the confinement groove 21 via the working window 412. In the drawings, the working part 52 is generally U-shaped (see fig. 36) or W-shaped (see fig. 8), the two open ends of the U-shape or W-shape are respectively a first positioning end 521 connected with the connecting part 51 and a second positioning end 522 matched with the cover plate 4, as shown in fig. 23, the bottom of the U-shape or W-shape can interact with the arch wire 3, and the working part 52 can switch the relative distance of the bottom of the U-shape or W-shape relative to the bottom of the restraining groove 21 through self-deformation. The cover plate 4 is provided with a constraint cavity 413, and the second positioning end 522 is accommodated in the constraint cavity 413.

Referring to the embodiments shown in fig. 5-41, the present application further discloses an active self-ligating bracket comprising:

a cover flap 4 movably fitted to the first side 22 and having an open position and a corresponding closed position opening the restriction slot 21;

the elastic piece 5 is arranged on the cover plate 4 and moves along with the cover plate 4;

at least a portion of the resilient member 5 is adapted to interact with the archwire 3, and the reaction site 53 is included at least at two locations in the direction of movement of the cover plate 4 (i.e., left and right in fig. 12).

As can be seen from fig. 2, the tendency of the arch wire 3 to move in a twisting manner relative to the bracket body 2 may result in the bottom surface of the arch wire 3 becoming detached or partially detached from the bottom of the restraint slot 21. In this embodiment, this is avoided by the provision of the resilient member 5 and the action site 53 of the archwire 3.

In a specific implementation manner, referring to fig. 8 to 12, 30 to 33, and 38 to 41, the elastic member 5 includes:

and a working portion 52 connected to the connecting portion 51 and providing an action portion 53. Further, the contact between the application point 53 and the archwire 3 is at least a line contact, which in practical products, and therefore the product machining precision and the reason for the deformation of the elastic element 5, may to some extent be represented as a surface contact. In particular, in the embodiment shown in fig. 34 to 41, the contact between the activation site 53 and the archwire 3 is in the form of a face contact. The application points 53 are included at least on the opposite lateral edges of the archwire 3 in the direction of movement of the cover plate 4. The cross-sectional shape of the working portion 52 is W-shaped or U-shaped, wherein the bottom of the W-shape or U-shape forms the action portion 53.

the bracket body 2 is connected with the net bottom 1, a positioning groove 23 and a restraining groove 21 for the arch wire 3 to penetrate are formed in the bracket body 2, and the restraining groove 21 is opened on a first side surface 22 of the bracket body 2;

at least a portion of the resilient member 5 is adapted to interact with the archwire 3 with the reaction site 53 extending in the axial direction of the slot 21.

As can be seen from fig. 2, the tendency of the arch wire 3 to move in a twisting manner relative to the bracket body 2 may result in the bottom surface of the arch wire 3 becoming detached or partially detached from the bottom of the restraint slot 21. In fig. 2, a separation in the radial direction of the arch wire 3 is shown, which may occur in practice in the axial direction of the arch wire 3. In this embodiment, this is avoided by the provision of the resilient member 5 and the action site 53 of the archwire 3.

a connection part 51 connected with the cover sheet 4 and moving along with the cover sheet 4;

and a working portion 52 connected to the connecting portion 51 and providing an action portion 53. Further, the contact between the application point 53 and the archwire 3 is at least a line contact, which in practical products, and therefore the product machining precision and the reason for the deformation of the elastic element 5, may to some extent be represented as a surface contact. In particular, in the embodiment shown in fig. 34 to 41, the contact between the activation site 53 and the archwire 3 is in the form of a face contact. The cross-sectional shape of the working portion 52 is W-shaped or U-shaped, wherein the bottom of the W-shape or U-shape forms the action portion 53.

a cover flap 4 which is rotatably fitted to the first side surface 22 and has an open position and a corresponding closed position in which the restriction groove 21 is opened;

elastic member 5, elastic member 5 includes:

a working part 52 connected to the connection part 51 and capable of interacting with the arch wire 3, the working part 52 having an avoidance state accommodated in the cover plate 4 and a working state protruding out of the cover plate 4; the cover plate 4 is in the open position and the working portion 52 is in the working state.

