CN213758651U - Vertical groove self-ligating bracket for posterior teeth - Google Patents

Abstract

The utility model relates to a perpendicular groove self-locking bracket of back tooth belongs to the orthodontic appliances field, and it is including being used for the bottom plate that bonds with the tooth face and setting up the bracket body that deviates from one side of tooth face at the bottom plate, bracket body has seted up perpendicular groove near one side at tooth top, bracket body is close to one side sliding connection at tooth top has leads to and closes perpendicular groove open-ended locking closure. This application has the effect that the doctor of being convenient for puts into the groove with the arch wire.

Description

Vertical groove self-ligating bracket for posterior teeth

Technical Field

The application relates to the field of orthodontic appliances, in particular to a vertical groove self-locking bracket for posterior teeth.

Background

The tooth has the branch of anterior tooth and posterior tooth, and anterior tooth mainly refers to the cuspid of incisor and both sides, and the molar of back tooth mainly referring to the oral cavity depths, along with orthodontic popularization and popularization, orthodontic treatment is more and more accepted by masses, and the self-locking bracket is important part among the orthodontic treatment technique of oral cavity, and the bracket divide into lip side bracket and tongue side bracket, and tongue side bracket is fixed in tooth tongue side, has overcome the outer shortcoming of lip side bracket exposure, and is stealthy not influence pleasing to the eye.

In the related technology, the self-ligating bracket comprises a bottom plate fixed on the tooth surface and a bracket body fixed on the bottom plate, wherein the bracket body is provided with a groove opening for placing an arch wire, the groove opening faces the oral cavity, the bracket body is provided with a locking cover for closing the opening, and after the arch wire is placed in the groove, the locking cover closes the groove opening, so that the probability that the arch wire is separated from the groove is reduced.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when a doctor installs the arch wire, the arch wire needs to be placed into the groove by aligning the opening of the groove from the lingual side of the teeth, and the opening is small, so that the placing difficulty is high, the doctor is inconvenient to complete the step of placing the arch wire into the groove, and the improvement space is still left.

SUMMERY OF THE UTILITY MODEL

In order to facilitate a doctor to place an arch wire into the groove, the application provides a vertical groove self-locking bracket for a posterior tooth.

The application provides a vertical groove self-ligating bracket of back tooth adopts following technical scheme:

the utility model provides a perpendicular groove self-ligating of back tooth holds in palm groove, is used for the bottom plate that bonds with the tooth face and sets up the bracket body in the one side that the bottom plate deviates from the tooth face, the bracket body has seted up perpendicular groove near one side at tooth top, one side sliding connection that the bracket body is close to the tooth top has leads to and closes perpendicular groove open-ended locking closure.

Through adopting above-mentioned technical scheme, set up perpendicular groove in one side that the bracket body is close to the tooth top for the perpendicular groove opening of bracket body is towards the tooth top, when putting into perpendicular groove with the arch wire, the available tweezers of doctor move to tooth root direction along the tooth top along the tooth face, until in the arch wire embedding groove, compare in the arch wire of correlation technique and put into the mode, this mounting means puts into the degree of difficulty less, the problem that need put into the groove from the oral cavity inside under the limited condition in the field of vision has been improved, thereby be convenient for the doctor to put into the groove with the arch wire, and then be convenient for the doctor to accomplish the step that the arch wire went into the groove.

Preferably, one side of the bracket close to the top of the tooth is provided with a dovetail block, and one side of the lock cover facing the bracket body is provided with a dovetail groove which is in clamping connection with the dovetail block to slide.

Through adopting above-mentioned technical scheme, slide the joint through dovetail and forked tail piece between locking closure and the support groove body to under the guide effect of dovetail and the restriction effect of forked tail piece, be favorable to improving the sliding stability of locking closure.

