CN112438814A

CN112438814A - Zero-clearance bracket for tooth orthodontics

Info

Publication number: CN112438814A
Application number: CN201910823734.2A
Authority: CN
Inventors: 植文炳; 杨国平
Original assignee: Guangzhou Chuangqi Medical Technology Co ltd
Current assignee: Guangzhou Chuangqi Medical Technology Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2021-03-05
Anticipated expiration: 2039-09-02
Also published as: CN112438814B

Abstract

The invention relates to a zero-clearance bracket for orthodontics, which comprises a bracket body, wherein the bracket body comprises a bottom plate and a base, an upper limiting wing and a lower limiting wing are arranged on one side of the base far away from the bottom plate, an arch wire groove for placing an orthodontic arch wire is formed between the upper limiting wing and the lower limiting wing on one side of the base far away from the bottom plate, a movable groove with the length direction perpendicular to the length direction of the arch wire groove is formed in the base, the movable groove is communicated with the arch wire groove, a pressing block abutted against the orthodontic arch wire is arranged in the movable groove in a sliding mode, and a ligature wire for pressing the pressing block is sleeved on the upper. Through the setting, the pressure of ligature wire supports the briquetting to correcting the arch wire direction tightly, and the briquetting makes and corrects and reduces the clearance between arch wire and the arch wire slot, and then has improved and has corrected the effect that the arch wire is correcting the torque of in-process and correcting the power expression. And the use of the fixing piece is reduced, the operation is easier in a narrow space in the oral cavity, the foreign body sensation of a user is lower, and the comfort of the user is improved.

Description

Zero-clearance bracket for tooth orthodontics

Technical Field

The invention relates to the technical field of orthodontic brackets, in particular to a zero-clearance bracket for tooth orthodontics.

Background

At present, in the process of using the orthodontic device to carry out orthodontic treatment of oral teeth clinically by doctors, common brackets and self-locking brackets are used for bonding bracket bodies on tooth surfaces, and correcting arch wires penetrate through arch wire grooves on the bracket bodies. The common bracket uses a ligature wire or a rubber ligature ring to fix the correcting arch wire in the arch wire groove of the bracket body, and the self-locking bracket fixes the correcting arch wire in the arch wire groove by depending on a sliding or rotating bracket cover, a bolt cover or an elastic clamp, so that the acting force of the correcting arch wire drives the bracket body to apply force to teeth, thereby achieving the effect of correcting the teeth in the oral cavity.

Because need use the arch wire of a series of sizes in the orthodontic treatment of tooth in-process, the cross-sectional dimension is usually from little to big, from circular cross-section to square cross-section, so the bracket body can set up arch wire groove size great in the manufacturing process, satisfies to make the biggest square arch wire also can install into in the arch wire groove. When the size of the correction arch wire used in the later stage is smaller, the correction arch wire can have a certain gap with the upper top surface of the arch wire groove when being placed into the arch wire groove, so that the correction arch wire can not be tightly abutted to the arch wire groove or can not be twisted in the arch wire groove, the correction force and the torque required in the correction process can not be completely expressed, the orthodontic treatment of teeth is influenced, and the expected treatment effect is not obtained at last.

The existing bracket body adopts the special-shaped arch wire, the special-shaped arch wire is tightly matched with the special-shaped main groove of the bracket body to clamp the special-shaped arch wire, so that the special-shaped arch wire cannot move randomly in the main groove, but along with the gradual displacement of teeth, the correction arch wire needs to move relative to the bracket body, and the mode of tightly clamping the special-shaped arch wire can influence the expression of the arch wire on the correction force and the torque to influence the correction effect.

