WO2014008831A1

WO2014008831A1 - Self-locking bearing groove with elastic-ring locking buckle on working wing

Info

Publication number: WO2014008831A1
Application number: PCT/CN2013/078826
Authority: WO
Inventors: 黄兵民
Original assignee: 北京圣玛特科技有限公司
Priority date: 2012-07-09
Filing date: 2013-07-04
Publication date: 2014-01-16
Also published as: CN102772254A; CN102772254B

Abstract

A self-locking bearing groove with an elastic-ring locking buckle (3) on a working wing (2), which comprises a bearing groove bottom plate (1) and the working wing (2) arranged on a buccal labial surface of the bearing groove bottom plate (1). The working wing (2) comprises a base connected with the bearing groove bottom plate (1), the middle part of the base is recessed to form slots (21), and all the slots (21) are arranged on the axis of one slot. The base is divided into a first base (22) and a second base (23) by the axis of the slot. The elastic-ring locking buckle (3) is provided on the top of the first base (22), and comprises a spring piece (32) and a free end (33). One end of the spring piece (32) is fixed with the first base (22), and the other end of the spring piece (32) is connected with the free end (33). The spring piece (32) is a bending piece with elasticity, and the free end (33) is suspended above the buccal labial surface of the working wing (2). A clamping piece (35) and a blocking piece (36) which extend from different directions are arranged on the free end (33). When the spring piece (32) is in a loose state, the clamping piece (35), the blocking piece (36) and the slots (21) together form an arch wire groove. The clamping piece (35) and the blocking piece (36) move simultaneously and synchronously, so that the functions of closing an arch wire outlet/inlet port (4) and restricting an arch wire in the arch wire groove are both realized.

Description

Description: A self-locking bracket with an elastic ring lock on a working wing

The invention relates to the field of dental orthodontic instruments, in particular to a self-locking bracket with an elastic ring lock on a working wing. Background technique

Orthodontic treatment is a specialized discipline in the field of dentistry. It is mainly used to correct teeth, jaws and facial deformities. The orthodontic appliance is fixed inside the mouth to gradually restore the normal occlusion function of the patient. The bracket is an important part of the orthodontic appliance. It is mainly bonded to the anterior teeth, the canines and the premolars. The orthodontic treatment guides the dislocated teeth to the ideal position by installing the correcting archwire in the groove of the bracket. s position.

Conventional brackets use a ligation wire or an elastic rubber band to ligature the archwire in the groove. However, this type of fixation has the disadvantages of inconvenient clinical operation, large friction, and poor comfort. In recent years, the emergence of self-l igat ing bracket correction systems has led to new approaches for orthodontic treatment of malocclusion. The biggest feature of the self-locking bracket is that the self-locking structure of the bracket replaces the traditional ligature wire (loop) to ligature the archwire, which reduces the friction inside the orthodontic appliance and makes the correction efficiency significantly increase. Comfortable and safe fixed orthodontic device. At present, the self-locking bracket has the unique advantages of low friction, reduced anchorage loss, improved clinical operation efficiency, and light response of the patient to the traditional bracket, and the self-locking bracket is stable, small and beautiful, and the patient wears Comfortable, easy to clean, shorter chair time, longer interval for re-diagnosis, high efficiency and shorter duration of treatment. This makes the self-locking brackets more and more recognized and affirmed by orthodontists.

A common self-locking bracket is a passive sl ide or a spring cl ip. The slide brackets are provided with sliding covers on both sides of the groove. After the arch wire is inserted, the sliding cover is pushed to form a solid closed wire which can be freely moved by the arch wire. It is also called passive self-ligation. Bracket ). The locking device bracket has a built-in high-elastic locking device. The elastic pressure generated after closing can be applied to the archwire when needed, providing a continuous soft orthodontic force. Also known as active self-ligating bracket (active self-l igating) Bracket ). Since the self-locking device of the self-locking bracket is mostly located in the bracket gold It is a surface, easy to use tools or fingertip switches, and the ligation process is simpler.