Preferably, the bracket body and the dovetail block are provided with a shaft hole in a penetrating manner, the bottom wall of the dovetail groove is provided with an arc-shaped groove, the bracket body is provided with a shaft wire clamped with the arc-shaped groove, the shaft wire penetrates through the shaft hole, and the shaft wire is fixedly connected with the shaft hole; when one end of the arc-shaped groove far away from the bottom plate slides along the locking cover to be aligned with the shaft hole, the locking cover closes the opening of the vertical groove; when one end of the arc-shaped groove close to the bottom plate slides to be aligned with the shaft hole along with the locking cover, the locking cover opens the opening of the vertical groove.

Through adopting above-mentioned technical scheme for when the vertical slot opening was sealed to the locking closure, the axle silk expansion end joint in the shaft hole was kept away from the one end of bottom plate at the arc wall. When the vertical slot opening is opened to the locking closure, the axle silk joint in the shaft hole is close to the one end of bottom plate at the arc wall, because the shaft hole is located among the arc wall both ends line, and the extension route of arc wall is skew this line, thereby in the arc wall removal in-process, the arc wall forces the axle silk to take place bending deformation, the axle silk produces the resistance to the slip of locking closure, be favorable to keeping two states when the locking closure leads to and closes vertical slot opening, when the doctor need install or adjust the arch wire, external force can be applyed in the locking closure, thereby order about the locking closure slip, and make the arc wall be close to the one end of bottom plate and just right with the shaft hole, thereby make the open state of vertical slot near the one end of bottom plate through the axle silk joint, be convenient for the doctor to install and adjust the arch wire.

Preferably, one side that the bracket body is close to the tooth top is provided with the fixing base, perpendicular slot both sides are put to fixing base and fixture block branch, one side that the fixing base deviates from the bottom plate forms the breach with one side that the bracket body is close to the tooth top, works as when the perpendicular slot opening is sealed to the locking closure, the locking closure towards the bottom plate one end with the breach gomphosis.

By adopting the technical scheme, when the locking cover is subjected to external force towards the direction of the bottom plate, the fixed seat provides pre-tightening force in the horizontal direction for the locking cover, so that the sliding distance of the locking cover is limited, and the probability that the shaft wire is broken due to the fact that the sliding distance of the locking cover is too large is favorably reduced; simultaneously with the locking closure stretches into in the breach towards the one end of bottom plate, the breach diapire provides the holding power for the locking closure tip when the locking closure receives towards perpendicular opening, is favorable to reducing the condition that the locking closure pressurized is buckled.

Preferably, one side of the fixed seat, which is far away from the bracket body, is provided with an unlocking groove, and the unlocking groove is arranged towards one side opening of the lock cover.

By adopting the technical scheme, when the locking cover needs to be opened, a doctor can stretch the probe into the unlocking groove, so that the probe is in place in the unlocking groove and props against the end part of the locking cover, the locking cover can be opened by slightly pushing the locking cover, the unlocking groove is formed, a force application point for opening the locking cover is provided for the doctor, and the doctor can conveniently open the opening of the vertical groove.

Preferably, a groove is formed in one end, facing the fixing seat, of the lock cover, and an opening of the groove is opposite to an opening, facing the lock cover, of the unlocking groove.

Through adopting above-mentioned technical scheme for the opening of unblock groove orientation locking closure is just to setting up with the recess opening, and when the locking closure supported the fixing base towards the one end of fixing base, the recess formed the space that supplies the probe to stretch into with the unblock groove jointly, thereby improved the accommodation space of unblock groove, the great probe of the diameter of being convenient for stretches into.

Preferably, the shaft hole and the dovetail block are arranged in a round shape at the edge of an opening at one end communicated with one side of the bracket body.

Through adopting above-mentioned technical scheme, shaft hole upper end opening edge radius angle sets up, provides bending deformation's space for the shaft hole for the cambered surface of laminating shaft hole upper end opening edge is crooked when axle silk deformation, and the extrusion force evenly distributed in axle silk is exerted in the arc wall on the cambered surface of shaft hole opening edge, is favorable to reducing the condition that shaft hole opening edges and corners cut off axle silk.

Preferably, the side of the base plate facing the tooth surface is provided with a reticulation.