The existing self-locking bracket adopts a mode that a screw which penetrates through a bracket body and extends into an arch wire groove supports and tightly leans against an arch wire to limit the arch wire, and the arch wire is supported and tightly leaned against the arch wire groove, so that the data of the arch wire is well expressed. On one hand, the self-ligating bracket has larger volume than the common bracket, and particularly when the self-ligating bracket is used at the tongue side, the foreign body sensation of the self-ligating bracket is strong; on the other hand, the space on the lingual side is limited, the feasibility of the method of limiting the orthodontic arch wire by adopting the screw is poor, the operation difficulty of a doctor is higher, and the cost is higher, so that the improvement space exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a tooth orthodontics zero-clearance bracket which has the function of tightly abutting a correcting arch wire with an arch wire groove, improves the effects of torque and force expression of correcting the correcting arch wire in the correcting process, and is lower in cost and more convenient.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an orthodontic zero clearance holds in palm groove, includes and holds in the palm the cell body, it includes bottom plate and base to hold in the palm the base is keeping away from one side of bottom plate is provided with spacing wing and lower spacing wing, the base is kept away from one side of bottom plate is in go up spacing wing and offer the arch wire groove that is used for placing between the spacing wing down and correct the arch wire, the base has been seted up length direction and has been pointed to the activity groove of arch wire groove, the activity groove with arch wire groove intercommunication, the activity inslot slide be provided with correct the briquetting of arch wire butt, go up spacing wing with lower spacing wing has cup jointed the ligature that compresses tightly the briquetting jointly.

Through the setting, the support groove body includes mutual fixed's floor and base, and the base is fixed with the last spacing wing that extends up and the lower spacing wing that extends down respectively in the one side of keeping away from the bottom plate, and the base is sunken to have both ends to link up between upper limit displacement and the lower spacing wing and set up the arch wire groove, goes up spacing wing and lower spacing wing and is used for supplying the ligature wire to connect, and the ligature wire includes the ligature circle of stainless steel ligature wire or rubber material to cup joint through ligature wire ligature or ligature circle and will rescue the arch wire and support tightly and spacing in the arch wire groove. Wherein it is provided with the directional briquetting of correcting the arch wire of direction of motion to slide in the activity inslot, when ligature circle cup joints with last spacing wing and lower spacing wing, ligature circle pressure supports the briquetting to correcting the arch wire direction tightly to make through the briquetting and correct the clearance between arch wire and the arch wire slot and reduce, make and correct arch wire and arch wire slot and support tightly, and then improved and corrected the effect that the torque of in-process and correction power express of arch wire. And directly adopt ligature silk or ligature circle to support the mode that the briquetting pressed tightly, reduced the use of mounting to it is littleer to make this support groove volume, changes in the narrow and small space in the oral cavity and operates, and user's foreign matter sense is lower, improves user's travelling comfort. And an additional fixing piece for positioning the pressing block is not used, so that the production cost of the bracket is reduced, and the price is more attractive to people. The pressing block has a certain movement stroke range under the action of the ligature wire or the ligature ring, and the capability of adapting to different orthodontic wires of the bracket is improved.

The invention is further provided that the movable groove is arranged on the upper end surface of the base and is positioned between the upper limiting wing and the bottom plate.

Through the setting, set up the activity groove in the up end of base to the in-process briquetting that uses is downward naturally under the effect of self gravity, when will correcting the arch wire and put into the arch wire slot briquetting can with correct the natural butt of arch wire, the doctor of being convenient for installs the ligature silk, the doctor of being convenient for operates. The movable groove is positioned between the upper limiting wing and the bottom plate, so that the ligature wire can directly support the pressing block when being installed with the upper limiting wing and the lower limiting wing, and the use of the fixing piece for fixing the pressing block is reduced.

The base is further provided with a limiting block which is fixed at the bottom of the arch wire groove and used for shielding the movable groove, the base penetrates through the upper limiting wing and is provided with a limiting groove perpendicular to the bottom plate, the limiting groove is communicated with the movable groove and the arch wire groove, the pressing block comprises a supporting block which is protruded towards the direction of the limiting groove and fixed and is positioned in the limiting groove, and the supporting block is abutted against the arch wire under the action of the ligature wire.