In the embodiment, the arch wire 3 is restrained by the elastic piece 5 which can switch states relative to the cover plate 4, so that the dilemma between the restraint of the arch wire 3 and the difficulty of production and assembly in the prior art is overcome. Compared with the externally arranged C-shaped elastic member, the elastic member 5 of the present embodiment can effectively avoid the technical problems in the prior art.

In a specific implementation manner, referring to fig. 8 to 12, 30 to 33, and 38 to 41, the cover sheet 4 is retracted inward toward the side of the net bottom 1 to form a release space 414, the cover sheet 4 is in an open position, the bracket body 2 closes the release space 414 (depending on different sizes and matching of the cover sheet 4 and the bracket body 2, the bracket body 2 may not completely close the release space 114, for example, in fig. 23, the release space 414 on the right side of the cover sheet 4 is exposed to the outside), and the cover sheet 4 is in a closed position, and the release space 414 is communicated with the restriction groove 21. The cover plate 4 is in the closed position, and the working portion 52 is in the working state and protrudes out of the release space 414 into the restraint groove 21. The bracket body 2 is provided with a positioning groove 23, the cover plate 4 is at the opening position, and the working part 52 extends out of the release space 414 to enter the positioning groove 23 when in the working state.

elastic member 5, elastic member 5 includes:

the working part 52 is U-shaped or W-shaped as a whole, two ends of the U-shaped or W-shaped are respectively matched with the connecting part 51 and the cover plate 4, the bottom of the U-shaped or W-shaped can interact with the arch wire 3, and the working part 52 can switch the relative distance between the bottom of the U-shaped or W-shaped relative to the bottom of the restraint slot 21 through self deformation.

The working part 52 can adapt to the sizes of the arch wires 3 with different sizes through self deformation, thereby having self-adaptability to different treatment processes, effectively reducing the times of repeated diagnosis and reducing the burden of medical staff on the premise of ensuring the treatment effect.

In a specific implementation manner, referring to fig. 8 to 12, 30 to 33, and 38 to 41, two ends of the U-shaped or W-shaped opening are respectively a first positioning end 521 connected to the connecting portion 51 and a second positioning end 522 engaged with the cover plate 4, the cover plate 4 is provided with a constraining cavity 413, and the second positioning end 522 is accommodated in the constraining cavity 413. One side of the cover plate 4 facing the net bottom 1 is provided with a working window 412; the working portion 52 extends into the confinement groove 21 via the working window 412. The side of the cover sheet 4 facing the net bottom 1 is retracted inward to form a relief space 414, the cover sheet 4 is in an open position, the bracket body 2 closes the relief space 414 (depending on the size and matching of the cover sheet 4 and the bracket body 2, the bracket body 2 may not completely close the relief space 114, for example, in fig. 23, the relief space 414 on the right side of the cover sheet 4 is exposed to the outside), the cover sheet 4 is in a closed position, the relief space 414 is communicated with the restraint groove 21, and the working part 52 extends into the restraint groove 21 through the relief space 414.

the elastic piece 5 is arranged on the cover plate 4 and moves along with the cover plate 4; the elastic piece 5 has a self-locking state pressed by the arch wire 3 and deformed towards the cover plate 4 and a free state far away from the cover plate 4.

The elastic piece 5 under the self-locking state can keep the continuous fastening effect on the arch wire 3, so that the bonding state of the arch wire 3 and the restraint groove 21 is kept, and the expression of the preset correction data of the bracket is realized.

In a specific implementation manner, referring to fig. 8 to 12, 30 to 33 and 38 to 41, the cover plate 4 is retracted inwards towards the side of the net bottom 1 to form a release space 414, and the elastic member 5 in the self-locking state is at least partially retracted into the release space 414. The elastic member 5 includes:

and a working part 52 connected with the connection part 51 and deformed by itself to realize a free state and a self-locking state. When the cover sheet 4 is in the open position, the bracket body 2 closes the release space 414 (depending on the size and the matching of the cover sheet 4 and the bracket body 2, the bracket body 2 may not completely close the release space 114, for example, in fig. 23, the release space 414 on the right side of the cover sheet 4 is exposed to the outside), when the cover sheet 4 is in the closed position, the release space 414 is communicated with the restriction groove 21, and the working part 52 extends into the restriction groove 21 through the release space 414.

the cover plate 4 is movably matched with the first side surface 22 and is provided with an opening position and a corresponding closing position of the opening restriction groove 21, and one side of the cover plate 4 facing the net bottom 1 is provided with a working window 412;

an elastic member 5 mounted on the cover 4;

the cover plate 4 is in the closed position and the resilient member 5 extends into the restraint slot 21 through the working window 412.