Through adopting above-mentioned technical scheme, bond one side that has the reticulation with the bottom plate and tooth face, further strengthen this self-ligating bracket and tooth face's adhesive force, be favorable to improving self-ligating bracket's steadiness.

Preferably, one side of the lock cover, which is far away from the bracket body, is provided with an upper wing, and one side of the bracket body, which is far away from the lock cover, is provided with a lower wing.

Through adopting above-mentioned technical scheme, the upper wing and housing cap integrated into one piece, and the upper wing protrusion housing cap deviates from the support groove body setting, thereby make the upper wing, housing cap and bottom plate three form the vacancy, and lower wing, housing cap and bottom plate three form vacancy down, thereby rubber circle or ligature steel wire provide accommodation space are established for the cover to formation of upper vacancy position and lower hole site, the doctor of being convenient for ligatures the arch wire on clinical operation, the upper wing and lower wing are spacing to rubber circle or steel wire, be favorable to reducing the probability of droing of rubber circle or steel wire and increase the frictional force between arch wire and perpendicular groove.

Preferably, one side that the bracket body deviates from the locking closure is provided with the lower wing, one side that the bracket body is close to the tooth top is provided with two upper wings that are located the locking closure both sides respectively, two one side that the upper wing is close to each other all caves in and has the gliding guide way of confession locking closure both sides joint.

Through adopting above-mentioned technical scheme, upper limb and support cell body integrated into one piece, two upper limbs form with the support cell body simultaneously and supply the gliding guide way of locking closure both sides joint to be favorable to the slip of locking closure to be stable, and upper limb, locking closure and bottom plate three form the vacancy, the doctor of being convenient for carries out the ligature to the arch wire on clinical operation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the vertical groove is arranged on one side, close to the top of the tooth, of the bracket body, so that the condition that a doctor cannot observe the opening of the vertical groove under the condition that the visual field in the oral cavity is limited is improved, the doctor can conveniently place the arch wire into the groove, and the doctor can conveniently finish the step of putting the arch wire into the groove;

2. the arc-shaped groove is formed in the bottom wall of the dovetail groove, so that when the lock cover seals the opening of the vertical groove, the movable end of the shaft wire of the shaft hole is clamped at one end, far away from the bottom plate, of the arc-shaped groove to serve as a locking state of the lock cover. And the axle wire of shaft hole joint is in the arc wall and is close to the one end of bottom plate and regard as the state of unblanking of locking closure, because the shaft hole is located in the line of arc wall both ends, and the extending path of arc wall deviates from this line to when locking closure state and the state of unblanking switch, the arc wall forces the axle wire to take place bending deformation, produces the resistance to the slip of locking closure, is favorable to reducing the locking closure and receives the condition that other external force factors take place the state switch.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 2 is an exploded view of example 1 of the present application.

Fig. 3 is a schematic structural diagram of a lock cover in embodiment 1 of the present application.

Fig. 4 is an exploded view of example 1 of the present application.

Fig. 5 is a schematic view of the overall structure of embodiment 2 of the present application.

Fig. 6 is an exploded view of example 2 of the present application.

Description of reference numerals: 1. a base plate; 2. a bracket body; 21. a dovetail block; 22. a fixed seat; 221. unlocking the groove; 23. a vertical trench; 24. a lower wing; 25. a shaft hole; 3. a locking cover; 31. a dovetail groove; 32. an arc-shaped slot; 321. closing the lock position; 322. unlocking; 323. a transition section; 33. a groove; 4. an upper wing; 5. axial filament; 6. a notch; 7. a guide groove; 8. an upper vacant position; 9. a lower vacant site.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