At present, most of the self-locking brackets have certain design defects, and the sliding cover or the locking device are easy to open under the influence of some unexpected factors. If the sliding cover or the locking device is accidentally opened, the control of the arching wire will be lost, and the influence is affected. The therapeutic effect, on the other hand, extends the treatment time. Moreover, due to the complicated structure of the self-locking bracket, some external forces (including chewing force) and incorrect operation of the doctor may cause damage to the self-locking bracket, which may cause the sliding cover or the locking device to be unable to open and close, even in severe cases. The self-locking brackets are scrapped, which increases the economic burden on patients and increases the cost of treatment. Again, the self-locking device of the self-locking bracket usually occupies a large space on the tooth surface, so that the self-locking bracket has a large thickness and may fall off during chewing, so the use of children with poor compliance and deep overbite patients is used. There are limitations. At the same time, due to the short and rounded working wing of the self-locking bracket, the retention is inconvenient and slippery when adding the ligation attachment, and the self-locking bracket and the traditional double-wing bracket are in the process of inserting the archwire and removing the archwire. Compared with great discomfort, it often causes pain in patients. In addition, when adjusting individual teeth with curved stainless steel square wires, it is difficult to close the arch or the locking device, which limits the use of traditional fine adjustment methods.

Chinese patent: Shape memory self-locking orthodontic bracket (Patent No.: 200580028504. 3, application date: 2005. 07. 01) discloses a self-locking bracket in which a part of the working wing is yieldable, wherein the self-locking bracket There is a bracket bottom plate and one or more working wings. The working wing includes a base connected to the bracket bottom plate, and a groove formed by a downward depression of the center of the top of the base, the groove is for receiving the arch wire. The upper ends of the two side walls of the groove project to the opposite side to form flanges that extend toward the upper side of the groove. The two side walls of the groove have a certain yielding property. When the two side walls of the groove are in a relaxed state, the ends of the two flanges are connected or nearly connected to lock the groove; when the two sides of the groove are relatively moved Upon deformation, an archwire entry occurs between the ends of the two flanges through which the archwire can be placed or removed from the slot. Since the two side walls of the groove of the working wing in the patent are relatively moved and deformed under the action of external force, the archwire inlet can be opened, so in clinical application, the doctor needs to apply sufficient force on both side walls of the groove. In order to complete the procedure of entering or removing the archwire into the bracket groove, the patient has a higher degree of pain. Moreover, the two side walls of the groove are also susceptible to irreversible deformation under the influence of external force (for example, under the action of the arch wire), which reduces the control of the groove on the arch wire and adversely affects the correction effect. At the same time, since the two side walls of the groove can be relatively moved by force, there is a high risk of accidental escape of the arch wire from the groove.

US Patent: Orthodontic brackets (publication number US2011/0059414 A1, priority date: 2008. 03. 14) discloses a self-locking bracket, from the top of the two side walls of the groove (self-locking bracket lip) Buccal) extending to the bottom of the groove The stretched elastic self-locking member has a wedge-shaped slit between the sheet-like self-locking member and the side wall of the groove. Due to the existence of the slot, the sheet-like self-locking member can be elastically deformed with respect to the side wall of the groove, that is, the sheet member can be deformed under an external force, and the arch wire is squeezed through the space between the free ends of the two sheet members. The groove, and then the sheet member returns to its original shape, and its free end acts as a stop member to retain the archwire in the groove. Since the patent utilizes one or two sheet-like self-locking members in the space between the tops of the two side walls of the groove, and uses the elastic deformation of the sheet-like self-locking member in the range below the slot to realize the bracket The self-locking function, therefore, the movable range of the self-locking component is very limited, and in the clinical application, there is a large size arch wire (such as a wire diameter of 0. 021 inches X 0. 025 inches) difficult to enter the groove, etc. problem. Moreover, since the sheet-like self-locking member is bent and deformed with respect to the side wall of the groove during the insertion of the arch wire, the connection portion between the sheet-shaped self-locking member and the top of the side wall of the groove is concentrated, so that the connection portion is relatively easy. Permanent deformation or fracture occurs, that is, the joint portion is easily deformed or broken after repeated bending, so that the bracket loses the self-locking function and the control of the archwire. In addition, in clinical practice, orthodontists often need to remove the archwire that has been placed in the groove, re-adjust and then place it into the bracket groove, and the patent does not consider how to conveniently remove the archwire. The operation of taking the wire is cumbersome and inconvenient, and the required force is large, which is likely to cause discomfort to the patient and deformation and breakage of the self-locking member. Summary of the invention

The present invention is directed to the deficiencies of the prior art, and provides an accurate control of the opening and closing of the archwire entrance and exit, effectively limiting the archwire in the archwire slot, and the physician can control the archwire entrance and exit with only one action. The utility model has the advantages of limiting the archwire and the like, and has the self-locking bracket with the elastic ring lock on the working wing which has the functions of integrated function, simple structure and high wearing comfort of the patient.