Through the arrangement, the movable groove and the arch wire groove are staggered by the limiting block, the movable groove and the arch wire groove are communicated through the limiting groove, and the pressing block comprises the supporting block which protrudes and is fixed towards the limiting groove direction and moves up and down in the limiting groove. Thereby when the ligature wire compresses tightly the briquetting and moves down, support the piece and follow the briquetting and move down and support tightly and correct the arch wire, wherein support the extension length of piece and satisfy when the ligature wire will be corrected the arch wire and support tightly in arch wire groove bottom, support the piece and correct the butt of arch wire up end. Thereby through stopper and spacing groove to the briquetting with support the spacing of piece, the briquetting also does not break away from with the base when not acting on the briquetting at the ligature silk, and the doctor of being convenient for carries out the installation operation in support groove in narrow and small oral cavity space, reduces the briquetting and drops the adverse effect that causes the user.

The arch wire groove is provided with a limiting block, and the limiting block is arranged on the side surface of the arch wire groove close to the upper limiting wing.

Through the arrangement, a distance is arranged between the upper end face of the limiting block and the side wall of the arch wire groove close to the upper limiting wing at intervals, so that the adaptability of correcting the size of the arch wire and the stroke range of the abutting block moving up and down in the limiting groove are improved. Furthermore, in the whole orthodontic process, the abutting block can perform the abutting effect on the arch wire which needs to be replaced and is corrected in different sizes, and the torque and the effect of correcting force expression of the arch wire in the using process are improved.

The invention further provides that one end of the abutting block, which is far away from the pressing block, is provided with an inclined surface, and the inclined surface faces to the direction far away from the upper limiting wing.

Through the setting, the inclined plane has been seted up keeping away from the one end of briquetting to the piece of supporting, the orientation of the plane on inclined plane is kept away from the direction of spacing wing to when putting into the arch wire slot with correcting the arch wire, correct the arch wire and support the inclined plane butt of piece, the inclined plane produces the pressure of upwards acting to supporting piece and briquetting according to the orthogonal decomposition principle of power. Thereby make to block and briquetting respectively in spacing groove and activity inslot to rise a section distance, be convenient for correct the arch wire and put into the arch wire slot, and then be convenient for the doctor to correct the installation work of arch wire in narrow and small oral cavity space.

The invention is further provided that one end of the upper limiting wing far away from the lower limiting wing and/or one end of the lower limiting wing far away from the upper limiting wing are provided with notches.

Through the aforesaid setting, the setting of breach is convenient for the doctor through shaft-like instrument with the ligature circle with last spacing wing or lower spacing wing installation, cup joint earlier with ligature circle and lower spacing wing or lower spacing wing and shaft-like instrument promptly, then in the breach is arranged in to shaft-like instrument, use the breach as the fulcrum rotation, rotate the position of ligature circle between supreme spacing wing and the bottom plate or between lower spacing wing and the bottom plate, the realization is convenient for cup joint the effect of ligature circle and last spacing wing and lower spacing wing, the breach plays the spacing effect of removal to shaft-like instrument, reduce shaft-like instrument and go up the gliding condition on last spacing wing.

The invention is further provided with a stop block fixed at one end of the lower limiting wing far away from the upper limiting wing and/or one end of the upper limiting wing far away from the lower limiting wing, and the projection area of the stop block on the horizontal plane is larger than and covers the projection area of the lower limiting wing and/or the upper limiting wing on the horizontal plane.

Through the arrangement, the maximum cross sectional area of the check block is larger than the maximum cross sectional area of the lower limiting wing or the upper limiting wing, so that the limitation on the ligature wire or the ligature ring is improved through the arrangement of the check block, the ligature wire or the ligature ring is not easy to separate from the lower limiting wing or the upper limiting wing, and the maintenance cost is reduced.