Example 1

Referring to fig. 1, the vertical groove self-ligating bracket for posterior teeth comprises a base plate 1 for bonding with the lingual side of teeth and a bracket body 2 fixed with the base plate 1. The side of the bottom plate 1 contacting with the rear tooth tongue side is matched with the shape of the tooth tongue side specific to the patient, so that the bottom plate 1 can be attached to the tooth tongue side of the patient, and the side of the bottom plate 1 attached to the tooth tongue side is provided with reticulate patterns (not shown in the figure), so that the adhesive force between the bottom plate 1 and the tooth surface can be enhanced. The bracket body 2 is fixed on one side of the bottom plate 1 deviating from the side face of the rear tooth tongue, one side of the bracket body 2 close to the top of the tooth is the upper end face of the bracket body 2, the vertical groove 23 used for placing an arch wire is vertically arranged on the upper end face of the bracket body 2, the vertical groove 23 is arranged on one side of the bracket close to the top of the tooth, and the operation that a doctor finds the position of the vertical groove 23 and is convenient for completing the arch wire to enter the groove is facilitated. The upper end surface of the bracket body 2 is slidably connected with a locking cover 3 which is communicated with the opening of the vertical groove 23, and the locking cover 3 plays a role in limiting the arch wire, thereby being beneficial to reducing the probability that the arch wire is separated from the vertical groove 23.

Referring to fig. 1 and 2, a dovetail block 21 is fixed on the upper end face of the bracket body 2, the dovetail block 21 is located on one side of the vertical groove 23 far away from the bottom plate 1, a dovetail groove 31 clamped and sliding with the dovetail block 21 is formed in one side of the lock cover 3 facing the bracket body 2, the length direction of the dovetail groove 31 is arranged facing the bottom plate 1, and openings are formed in two ends of the dovetail groove 31 in the length direction. When a doctor needs to install or adjust the arch wire, the locking cover 3 can be pushed to enable the locking cover 3 to move towards the direction far away from the bottom plate 1 and open the opening of the vertical groove 23, and after the step of enabling the arch wire to enter the groove is completed, the doctor can push the locking cover 3 to enable the locking cover to move towards the direction of the bottom plate 1 and close the opening of the vertical groove 23. The locking cover 3 is in sliding clamping connection with the bracket body 2 through the dovetail groove 31 and the dovetail block 21, and the sliding stability of the locking cover 3 is improved.

Referring to fig. 1 and 2, a fixing seat 22 is fixed on the upper end surface of the bracket body 2, the fixing seat 22 and the bracket body 2 are integrally formed, the fixing seat 22 is located on one side of the vertical groove 23 close to the bottom plate 1, and one side of the fixing seat 22 facing the bottom plate 1 is fixedly connected with one side of the bottom plate 1 away from the lingual side of the teeth. There is a clearance in fixing base 22 towards one side of locking closure 3 and one side that perpendicular slot 23 is close to bottom plate 1, and fixing base 22 towards one side of locking closure 3 and the upper end face of bracket body 2 form breach 6, and when the opening of perpendicular slot 23 was closed to locking closure 3, the one end and the breach 6 gomphosis of locking closure 3 towards bottom plate 1. When the locking lid 3 receives the external force towards the vertical opening in the state of closing the vertical opening, the bottom wall of the notch 6 provides the supporting force opposite to the external force for the end part of the locking lid 3, which is beneficial to reducing the condition that the locking lid 3 is pressed and bent.

Referring to fig. 1 and 2, two upper wings 4 far away from the bottom plate 1 are fixed on one side of the locking cover 3 far away from the vertical groove 23, and the two upper wings 4 are respectively arranged on two sides of the locking cover 3. One side of the bracket body 2 departing from the lock cover 3 is the lower end face of the bracket body 2, and two lower wings 24 far away from the bottom plate 1 are fixed on the lower end face of the bracket body 2. When one end of the locking cover 3 facing the fixed seat 22 is embedded in the notch 6, the two lower wings 24 are respectively positioned right below the two lower wings 24. The upper wing 4, the locking closure 3, vacancy 8 is gone up jointly to one side of fixing base 22 up end and bottom plate 1 orientation, lower wing 24, vacancy 9 is down jointly formed to one side of 2 lower terminal surfaces of die-holder body and bottom plate 1 orientation fixing base 22, the formation of going up vacancy 8 and vacancy 9 is convenient for the doctor to carry out the ligature to the arch wire on clinical operation, upper wing 4 and lower wing 24 are spacing to rubber circle or steel wire, be favorable to reducing the probability of droing of rubber circle or steel wire and increase the frictional force between arch wire and perpendicular groove 23.