The technical solution of the present invention is as follows:

A self-locking bracket includes a bracket bottom plate and a working wing disposed on a lip-cheek surface of the bracket bottom plate, the working wing includes a base connected to the bracket bottom plate, and the base portion is downwardly recessed Forming a groove, all of the grooves are on a groove axis; the base is divided into a first base and a second base by the groove axis; and the first base is disposed at the top An elastic ring lock, the elastic ring lock includes a spring piece and a free end, the elastic piece is fixed at one end to the first base, and the other end is connected to the free end, and the elastic piece is a flexible curved piece, the free Hanging over the cheek surface of the working wing; the free end is provided with a card and a blocking piece extending in different directions, when the elastic piece is in a relaxed state, the card and the blocking piece The sheet and the groove together form an archwire slot.

The inner space is sufficient to accommodate the flap when the elastic piece is deformed by an external force. When the elastic piece is in a relaxed state, the end of the card is in contact with the groove wall of the groove on the second base or only a narrow gap is left, and the end of the blocking piece and the first base are The top is connected or only a small gap is left.

5毫米。 The narrow gap is less than 0. 3mm.

The angle between the card and the flap is a right angle or a nearly right angle.

The card end and the upper portion of the first base are temporarily locked by a snap structure.

The snap structure includes a tapered flange disposed at an edge of the end of the card and a tab disposed on the top of the groove wall of the groove on the first base.

The free end projects a support piece for limiting the degree of deformation of the elastic piece toward the inner side surface of the elastic piece. An operation hole is disposed on the cheek side of the support piece, and an operation window is disposed on the elastic piece at a position corresponding to the operation hole.

The work wing and the elastic ring lock are made of elastic metal.

The elastic metal is a nickel titanium shape memory alloy, a nickel titanium based shape memory alloy, a titanium based alloy, a cobalt chrome alloy or stainless steel.

The bracket bottom plate, the working wing and the elastic ring lock are integrally formed, and the integral forming method is metal casting, metal powder injection molding, wire cutting, laser engraving or laser cutting. The technical effects of the present invention are as follows:

A self-locking bracket with an elastic ring lock on a working wing of the present invention includes a bracket bottom plate and a working wing disposed on the lip surface of the bracket bottom plate, the working wing including a base connected to the bracket bottom plate The central portion of the base is recessed downward to form a groove, and all the grooves are on a groove axis; the base is the first base and the second base by the groove axis; and the first base is provided with an elastic The ring lock buckle, the elastic ring lock comprises a spring piece and a free end, the elastic piece has one end fixed to the first base, the other end is connected with the free end, the elastic piece is a flexible curved piece, and the free end is suspended above the lip surface of the working wing; The card and the baffle extending in different directions are arranged on the end. When the shrapnel is in a relaxed state, the card and the groove together form an archwire slot, and the baffle blocks the archwire from the inner space enclosed by the shrapnel and the baffle. Since the elastic piece has a curved sheet-like structure, the free end is fixed to the upper surface of the self-locking bracket by the elastic piece, so that the card and the blocking piece on the free end respectively realize the closing bow Silk inlet and outlet and the function of limiting the archwire in the archwire slot. Since the card and the baffle are fixed on the free end, the card and the baffle also move simultaneously and synchronously as the shrapnel deforms under the action of the external force, thereby simultaneously closing the archwire entrance and exit and arching the archwire. Limited in the archwire slot.

The angle between the card and the flap is set to a right angle or a nearly right angle so as to fit the shape of the groove, and the card, the flap and the groove together form an archwire slot that restricts the archwire movement.

Since the end of the card and the upper portion of the first base are temporarily locked by a snap structure, the spring piece is not reset when the archwire inlet is in an open state, regardless of whether the archwire enters or exits the archwire slot, so as to prevent the card from rebounding and closing the archwire. The entrance affects the operation.