The elastic member 5 extending into the restriction groove 21 through the working window 412 means that the elastic member 5 penetrates at least a portion of the cover sheet 4, and this arrangement can effectively improve the connection strength between the cover sheet 4 and the elastic member 5, and synchronize the movement of the elastic member 5 during the movement of the cover sheet 4.

the working part 52 is connected with the connecting part 51 and is U-shaped or W-shaped, two ends of an opening of the U-shaped or W-shaped are respectively a first positioning end 521 connected with the connecting part 51 and a second positioning end 522 matched with the cover plate 4, and the first positioning end 521 is connected with the connecting part 51 through the working window 412. The cover plate 4 is provided with a constraint cavity 413, the constraint cavity 413 and the working window 412 are independently arranged, and the second positioning end 522 is accommodated in the constraint cavity 413.

Referring to the embodiments shown in fig. 5-41, the present application further discloses a dynamic self-ligating bracket, comprising:

when the cover plate 4 is in a closed position, at least one part of the elastic piece 5 extends into the restriction groove 21; the cover plate 4 is in the open position, and at least a part of the elastic member 5 extends into the positioning groove 23.

The different states of the cover sheet 4 also require a positioning effect in order to maintain the cover sheet 4 in the corresponding state. The elastic piece 5 in the embodiment can be used for realizing the restraint of the arch wire 3 and the restraint of the cover plate 4, thereby realizing the combination of functions on the premise of controlling the volume of the whole structure, effectively improving the utilization rate of components and reducing the difficulty of production and assembly.

In a specific implementation, referring to fig. 8 to 12, 30 to 33 and 38 to 41, the shape of the positioning slot 23 is complementary to the shape of the corresponding portion of the elastic member 5. The elastic member 5 includes:

and a working portion 52 connected to the connecting portion 51 and adapted to extend into the restraint slot 21 or the positioning slot 23, the positioning slot 23 having a shape complementary to the shape of the working portion 52. A blocking part 24 is arranged between the restraint groove 21 and the positioning groove 23, when the cover plate 4 is in the opening position, the side edge of the working part 52 close to the restraint groove 21 is abutted against the blocking part 24, and when the cover plate 4 is in the closing position, the side edge of the working part 52 close to the positioning groove 23 is abutted against the blocking part 24. The working part 52 has an avoiding state accommodated in the cover 4 and a working state of protruding out the cover 4; the blocking portion 24 is provided in an arc and can drive the working portion 52 into the retracted state. The side of the cover sheet 4 facing the net bottom 1 is retracted inwardly to form a release space 414, and the elastic member 5 in the retracted state is at least partially retracted into the release space 414.

the bracket body 2 is connected with the net bottom 1, a positioning groove 23 and a restraining groove 21 for the arch wire 3 to penetrate through are formed in the bracket body 2, and the restraining groove 21 is opened on a first side surface 22 of the bracket body 2;

cover sheet 4, comprising

A sliding seat 41 movably fitted to the first side surface 22 and having a hollow top surface forming a fitting cavity 415;

a closing plate 42 mounted on the sliding seat 41 and closing the fitting chamber 415;

and the elastic piece 5 moves along with the cover plate 4, one end of the elastic piece 5 is arranged in the assembly cavity 415, and the other end of the elastic piece 5 protrudes from the sliding seat 41 towards the side surface of the net bottom 1 and can interact with the arch wire 3.