Referring to fig. 3 and 4, the bracket body 2 and the dovetail block 21 jointly run through and are provided with a shaft hole 25, the upper end of the shaft hole 25 is communicated with one side of the dovetail block 21 departing from the bracket body 2, and the lower end of the shaft hole 25 is communicated with the lower end face of the bracket body 2. The opening edge of the upper end of the shaft hole 25 is rounded. The bracket body 2 is provided with a shaft wire 5, and the shaft wire 5 can be a nickel-titanium wire or a metal sheet with certain elasticity. The axle wire 5 is arranged in the axle hole 25 in a penetrating way, and one end of the axle wire 5 extending out of the upper end of the axle hole 25 is a movable end of the axle wire 5. The shaft wire 5 is welded and fixed at the port at the lower end of the shaft hole 25. The bottom wall of the dovetail groove 31 is provided with an arc-shaped groove 32, one end of the arc-shaped groove 32, which is far away from the bottom plate 1, is a locking position 321 of the arc-shaped groove 32, one end of the arc-shaped groove 32, which is close to the bottom plate 1, is an locking position 322 of the arc-shaped groove 32, and a transition section 323 of the arc-shaped groove 32 is connected between the locking position 322 and the locking position 321. When the locking position 321 slides to be aligned with the shaft hole 25 along with the locking cover 3, the movable end of the shaft wire 5 is clamped in the locking position 321, one end of the locking cover 3 facing the fixed seat 22 is embedded with the notch 6, the locking cover 3 closes the opening of the vertical groove 23, and at the moment, the locking cover 3 is in a locking state; when the locking position 321 slides to be aligned with the shaft hole 25 along with the locking cover 3, the movable end of the shaft wire 5 is clamped in the locking position 321 and the locking cover 3 opens the opening of the vertical groove 23, and at this time, the locking cover 3 is in an unlocking state. The connecting line direction of the end points of the two ends of the arc-shaped groove 32 is consistent with the length direction of the dovetail groove 31, the transition section 323 of the arc-shaped groove 32 deviates from the connecting line of the two ends of the arc-shaped groove 32, and when the movable end of the shaft wire 5 is clamped in the middle of the transition section, the locking cover 3 is in a transition state. In the switching process of the unlocking state and the locking state of the lock cover 3, the arc-shaped groove 32 is always communicated with the shaft hole 25. When the locking cover 3 is forced to transition from the unlocking state or the locking closing state to the transition state under the action of other external force, the overlapped part of the arc-shaped groove 32 and the shaft hole 25 is reduced towards one side of the dovetail groove 31, the side wall of the arc-shaped groove 32 forces the movable end of the shaft wire 5 to deform and bend towards one side of the dovetail groove 31, so that the shaft wire generates resistance to the sliding of the locking cover 3, the situation that the arch wire is separated due to the fact that the locking cover 3 is accidentally opened when the locking cover 3 chews food is further improved, meanwhile, the situation that the locking cover 3 is accidentally closed due to the fact that the locking cover 3 is mistakenly touched when a doctor puts the arch wire into the vertical groove 23 is also facilitated to be reduced, and the operation that the arch wire enters the groove is facilitated for the doctor.

Referring to fig. 2 and 3, an unlocking groove 221 for the probe to be in place is formed in one side of the fixing seat 22 away from the bracket body 2, the unlocking groove 221 is arranged towards an opening in one side of the locking cover 3, and a doctor can open the locking cover 3 by extending the probe into the unlocking groove 221 and slightly pushing the end of the locking cover 3. The unlocking groove 221 is in a semi-conical shape, when a doctor inserts the probe into the unlocking groove 221, the probe obliquely downwards pushes the locking cover 3 along the side wall of the unlocking groove 221, and the unlocking groove 221 provides a positioning space for the probe and plays a role in guiding, so that the locking cover 3 can be conveniently pushed open. One end of the locking cover 3 facing the fixed seat 22 is provided with a groove 33, and an opening of the groove 33 is opposite to an opening of the unlocking groove 221 facing the locking cover 3. The groove 33 runs through one side of the lock cover 3 facing the bracket body 2 and one side of the lock cover 3 deviating from the bracket body 2. When one end of the locking cover 3 facing the fixed seat 22 is embedded in the notch 6, the unlocking groove 221 and the groove 33 are spliced to form a cavity for inserting the probe, so that the probe with a larger diameter can conveniently extend into the cavity.