Since the free end protrudes from the inner side of the elastic piece, when the elastic piece is deformed to a certain extent, the supporting piece can support the inner side surface of the elastic piece to limit the degree of deformation of the elastic piece to protect the elastic piece from being damaged by excessive deformation. Moreover, since the card, the flap and the support piece are all connected to the same free end, the three can realize the synchronous movement, that is, simultaneously closing the archwire entrance and exit, limiting the archwire in the archwire slot, and limiting the degree of deformation of the elastic piece. DRAWINGS

1 is a schematic view showing the elastic ring lock in a relaxed state according to Embodiment 1 of the present invention;

2 is a schematic view showing the deformation of the elastic piece under the action of an external force in the embodiment 1 of the present invention. FIG. 3 is a schematic view showing the opening of the archwire opening in the first embodiment of the present invention.

Figure 4 is a schematic view showing the archwire entrance and exit of the embodiment 1 of the present invention when it is closed.

Figure 5 is a schematic view showing the second embodiment of the present invention in a state in which the elastic ring lock is in a relaxed state.

6 and FIG. 7 are schematic views showing the deformation of the elastic piece under the action of an external force in the elastic ring lock according to the embodiment 2 of the present invention, and the support piece gradually approaches the inner side surface of the elastic piece.

Figure 8 is a schematic view showing the synchronous movement of the card, the flap and the support piece according to the second embodiment of the present invention.

detailed description

The invention will now be described with reference to the accompanying drawings.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The self-locking bracket of the present invention includes a bracket bottom plate and one or more working wings, wherein the working wing package The base is connected to the bracket bottom plate, and the groove is recessed downward from the center of the top of the base to form a groove for accommodating the archwire. All the grooves of the working wing are on a groove axis. The base of the single working wing is divided by the groove into a first base on one side of the groove axis and a second base on the other side of the groove axis, and an elastic ring lock is located on the first base. The elastic ring lock is divided into a fixed end, a spring piece and a free end, and the elastic piece is a flexible curved piece structure, wherein the fixed end is fixed to the first base, and the elastic piece passes over the lip surface of the first base (ie The top of the first base is rolled up in the direction of the groove so that the cross section of the shrapnel is a semi-closed ring having a larger internal space similar to "C"; the free end is bent toward the second base, and the inside of the shrapnel The side and free ends enclose an internal space of the elastic ring lock.

The end of the free end of the elastic ring buckle projects three sheet-like members in different directions, which are respectively covering the card above the groove, blocking the arch wire from the inner space of the elastic ring lock, and preventing the elastic piece from being excessively deformed. Branch. The card is located on one side of the slot, and the support piece is located in the inner space of the elastic ring lock. The block is located between the card and the support piece, and serves as a space between the inner space of the elastic ring lock and the groove. In the relaxed state of the elastic ring lock, the end of the flap can be attached to the top of the first base or only a narrow gap, and the card and the groove together form an archwire slot for receiving the archwire.

When the self-locking bracket is used, the free end moves under the action of an external force, causing the elastic piece to deform, the blocking piece enters the inner space, and the card moves to the original position of the blocking piece to form the archwire entrance and exit, and the end of the supporting piece approaches the inner side of the elastic piece. . When the end of the tab abuts against the inner side of the shrapnel, the deformation of the shrapnel is limited to prevent the shrapnel from being damaged due to excessive deformation. Since the card, the flap and the support piece move synchronously when the free end is subjected to an external force, the function of forming the archwire entrance and exit and limiting the excessive deformation of the elastic piece is one step at a time.