The mounting of the spring element 5 in the cover plate is achieved by a structural optimization of the cover plate 4. The pre-assembly between the cover plate 4 and the elastic piece 5 can improve the production and assembly efficiency, and the cover plate 4 and the elastic piece 5 can be assembled on the bracket body 2 in stages to reduce the assembly difficulty. The cover plate 4 can also provide a stable installation base for the elastic part 5, thereby improving the stable shape of the movement of the elastic part 5 and further improving the working effect of the active self-ligating bracket.

the connecting part 51 is fixedly connected in the assembly cavity 415 or clamped in the assembly cavity 415 by the sliding seat 41 and the closing plate 42;

and an operating part 52 connected to the connecting part 51 and protruding from the slide base 41 toward the side surface of the net bottom 1. The sliding seat 41 has an adaptive window 411 on one side facing the net bottom 1, and the working portion 52 protrudes through the adaptive window 411 toward the net bottom 1. The opening size of the fitting window 411 matches the size of the working portion 52. The side of the closing plate 42 facing the mesh bottom 1 is provided with an adapting projection 421, and the adapting projection 421 divides the adapting window 411 into a working window 412 and a restricting cavity 413. The working portion 52 is U-shaped or W-shaped, two ends of an opening of the U-shaped or W-shaped are respectively a first positioning end 521 connected with the connecting portion 51 and a second positioning end 522 matched with the cover plate 4, the first positioning end 521 is connected with the connecting portion 51 through the working window 412, and the second positioning end 522 is accommodated in the constraint cavity 413. The second positioning end 522 is inserted into the constraining chamber 413 or clamped in the constraining chamber 413 by the sliding seat 41 and the closing plate 42. The side of the closing plate 42 facing away from the net bottom 1 and the side of the sliding seat 41 facing away from the net bottom 1 are smoothly transited and are in sealed connection. The sliding block 416 is arranged on two sides of the sliding seat 41, the slideway 25 corresponding to the sliding block 416 is arranged on the bracket body 2, and the assembly cavity 415 is arranged between the two sliding blocks 416.

In combination with the above description, it is understood that the present application also discloses an orthodontic correction system, which includes a plurality of active self-ligating brackets and an archwire 3 in the above technical solutions, wherein the archwire 3 is used for sequentially penetrating through the restraining slots 21 of the active self-ligating brackets.

It should be noted that the active self-ligating brackets mentioned above are summarized based on the embodiments shown in fig. 5 to 41, and it should be understood that the summary in different technical views is based on the concept of the invention of implementing active self-ligating of the archwire 3 and the restraining slot 21 by providing a resilient member 5 on the cover plate 4. The features of the active self-ligating brackets referred to above can therefore be combined with one another without significant conflict, and the synergy of the features with one another will be explained below in connection with specific embodiments.

Referring to the first embodiment shown in fig. 5 to 12, the cover sheet 4 is slidably fitted to the holder body 2 by the sliders 416 at both sides of the sliding seat 41. The sliding seat 41 of the cover plate 4, the elastic element 5 and the closing plate 42 of the cover plate 4 are of a sandwich structure, and the sliding seat 41 and the closing plate 42 are buckled with each other to restrain the elastic element 5 in the assembly cavity 415. The elastic member 5 is of an integral structure and protrudes toward the net bottom 1 through the working window 412. The working portion 52 is W-shaped and the bottom is smoothly disposed and adapted to interact with the archwire 3 or the positioning slot 23. The second positioning end 522 is received in the constraining chamber 413, and in this embodiment, the second positioning end 522 is movably engaged with the constraining chamber 413, that is, the second positioning end 522 can move freely in the constraining chamber 413 to release the amount of movement of the elastic member 5 during the deformation process. The working window 412 and the confinement chamber 413 are formed by dividing the fitting window 411 by fitting projections 421 on the closing plate 42. Similarly, the fitting projection 421 is used to form a sidewall of the working window 412, which is retracted to enlarge the size of the working window 412, and to release the amount of movement of the first positioning end 521 during the deformation of the elastic member 5 to a certain extent. In the drawing, the side walls embodied as the fitting projections 421 for forming the working window 412 are disposed obliquely, the side walls are provided with bottom edges on the side passing through the bottom of the net, and top edges on the side far from the bottom of the net, and the bottom edges are far away from the top edges compared with the side edges of the sliding seat for forming the working window 412.

In fig. 24 to 25, the lid 4 is shown in the open position with the working portion 52 in the positioning slot 23, the positioning slot 23 being complementary in shape to the working portion 52. In the process of moving the cover sheet 4 from the closed position to the start position, the working portion 52 needs to pass over the stopper portion 24, and the stopper portion 24 is provided in an arc shape and can drive the working portion 52 to enter the escape state. The middle position of the W-shaped bottom of the working part 52 can also provide a weak positioning effect, thereby providing a paragraph sense for the opening effect of the cover plate 4 and providing a structural foundation for realizing other functions.