The invention is further provided that the cross sections of the pressing block and the abutting block are both trapezoidal, the shapes of the movable groove and the limiting groove are respectively matched with the pressing block and the abutting block, and the width of the abutting block is smaller than that of the pressing block.

Through the setting, set up the briquetting and support the cross section of piece to trapezoidal, and the cross sectional shape in activity groove and spacing groove respectively with the briquetting, support the piece cooperation to it is spacing to rotate the briquetting and support the piece through activity groove and spacing groove, makes the briquetting and support the piece and only at the vertical direction up-and-down motion, is convenient for compress tightly the arch wire to correcting. The width of the supporting block is smaller than that of the pressing block, so that the pressing block, the supporting block, the movable groove and the limiting groove are convenient to install, and the pressing block and the supporting block are made of materials with certain deformation capacity.

The invention is further provided that the surface of the bottom plate, which faces away from the base, is arc-shaped and is provided with reticulate patterns.

Through the above arrangement, because the bottom plate is generally adhered to the dental crown, the dental crown is a curved surface, and the circular arc shape and the arrangement of the bottom plate with the reticulate pattern make the contact area between the bottom plate and the dental crown larger, the adhesion effect is better, and the dental crown is not easy to fall off.

In conclusion, the invention has the following beneficial effects:

1. the movable groove and the limiting groove which are communicated with the arch wire groove are arranged, the pressing block and the abutting block slide up and down in the movable groove and the limiting groove, the pressing block and the abutting block are extruded downwards through the ligature wire or the ligature ring, and then the orthodontic arch wire is abutted to the arch wire groove through the abutting block, so that the torque and the expression effect of orthodontic force of the orthodontic arch wire in the orthodontic process are improved, the ligature wire or the ligature ring is enabled to limit the orthodontic arch wire, the function of abutting the pressing block is achieved, the use of a locking piece for fixing the pressing block is reduced, the cost of the bracket is reduced, and the bracket is more convenient to use;

2. the top end of the upper limiting wing is provided with the notch, and the end part of the lower limiting wing, which is far away from the upper limiting wing, is fixed with the stop block, so that the binding wire is convenient to limit, the separation condition of the binding wire or the binding ring from the bracket body is reduced, the maintenance frequency is reduced, and the arrangement of the notch is convenient for a user to install the binding ring and the upper limiting wing through a rod-shaped tool.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a partial sectional view of the present embodiment;

FIG. 3 is a sectional view of the present embodiment;

fig. 4 is an exploded view of the structure of the present embodiment.

Reference numerals: 1. a bracket body; 11. a base plate; 12. a base; 13. an upper limiting wing; 131. a notch; 14. a lower limiting wing; 141. a stopper; 15. an arch wire groove; 16. a movable groove; 17. a limiting block; 18. a limiting groove; 2. correcting the arch wire; 3. briquetting; 31. a resisting block; 32. an inclined surface; 4. and (5) binding the wires.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 2, the tooth orthodontic zero clearance bracket disclosed by the invention comprises a bracket body 1, wherein the bracket body 1 comprises a bottom plate 11 and a base 12 fixedly connected with the bottom plate 11, the surface of the bottom plate 11, which is back to the base 12, is arc-shaped and is provided with reticulate patterns, and the reticulate patterns are not shown in the figure.

A block-shaped upper limiting wing 13 and a block-shaped lower limiting wing 14 are fixed on one side of the base 12 far away from the bottom plate 11 in a protruding mode, the upper limiting wing 13 is arranged right above the lower limiting wing 14, the upper limiting wing 13 and the lower limiting wing 14 respectively extend towards the direction far away from each other, an arch wire groove 15 (shown in figure 4) with a cross section shaped like a Chinese character 'ao' is sunken between the upper limiting wing 13 and the lower limiting wing 14 of the base 12, and the length direction of the arch wire groove 15 is perpendicular to a connecting line between the upper limiting wing 13 and the lower limiting wing 14. The end parts of the upper limiting wing 13 and the lower limiting wing 14, which are deviated from each other, are bent towards the direction of the bottom plate 11, and a gap is reserved between the upper limiting wing 13 and the lower limiting wing 14 and the bottom plate 11 and is used for the stainless steel ligature wire 4 or the rubber ligature ring to pass through and be sleeved with the base 12.