Example 1

As shown in FIG. 1 , the self-locking bracket of the embodiment includes a bracket bottom plate 1 , a working wing 2 and an elastic ring buckle 3 , and each working wing 2 is provided with an elastic ring buckle 3 . The front surface of the bracket bottom plate 1 is a lip-cheek surface 11, the back surface is an adhesive surface 12, the lip-cheek surface 11 is a smooth plane, and the adhesive surface 12 is provided with a gully-like texture to facilitate the inflow of the adhesive and enhance the self-locking bracket. Bonding retention force. The working wing 2 comprises a base connected to the surface 11, and a groove 21 formed by recessing the top of the base for mounting the correction archwire, the grooves 21 of all the working wings 2 being on a groove axis. The pedestal is divided into a first pedestal 22 on one side of the groove axis and a second pedestal 23 on the other side of the groove axis by the groove 21, and the groove wall on the first pedestal 22 is the first groove wall 24, The groove wall on the second base 23 is the second groove wall 25. The elastic ring lock 3 is located on the first base 22, and the top of the second base 23 extends outwardly to form an everted flap 26. The elastic ring lock 3 is divided into a fixed end 31, a spring piece 32 and a free end 33 which are sequentially connected, wherein the fixed end 31 is fixed to the top of the first base 22, and the fixed position is biased toward the side of the top of the first base 22 away from the groove 21. , so that the elastic piece 32 is rolled up in the direction of the groove 21 over the top of the first base 22 . The outer side profile of the elastic piece 32 is similar to the air piece 26 of the second base 23, and the inner side surface of the elastic piece 32 and the top of the first base 22 enclose an inner space 34 of the elastic ring lock 3. The end of the free end 33 is provided with a card 35 and a flap 36 which are paid in different directions, and the angle between the card 35 and the flap 36 is a right angle or a substantially right angle. When the elastic ring lock 3 is in a relaxed state, the end of the card 35 can be connected to the second groove wall 25 on the second base 23 or the gap is less than 0.3 mm; when the elastic ring lock 3 is in a relaxed state, the cover piece The end of 36 can be connected to the top of the first base 22 or the gap is less than 0.3 mm to prevent the archwire from entering the inner space 34; the card 35 covers the groove 21, and the card 35 and the groove 21 are configured to accommodate The archwire of the archwire.

In this embodiment, the elastic piece 32 is preferably a curved sheet structure having a thickness of 0.05 to 2 mm. The archwire slot can be made into a rectangular space that can accommodate up to 0.018 X 0.025 inch to 0.022 X 0.028 inch archwire as needed. The working wing 2 and the elastic ring lock 3 are made of an elastic metal, and the elastic metal is a nickel-titanium shape memory alloy, a nickel-titanium shape memory alloy, a titanium-based alloy, a cobalt-chromium alloy or stainless steel. Bracket bottom plate 1, working wing 2 and elastic ring lock 3-body forming, integral forming method is metal casting, metal powder injection molding, wire cutting, laser engraving or laser cutting method.

As shown in Fig. 2, when the free end 33 is moved by an external force, the elastic piece 32 is deformed, the card 35 approaches the top of the first base 22, and the shutter 36 enters the internal space 34. As shown in Fig. 3, the card 35 reaches the original position of the flap 36, and the outer side of the card 35 and the upper portion of the second groove wall 25 together form an archwire exit 4 through which the archwire can enter the interior of the archwire slot. As shown in Fig. 4, when the archwire enters the archwire slot, the external force is withdrawn to cause the spring 32 to be reset, and the card 35 is returned to the upper of the archwire slot 21, and the archwire is locked in the archwire slot. When the archwire needs to be removed from the archwire slot, as shown in Fig. 3, an external force is applied to the free end 33 to deform the elastic piece 32. When the card 35 reaches or approaches the original position of the flap 36, the outer side of the card 35 and the second side The upper portions of the trench walls 25 together form an archwire exit 4 through which the archwire can be removed.

It can be seen that whether the archwire enters or exits the archwire slot, the archwire entrance and exit 4 needs to be opened. In order to prevent the spring 32 from being reset when the archwire inlet 4 is opened, the card 35 rebounds to close the archwire inlet 4 and affect the operation, such as As shown in Figs. 1 and 3, this embodiment also provides a flange 37 at the end edge of the card 35, and a tab 38 is provided on the top of the first groove wall 24. The flange 37 and the block 38 constitute a snap structure, and the end of the card 35 can be The top of the first furrow wall 24 is temporarily locked so that the physician can manipulate the archwire through the archwire exit 4. In order to enable the flange 37 and the block 38 to smoothly engage, the flange 37 has a certain taper, and the top of the first groove wall 34 where the block 38 is located is higher than the lip surface of the first base 22 (ie, the first base The top surface of 22).

Example 2:

As shown in Fig. 5, this embodiment differs from the first embodiment in that a sheet 39 is projected from the distal end of the free end 33 toward the inner side of the elastic piece 32. As shown in FIG. 6 and FIG. 7, when the elastic piece 32 is deformed, the end of the supporting piece 39 is closer to the inner side surface of the elastic piece until the deformation of the elastic piece 32 reaches a certain extent, and the end of the supporting piece 39 abuts against the inner side of the elastic piece 32. , the restriction shrapnel 32 continues to deform. As shown in FIG. 8, when the free end 33 is subjected to an external force and the elastic piece 32 is deformed, the card 35, the blocking piece 36, and the supporting piece 39 are synchronously moved, so that the archwire slot inlet 4 is formed, and the archwire is restricted in the archwire slot. And the function of limiting the excessive deformation of the shrapnel 32 is in one step.