Referring to fig. 1 and 2, the corners of the bottom plate 1, the bracket body 2, the fixing seat 22, the locking cover 3, the upper wing 4 and the lower wing 24 are all smoothly arranged. This six mutual linking department smooth transition of part, when the locking closure 3 towards the one end of fixing base 22 and breach 6 gomphosis, the fixing base 22 surface flushes with the locking closure 3 surface, and the one end surface that fixing base 22 was kept away from to locking closure 3 and the one end surface smooth transition of bottom plate 1 is kept away from to support cell body 2 to reduce the condition in the arris angle smooth oral cavity of breaking of part.

The implementation principle of the embodiment 1 is as follows:

when this self-ligating bracket of installation, earlier cooperate with dovetail 31 of locking closure 3 and the 21 joint of forked tail piece of bracket body 2 to slide locking closure 3, make locking closure 3 towards the one end and the 6 gomphosis of breach of fixing base 22, locking closure 3 is in the lock state of closing this moment, then wear 5 one end of axle wire from the shaft hole 25 of holding in the palm the groove body 2 lower extreme up from following, directly support the lock position 321 of closing of locking closure 3, carry out spot welding with the electric welder with the one end that 5 are located the shaft hole 25 of axle wire and the port of shaft hole 25 lower extreme and fix immediately.

When the locking cover 3 needs to be opened to take and place the arch wire, a doctor firstly extends the probe into the gap between the unlocking groove 221 and the groove 33 to be in place, the probe props against the bottom wall of the groove 33 of the locking cover 3, slightly prys the locking cover 3 with light force, the locking cover 3 moves towards one end far away from the fixed seat 22 under the pushing action of the probe, the arc-shaped groove 32 and the shaft hole 25 are always kept in a communicated state in the sliding process, in the process that the movable end of the shaft wire 5 and the locking position 321 are clamped and connected with the transition section 323, the communication area of the arc-shaped groove 32 and the shaft hole 25 is gradually reduced, so that the locking cover 3 is forced to be bent and deformed, the fillet at the upper end of the shaft hole 25 is arranged to provide a space for bending and deformation for the shaft hole 25, when the pushing force of the probe is greater than the resistance force applied to the locking cover 3 due to deformation, the locking wire 5 can push the locking cover 3 away from the notch 6 and open the vertical groove 23 until the movable end of the shaft wire 5 is clamped and the locking position 322, because the locking lid 3 is in the unlocking state and the locking state switching process, the deformation of the axis silk 5 has resistance to the sliding of the locking lid 3, which is beneficial to keeping the opening state of the vertical groove 23 and is convenient for the doctor to take and place the arch wire.

Example 2

Referring to fig. 5 and 6, the present embodiment is different from embodiment 1 in that one side of the lock cover 3 away from the bracket body 2 is a convex arc surface, and the arc-shaped groove 32 is opened on one side of the lock cover 3 facing the bracket body 2. The two upper wings 4 are fixed on the upper end surface of the bracket body 2 and are respectively arranged at two sides of the locking cover 3. The guide groove 7 is sunken in one side that two upper wings 4 are close to each other, and the guide groove 7 is towards the equal open setting of one end of bottom plate 1 and the one end that the guide groove 7 deviates from bottom plate 1, realizes that the joint slides through the cooperation of 3 both sides of locking closure respectively with two guide grooves 7 between the locking closure 3 and the support groove body 2.