Wherein go up the spacing wing 13 and keep away from the one end of lower spacing wing 14 and seted up convex breach 131, breach 131 is used for supplying the doctor to use the shaft-like instrument to overturn rubber ligature circle when cup jointing rubber ligature circle, and breach 131 removes spacing and plays the effect of fulcrum to the shaft-like instrument, plays laborsaving and convenient effect when overturning ligature circle through the lever theorem. In one embodiment, the notch 131 may be disposed at an end of the lower-limiting wing 14 far from the upper-limiting wing 13, and in another embodiment, the notch 131 may be disposed at both ends of the upper-limiting wing 13 and the lower-limiting wing 14.

Wherein, a stopper 141 is fixed at one end of the lower limiting wing 14 far from the upper limiting wing 13, the projected area of the stopper 141 on the horizontal plane is larger than and covers the projected area of the lower limiting wing 14 on the horizontal plane, wherein the projected area of the lower limiting wing 14 on the horizontal plane is gradually reduced from the base 12 to the stopper 141, and the stopper 141 is provided in a smooth ellipsoid shape. Through the arrangement of the stop block 141, the ligature wire 4 or the ligature ring is convenient to limit, the separation of the ligature wire 4 or the ligature ring from the base 12 is reduced, and the maintenance frequency in the use process of the bracket is further reduced. In one embodiment, the stopper 141 may be fixed to an end of the upper limiting wing 13 far from the lower limiting wing 14, and in another embodiment, the stopper 141 may be fixed to ends of both the upper limiting wing 13 and the lower limiting wing 14.

As shown in fig. 2 to 3, a movable slot 16 whose length direction is perpendicular to the length direction of the archwire slot 15 is vertically and downwardly opened on the upper end surface of the base 12, wherein the movable slot 16 is positioned between the upper limiting wing 13 and the bottom plate 11, and the movable slot 16 is communicated with the archwire slot. A limiting block 17 used for shielding the movable groove 16 is fixed at the bottom of the arch wire groove of the base 12, wherein the projection area of the limiting block 17 on the horizontal plane is smaller than the cross-sectional area of the movable groove 16, a limiting groove 18 is formed in one side, far away from the bottom plate 11, of the base 12, and is perpendicular to the bottom plate 11, and the limiting groove 18 is communicated with the movable groove 16 and the arch wire groove 15.

As shown in fig. 3 to 4, the pressing block 3 slides up and down in the movable groove 16, the pressing block 3 includes a pressing block 31 protruding and fixed in the limiting groove 18 toward the limiting groove 18, when the pressing block 3 slides up and down in the movable groove 16, the pressing block 31 slides up and down in the limiting groove 18, and a space is provided between the side of the limiting block 17 facing the movable groove 16 and the side wall of the archwire groove near the upper limiting wing 13. Therefore, after the correcting arch wire 2 is placed in the arch wire groove 15, the upper limiting wing 13 and the bottom plate 11 and the lower limiting wing 14 and the bottom plate 11 are sleeved through the ligaturing wire 4 or the ligaturing ring, the correcting arch wire 2 is tightly abutted in the arch wire groove 15 through the ligaturing wire 4 or the ligaturing ring, and the correcting arch wire 2 is abutted to the limiting block 17. At this moment, the ligature wire 4 or the ligature ring is abutted against the upper end face of the pressing block 3, downward pressure is applied to the pressing block 3, the abutting block 31 is further abutted against the arch wire 2 in the arch wire groove, the arch wire 2 is abutted against the lower end face of the arch wire groove, and the torque of the arch wire 2 in the correcting process and the expression effect of the correcting force are improved. And make ligature wire 4 or ligature circle still compress tightly briquetting 3 when carrying on spacingly correcting arch wire 2, reduced the use of extra fastener, kill two birds with one stone, reduced the cost and the volume of this support groove, improved the operating efficiency of doctor in narrow and small oral cavity space like the lingual side position to user's use travelling comfort has been improved.