Fig. 13 to 15 show the fitting effect of the active self-ligating bracket and the circular arch wire 3 with a smaller size (for example, the diameter of the arch wire in the drawings is 0.016 inch, namely 0.4mm), in the first embodiment, because the arch wire 3 and the elastic piece 5 interact with each other due to the size, the arch wire 3 can move freely in the constraint groove 21, and rapid tooth arrangement can be realized in the early stage of correction. The resilient member 5 now only acts to restrain the relative movement of the flap 4.

In fig. 14 to 19, in order to achieve the effect of adapting the active self-ligating bracket and the intermediate-sized (e.g., 0.016 inch by 0.022 inch, i.e., 0.4mm by 0.56mm) square archwire 3 in the first embodiment, the archwire 3 having the size shown in the drawings interacts with the working portion 52 of the elastic member 5, and referring to fig. 19, the dashed line position 61 is the position where the working portion 52 is at the bottom in the free state, and it can be clearly observed that the working portion 52 deforms under the action of the archwire 3. Correspondingly, the arch wire 3 can be tightly close to the bottom of the restraint groove 21 under the elastic acting force of the working part 52, and the accurate expression of the preset correction data of the bracket is ensured, and meanwhile, the active self-locking of a certain degree is realized. As the size of the archwire 3 becomes larger (e.g., as shown in fig. 20 to 23), the amount of deformation of the working portion 52 increases, the spring force exerted on the archwire increases, and the effect of active self-locking can be further enhanced. Meanwhile, the working portion 52 is entirely in a deformed state due to the force of the archwire 3, and thus the stress required for the respective portions of the working portion 52 to continue to be deformed increases. This feature is particularly evident in the cooperation of the working portion 52 and the blocking portion 24, and the force required to drive the flap 4 from the closed position to the open position in fig. 18 is significantly greater than the force required to drive the flap 4 from the closed position to the open position in fig. 15. That is, the greater the deformation amount of the working portion 52 of the elastic member 5, the greater the opening torque of the cover plate 4, thereby ensuring the safety of the bracket in a high-stress working state and avoiding the occurrence of accidental unlocking of the cover plate 4. The same applies to fig. 22.

In fig. 20 to 23, which are the effects of the active self-ligating bracket and the larger-sized square archwire 3 (for example, the archwire size is 0.019 inches by 0.025 inches, namely 0.48mm by 0.64mm in the drawings) in the first embodiment, the archwire 3 with the size shown in the drawings can interact with the working part 52 of the elastic member 5 more strongly, and referring to fig. 23, the dashed line position 61 is the position where the working part 52 is at the bottom in the free state, and the dashed line position 62 is the position where the working part 52 is at the bottom in fig. 19, it can be clearly observed that the working part 52 is deformed more greatly under the action of the archwire 3. Accordingly, the archwire 3 will be resiliently urged against the bottom of the slot 21 at the working portion 52 to achieve further positive self-locking. It can be observed that there are variations in the form of the working portion 52, in addition to the variation in the distance of the bottom of the working portion 52 from the bottom of the constraining groove 21. Including the more gradual change of the U-shape at the bottom of the working portion 52, the change of the position of the first positioning end 521 in the working window 412, and the change of the position of the second positioning end 522 in the restriction chamber 413.

Referring to the second embodiment shown in fig. 26 to 33, the elastic member 5 is a unitary structure and the working portion 52 is W-shaped, which is the most different from the first embodiment in the way of engaging the second positioning end 522 with the cover plate 4. The second positioning end 522 and the constraining chamber 413 are freely engaged in the first embodiment, and the second positioning end 522 is clamped by the closing plate 42 and the sliding seat 41. The second positioning end 522 extends from the confinement chamber 413 to the top of the closing plate 42 and/or the sliding seat 41. The advantage of this arrangement is that the restraining effect of the second positioning end 522 can be improved, and the second positioning end 522 can be prevented from being separated from the restraining cavity 413 during the deformation of the working portion 52. Viewed from another point, the assembly of the second positioning end 522 can be synchronized with the assembly of the closing plate 42 and the sliding seat 41. For example, when the sealing plate 42 and the sliding seat 41 are welded, the second positioning end 522, the sliding seat 41 and the sealing plate 42 can be connected by one-time welding, so that the strength is improved, and the difficulty in the process and the process treatment is reduced.