As shown in FIG. 5, in order to enable easy and accurate control of opening and closing of the archwire inlet 4, in the embodiment, an operation hole 5 is disposed on a side of the support piece 39 adjacent to the inner side surface of the elastic piece 32, and is operated on the elastic piece 32. The corresponding position of the hole 5 opens an operation window 6. The physician can use the needle-like tool to urge the operation hole 5 from the lip surface (outer side) of the elastic piece 32 through the operation window 6, and apply a force to the free end 33 by the principle of the lever. The operation hole 5 is a through hole or a blind hole, and the operation window 6 is a penetrating window, and the operation window 6 has an area larger than the operation hole 5. For convenience of operation, a recess 7 may be formed at a position corresponding to the operation window 6 at the top of the second base 23.

It should be noted that the above-described embodiments may enable those skilled in the art to more fully understand the present invention, but do not limit the invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and embodiments, it will be understood by those skilled in the art that the invention may be modified or equivalently substituted. In short, all without departing from the invention. The technical solutions of the spirit and scope and their improvements shall be covered by the scope of protection of the patents of the present invention.

Claims

claims

1. A self-locking bracket, including a bracket bottom plate and working wings arranged on the labial and buccal surfaces of the bracket bottom plate. The working wings include a base connected to the bracket bottom plate, and the middle part of the base faces toward The lower depression forms a groove, and all the grooves are on a groove axis; the base is divided into a first base and a second base by the groove axis; characterized in that: the first base An elastic ring lock is provided on the top. The elastic ring lock includes a spring piece and a free end. One end of the spring piece is fixed to the first base, and the other end is connected to the free end. The elastic piece is an elastic curved piece. The free end is suspended above the lip and buccal surface of the working wing; the free end is provided with cards and baffles extending in different directions. When the elastic piece is in a relaxed state, the cards, baffles and grooves Together they form the archwire slot.

2. A self-locking bracket according to claim 1, characterized in that: when the elastic piece deforms under the action of external force, the internal space is enough to accommodate the blocking piece.

3. A self-locking bracket according to claim 1 or 2, characterized in that: when the elastic piece is in a relaxed state, the end of the card and the groove wall of the groove on the second base The end of the baffle is connected to the top of the first base or only a narrow gap is left.

4. A self-locking bracket as claimed in claim 3, characterized in that: the narrow gap is less than 0.3 mm.

5. A self-locking bracket as claimed in claim 1, 2 or 4, characterized in that: the angle between the card and the baffle is a right angle or approximately a right angle.

6. A self-locking bracket as claimed in claim 1, 2 or 4, characterized in that: the end of the card and the upper part of the first base can be temporarily locked through a buckle structure.

7. A self-locking bracket according to claim 6, characterized in that: the buckle structure includes a tapered convex edge provided on the end edge of the card and a groove provided on the first base. Block on the top of the trench wall.

8. A self-locking bracket as claimed in claim 1 or 2 or 4 or 7, characterized in that: the free end protrudes toward the inner side of the elastic piece a support for limiting the deformation degree of the elastic piece. piece.

9. The self-locking bracket according to claim 8, characterized in that: an operating hole is provided on the labial and buccal side of the support piece, and an operating hole is provided on the elastic piece at a position corresponding to the operating hole. window.

10. A self-locking bracket as claimed in claim 1 or 2 or 4 or 7 or 8, characterized in that: the working wings and elastic ring locks are made of elastic metal.

11. A self-locking bracket according to claim 10, characterized in that: the elastic metal is a nickel-titanium shape memory alloy, a nickel-titanium-based shape memory alloy, a titanium-based alloy, a cobalt-chromium alloy or stainless steel.

12. A self-locking bracket as claimed in claim 1 or 2 or 4 or 7 or 8 or 11, characterized in that: the bracket bottom plate, working wings and elastic ring lock are integrally formed, and the integrally formed The methods are metal casting, metal powder injection molding, wire cutting, laser engraving or laser cutting methods.