The implementation principle of embodiment 2 is similar to that of embodiment 1, except that: in embodiment 2, the lock cover 3 moves under the restriction of the guide grooves 7 formed by the two upper wings and the upper end surface of the bracket body, whereas in embodiment 1, the dovetail groove 31 of the lock cover 3 is engaged with the dovetail block 21 on the upper end surface of the bracket body 2, and the lock cover 3 slides under the restriction of the dovetail block 21.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a perpendicular groove self-ligating bracket of back tooth which characterized in that: including bottom plate (1) that is used for bonding with the tooth face and set up the support groove body (2) that deviates from one side of tooth face in bottom plate (1), perpendicular slot (23) have been seted up to one side that support groove body (2) are close to the tooth top, one side sliding connection that support groove body (2) are close to the tooth top has leads to and closes perpendicular slot (23) open-ended locking closure (3).

2. The vertical groove self-ligating bracket of posterior tooth of claim 1, wherein: one side of the bracket body (2) close to the top of the tooth is provided with a dovetail block (21), and one side of the lock cover (3) facing the bracket body (2) is provided with a dovetail groove (31) which is connected with the dovetail block (21) in a clamping manner.

3. The vertical groove self-ligating bracket of posterior tooth of claim 2, wherein: the supporting groove body (2) and the dovetail block (21) jointly penetrate through and are provided with a shaft hole (25), the bottom wall of the dovetail groove (31) is provided with an arc-shaped groove (32), the supporting groove body (2) is provided with a shaft wire (5) clamped with the arc-shaped groove (32), the shaft wire (5) penetrates through the shaft hole (25), and the shaft wire (5) is fixedly connected with the shaft hole (25); when one end of the arc-shaped groove (32) far away from the bottom plate (1) slides to be aligned with the shaft hole (25) along with the locking cover (3), the locking cover (3) closes the opening of the vertical groove (23); when one end of the arc-shaped groove (32) close to the bottom plate (1) slides to be aligned with the shaft hole (25) along with the locking cover (3), the opening of the vertical groove (23) is opened by the locking cover (3).

4. The vertical groove self-ligating bracket of posterior tooth of claim 1, wherein: one side that holds in the palm cell body (2) are close to the tooth top is provided with fixing base (22), perpendicular slot (23) both sides are put separately to fixing base (22) and dovetail piece (21), one side that fixing base (22) deviate from bottom plate (1) forms breach (6) with one side that holds in the palm cell body (2) are close to the tooth top work as when perpendicular slot (23) opening is sealed in locking closure (3), locking closure (3) towards the one end of bottom plate (1) with breach (6) gomphosis.

5. The vertical groove self-ligating bracket of claim 4, wherein: one side of the fixed seat (22) departing from the supporting groove body (2) is provided with an unlocking groove (221), and the unlocking groove (221) is arranged towards an opening on one side of the locking cover (3).

6. The vertical groove self-ligating bracket of posterior tooth of claim 5, wherein: one end of the lock cover (3) facing the fixed seat (22) is provided with a groove (33), and the opening of the groove (33) is opposite to the opening of the unlocking groove (221) facing the lock cover (3).

7. The vertical groove self-ligating bracket of posterior tooth of claim 3, wherein: and the shaft hole (25) and the dovetail block (21) are arranged in a way of chamfering the edge of an opening at one end communicated with one side of the bracket body (2).

8. The vertical groove self-ligating bracket of posterior tooth of claim 1, wherein: the side of the bottom plate (1) facing the tooth surface is provided with reticulate patterns.

9. The vertical groove self-ligating bracket of posterior tooth of claim 1, wherein: one side that the locking closure (3) deviates from the bracket body (2) is provided with an upper wing (4), one side that the bracket body (2) deviates from the locking closure (3) is provided with a lower wing (24).

10. The vertical groove self-ligating bracket of posterior tooth of claim 1, wherein: one side that holds in the palm cell body (2) deviates from locking closure (3) is provided with down wing (24), one side that holds in the palm cell body (2) are close to the tooth top is provided with two and is located last wing (4) of locking closure (3) both sides respectively, two one side that last wing (4) are close to each other all caves in and has supplies the gliding guide way (7) of locking closure (3) both sides joint.

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