Wherein, the end of the abutting block 31 far away from the pressing block 3 is provided with an inclined surface 32, and the plane of the inclined surface 32 faces the direction far away from the upper limiting wing 13 and the bottom plate 11, so that when the orthodontic arch wire 2 is placed in the arch wire groove, the orthodontic arch wire 2 abuts against the inclined surface 32 of the abutting block 31, and the inclined surface 32 generates upward pressure on the abutting block 31 and the pressing block 3 according to the orthogonal force decomposition principle. Therefore, the abutting block 31 and the pressing block 3 respectively rise for a certain distance in the limiting groove 18 and the movable groove 16, so that the arch wire 2 can be conveniently corrected and placed in the arch wire groove, and further, a doctor can conveniently correct and correct the installation work of the arch wire 2 in a narrow oral space.

The pressing block 3 and the abutting block 31 are both set to be trapezoidal in cross section, the movable groove 16 and the limiting groove 18 are respectively matched with the pressing block 3 and the abutting block 31, the movable groove 16 and the limiting groove 18 are enabled to respectively rotate and limit the pressing block 3 and the abutting block 31 through the trapezoidal shape, the pressing block 3 and the abutting block 31 do not rotate in the up-and-down moving process of the movable groove 16 and the limiting groove 18, and the abutting state of the abutting block 31 and the correcting arch wire 2 is kept. The extending direction of the abutting block 31 is perpendicular to the extending direction of the pressing block 3, and the width of the abutting block 31 is smaller than that of the pressing block 3, so that a user can conveniently install the pressing block 3 and the abutting block 31 with the movable groove 16 and the limiting groove 18 respectively.

The implementation principle of the embodiment is as follows:

when the zero-clearance bracket for orthodontics is used in clinical operation, a doctor places the pressing block 3 in the movable groove 16 in advance and enables the abutting block 31 to be located in the limiting groove 18, the lower end face of the pressing block 3 is abutted to the upper end face of the limiting block 17 under the action of gravity, the pressing block 3 and the limiting block 17 can respectively slide up and down in the movable groove 16 and the limiting groove 18, and the sliding stroke is the vertical distance between the upper end face of the limiting block 17 and the side face, close to the upper limiting wing 13, of the arch wire groove 15. And the limit block 17 and the limit groove 18 limit the support block 31, so that the pressing block 3 of the bracket is not easy to separate from the bracket body 1 in clinical operation, the injury to a user caused by misoperation is reduced, and the operation of a doctor is more convenient.

Then, a doctor fixes the bracket bodies 1 provided with the pressing blocks 3 on corresponding dental crowns of patients, positions the correction arch wire 2 in the arch wire groove 15, corrects the arch wire 2 in the process of entering the arch wire groove 15, abuts against the inclined surface 32 of the supporting block 31 and pushes the supporting block 31 and the pressing blocks 3 to move upwards until the supporting block 31 abuts against the upper end surface of the correction arch wire 2 and the lower end surface of the supporting block 31 under the action of gravity. At the moment, the stainless steel ligature wire 4 or the rubber ligature ring is sleeved with the upper limiting wing 13 and the lower limiting wing 14 at the same time, so that the orthodontic arch wire 2 is abutted against the limiting block 17 in the arch wire groove 15. And ligature wire 4 or ligature circle exert decurrent pressure to briquetting 3 under the in-process of tightening up, and then make to support the piece 31 and support tightly and correct arch wire 2, make and correct arch wire 2 and support the lower lateral wall of tight arch wire slot, improve and correct the expression effect that arch wire 2 was correcting the torque of in-process and was corrected the power to make the orthodontic treatment of tooth reach good effect.