Referring to the third embodiment shown in fig. 34 to 41, the biggest difference in this embodiment is that the working portion 52 of the elastic member 5 is U-shaped, and the positioning groove 23 is correspondingly modified into U-shape, compared with the first embodiment. The advantage of this setting lies in that the area of contact of work portion 52 and arch wire 3 is bigger, can be more stable exert the effort to arch wire 3 in order to realize holding in the palm groove and predetermine accurate expression and the initiative auto-lock of correcting data.

The above embodiments also have a certain commonality, for example, the working portion in the free state has a length in the constraining groove of 10% to 35% of the total depth of the constraining groove. The length of the working part in the working state in the constraint groove accounts for 2 to 20 percent of the total depth of the constraint groove. In the dimensional relationship shown in the drawings, the distance between the bottom of the working portion and the bottom of the constricting channel in the free state is 0.020 inches, i.e., 0.508 mm. I.e., wires smaller than this size are not constrained by the resilient member, wires larger than this size tend to move the resilient member into the working condition. Wherein the resilient member of the W-shaped working portion is able to further adapt to a circular arch wire by the recess of the W-shape.

The constraint groove is internally provided with an avoiding opening for working deformation, and the concrete expression is that two ends of the notch of the constraint groove retract to avoid two sides of the bottom of the working part. On the setting of specific material and processing technology, the bracket body and the cover plate can be made of stainless steel or ceramic, and the processing technologies such as powder metallurgy, CNC (computer numerical control) processing or wire cutting can be selected on the forming technology. The elastic part can be made of stainless steel or memory alloy, and the forming process can be stamping, bending, CNC (computer numerical control) or wire cutting. The cover plate and the elastic piece can be assembled in a clamping mode, a friction mode and the like in a matched size mode, a clamping mode, a limiting mode and the like in a matched structure mode, and a welding mode, an adhesion mode, a riveting mode and the like can be selected according to materials. In terms of the size of the elastic element, the whole elastic element can be made of a thin plate with the thickness of 0.05 mm to 0.2 mm. The length of the elastic member matches the cover plate in the opening and closing direction of the cover plate, and the elastic member is slightly shorter than the size of the cover plate in the drawing, namely, the length of the elastic member is 50 to 98 percent of the length of the cover plate. The length of the elastic member in the axial direction of the restriction groove matches the axial length of the restriction groove, and the elastic member is slightly shorter than the axial length of the restriction groove in the drawing, that is, the length of the elastic member is 50% to 98% of the axial length of the restriction groove.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. Active self-ligating bracket, comprising:

the elastic piece is arranged on the cover plate and moves along with the cover plate; the cover plate is in a closed position, and at least one part of the elastic piece extends into the restraining groove.

2. Active self-ligating bracket, comprising:

3. Active self-ligating bracket, comprising:

4. Active self-ligating bracket, comprising:

an elastic member, the elastic member comprising:

5. Active self-ligating bracket, comprising:

an elastic member, the elastic member comprising:

the working part is integrally U-shaped, two ends of the U-shaped are respectively matched with the connecting parts and the cover plate, the bottom of the U-shaped can interact with the arch wire, and the working part can switch the relative distance between the bottom of the U-shaped and the bottom of the restraining groove through self deformation.

6. Active self-ligating bracket, comprising:

7. Active self-ligating bracket, comprising:

the cover plate is movably matched with the first side surface and is provided with an opening position and a corresponding closing position for opening the restraining groove, and one side of the cover plate facing the net bottom is provided with a working window;

the elastic piece is arranged on the cover plate;

8. Active self-ligating bracket, comprising:

9. Active self-ligating bracket, comprising:

a cover sheet comprising

a closing plate installed on the sliding seat and closing the assembly chamber;

10. Orthodontic system, characterized in that it comprises a plurality of active self-ligating brackets according to any one of claims 1 to 9 and an archwire for passing through the constraining slots of each of said active self-ligating brackets in sequence.