When the ligature ring is used, the ligature ring can be sleeved with the lower limiting wing 14, then the rod-shaped tool penetrates through the ligature ring and abuts against the notch 131 of the upper limiting wing 13, the rod-shaped tool is turned over to enable the ligature ring to be turned over between the upper limiting wing 13 and the bottom plate 11, and therefore a user can conveniently connect the ligature ring with the bracket body 1 and compress the pressing block 3.

When a doctor needs to disassemble the base support groove in the clinical use process, the doctor can directly cut the ligature wire 4 or the ligature ring, and then the pressing block 3 is released and the arch wire 2 is corrected, so that the effect of quick unlocking is achieved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides an orthodontic zero clearance bracket, includes bracket body (1), bracket body (1) includes bottom plate (11) and base (12), base (12) are keeping away from one side of bottom plate (11) is provided with spacing wing (13) and spacing wing (14) down, base (12) are kept away from one side of bottom plate (11) is in go up spacing wing (13) and spacing wing (14) down offer arch wire groove (15) that are used for placing between and rescue arch wire (2), characterized by: the length direction is directional base (12) are seted up movable groove (16) of arch wire groove (15), movable groove (16) with arch wire groove (15) intercommunication, slide in movable groove (16) be provided with pressing block (3) of correcting arch wire (2) butt, go up spacing wing (13) with lower spacing wing (14) have cup jointed jointly and have compressed tightly ligature silk (4) of pressing block (3).

2. The orthodontic zero-clearance bracket of claim 1, wherein: the movable groove (16) is arranged on the upper end face of the base (12) and is positioned between the upper limiting wing (13) and the bottom plate (11).

3. The orthodontic zero-clearance bracket as set forth in claim 2, wherein: the base (12) is fixed with in the bottom of arch wire groove (15) and shelters from stopper (17) of activity groove (16), base (12) link up go up spacing wing (13) and seted up the perpendicular to spacing groove (18) of bottom plate (11), spacing groove (18) with activity groove (16), arch wire groove (15) intercommunication, briquetting (3) are including the orientation spacing groove (18) direction protrusion is fixed be located support piece (31) in spacing groove (18), support piece (31) be in under ligature wire (4) effect with arch wire (2) butt.

4. The orthodontic zero clearance bracket of claim 3, wherein: the side surface of the limiting block (17) facing the movable groove (16) and the side wall of the arch wire groove (15) close to the upper limiting wing (13) are spaced.

5. The orthodontic zero clearance bracket of claim 3, wherein: one end, far away from the pressing block (3), of the abutting block (31) is provided with an inclined surface (32), and the inclined surface (32) faces to the direction far away from the upper limiting wing (13).

6. The orthodontic zero-clearance bracket of claim 1, wherein: and a notch (131) is formed in one end, far away from the lower limiting wing (14), of the upper limiting wing (13) and/or one end, far away from the upper limiting wing (13), of the lower limiting wing (14).

7. The orthodontic zero-clearance bracket of claim 1, wherein: a block (141) is fixed at one end of the lower limiting wing (14) far away from the upper limiting wing (13) and/or one end of the upper limiting wing (13) far away from the lower limiting wing (14), and the projection area of the block (141) on the horizontal plane is larger than and covers the projection area of the lower limiting wing (14) and/or the upper limiting wing (13) on the horizontal plane.

8. The orthodontic zero clearance bracket of claim 3, wherein: the cross sections of the pressing block (3) and the abutting block (31) are both trapezoidal, the shapes of the movable groove (16) and the limiting groove (18) are respectively matched with the pressing block (3) and the abutting block (31), and the width of the abutting block (31) is smaller than that of the pressing block (3).

9. The orthodontic zero-clearance bracket of claim 1, wherein: the surface of the bottom plate (11) back to the base (12) is arc-shaped and provided with reticulate patterns.