WO2012116611A1

WO2012116611A1 - Metallic self-ligating bracket with locking catch device on tie wing

Info

Publication number: WO2012116611A1
Application number: PCT/CN2012/071466
Authority: WO
Inventors: 黄兵民; 林琳; 张伟; 陈华; 张栋梁
Original assignee: 北京圣玛特科技有限公司
Priority date: 2011-02-28
Filing date: 2012-02-22
Publication date: 2012-09-07
Also published as: CN202069706U

Abstract

The present utility model provides a metallic self-ligating bracket with a locking catch device on a tie wing, which relates to the field of orthodontic appliance of dentistry, and comprises a base, and one or more tie wings and one or more locking catch devices disposed on one surface (lip-cheek side) of the base. The tie wings are of a symmetrical structure or approximately symmetrical structure in which a slot is disposed in the middle of a pair of wings, and all slots of the tie wings are in one axis. The locking catch device is disposed on the top of an inner side surface of the tie wing where the slot is formed, has a free end towards the axis, and has an elastic flange. The flange and the slot in the middle of the tie wings together form an arch wire concave for accommodating an arch wire. In the present utility model, according to the structure of the tie wing itself, it is only necessary to dispose a small flange on the tie wing to serve as a locking catch device to form an arch wire concave, without the need of disposing any locking catch device on the base separately, so that the structure is quite simple and materials are greatly saved.

Description

Metal self-locking bracket for working wing with locking device

Technical field

The utility model relates to the field of dental orthodontic instruments, in particular to a metal self-locking bracket with a locking device on the working wing. Background technique

Orthodontic treatment is a specialized discipline in the field of dentistry. It mainly treats teeth, jaws, and facial deformities. It gradually restores the normal occlusion function of the patient by fixing the orthodontic appliance inside the oral cavity. 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 arch wire in the groove. However, this type of fixing has the disadvantages of inconvenient clinical operation, large friction, and poor comfort. In recent years, the emergence of self-ligating bracket correction systems has introduced new methods 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 loss of anchorage, 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 consultation interval, high efficiency and shorter course of treatment. The self-locking brackets have been recognized and affirmed by more and more 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 lock-type bracket has a built-in high-elastic locking device. The elastic pressure generated after closing can act on the archwire when needed, providing continuous and gentle 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 on the metal surface of the bracket, it is convenient to use a tool or a fingertip switch, and the ligation process is simpler.

However, self-locking brackets still have some drawbacks in clinical applications. The first is that it is difficult to accurately position the self-locking brackets. This is because the shape of most types of self-locking brackets is quite different from that of the traditional double-wing brackets compared to the traditional double-wing brackets. The structure is more complicated and there are no obvious double wings, which may cause the doctor to hold the self-locking brackets, and the arc of the self-locking bracket bottom surface and the tooth surface do not match well, and it is difficult to accurately locate the self-locking bracket. . Once the position of the self-locking bracket is incorrect, it will increase the difficulty of fine adjustment in the later stage, thus prolonging the treatment time in the fine adjustment stage, which brings inconvenience to the clinical operation. Secondly, the self-locking bracket itself has certain design defects. If the sliding cover or the locking device is accidentally opened due to some unexpected factors, the control of the arch wire will be lost, which will affect the treatment effect, and the treatment time will be extended. 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 slide or the locking device to be unable to open and close, in severe cases Even the brackets are scrapped, which increases the economic burden on patients and increases the cost of treatment.

The self-locking device of the self-locking bracket usually occupies a large space on the tooth surface, so that the thickness of the self-locking bracket is large, and may fall off during chewing, which has limitations on the use of children with poor compliance and deep overbite. At the same time, because the bracket groove of the self-locking bracket is short and blunt, the retention is inconvenient and slippery when adding the ligation attachment, and in the process of inserting the archwire and removing the archwire, the self-locking bracket and the traditional double wing support The slot is extremely uncomfortable and often causes pain in the patient. In addition, when adjusting individual teeth with curved stainless steel square wires, it is difficult to close the slide or lock device, which limits the use of traditional fine adjustment methods.

The applicant's patent number is 201020507699.8, and the utility model patent application entitled "A whole metal self-locking bracket with a locking device" proposes a working wing and a locking device with an integral molding, which is very good The above problem is solved, and the archwire can be conveniently fixed in the arching groove formed by the groove of the working wing and the hollow part of the locking device, and has good clamping force and fixing force, and can withstand several times of clinical archwire Metal self-locking bracket for loading and unloading without deformation.

However, since the above patent is a locking device additionally combined on the substrate, the manufacturing cost is not changed much compared with the prior art, and the competitiveness of the product is still not prominent in the market where the cost is minimized. Utility model content

The utility model aims at the deficiencies of the prior art, and provides a metal self-locking bracket with a working wing self-locking device, which has the advantages of low manufacturing cost and simple structure, and the locking device and the working wing are integrated.

The technical scheme of the utility model is as follows:

A metal self-locking bracket for a working wing self-locking device, comprising a base, and one or more working wings disposed on one side (bath side) of the base, and one or more locking devices, The working wing is a symmetrical structure or an approximately symmetrical structure in which a groove is disposed in a middle of a wing, and all the grooves of the working wing are on one axis; the locking device is disposed in the groove formed by the working wing. The top of the side, the free end thereof faces the axis, has an elastic flange which, together with the groove in the middle of the working wing, forms an archwire slot for receiving the archwire.

The utility model relates to a metal self-locking bracket with a locking device, wherein the inner wall surface comprises a vertical surface and a curved surface of the top of the vertical surface connected to the span, the flange is disposed on the curved surface And / or on the top of the vertical face.

The working wing has a metal self-locking bracket with a locking device, the working wing and the locking device are integrally formed, and the integral working body is made of metal casting and metal for the working wing and the locking device. Powder injection molding, wire cutting laser engraving Or the laser cutting method is made into a unitary structure.

The utility model relates to a metal self-locking bracket with a locking device, and the material of the working wing and the locking device is a nickel-titanium shape memory alloy, a nickel-titanium shape memory alloy, a titanium-based alloy and a cobalt-chromium alloy. Or stainless steel.

The working wing has a metal self-locking bracket with a locking device, the flange is a longitudinal arm extending from the inner side wall facing the free end, and gradually shrinks toward the free end to form an arm tip, The top of the arm tip is a circular arc that converges toward the end of the arm tip.

The working wing has a metal self-locking bracket with a locking device, and the flange is at least two, and the inner wall surfaces on both sides of the axis are respectively disposed.

The working wing has a metal self-locking bracket with a locking device, and the flange is symmetrically disposed on two opposite inner side walls of the same working wing on both sides of the axis, or respectively disposed on different The working wings are respectively located on the inner side wall surfaces on both sides of the axis, or are respectively disposed on the inner side wall surfaces of the two opposite inner side wall surfaces on the same working wing on the two sides of the axis.

The utility model relates to a metal self-locking bracket with a locking device, and the flange is at least two, which are respectively disposed on inner wall faces of different working wings on the same side of the axis.

The utility model relates to a metal self-locking bracket with a locking device, the working wing and the locking device and the base are integrally formed, and the integral forming is adopted for the working wing, the locking device and the base. Metal casting, metal powder injection molding, wire cutting laser engraving or laser cutting methods are integrated into one structure.

The utility model relates to a metal self-locking bracket with a locking device, and the material of the base, the working wing and the locking device is a nickel-titanium shape memory alloy, a nickel-titanium shape memory alloy, a titanium-based alloy, a cobalt Chrome or stainless steel. The technical effects of the utility model are as follows:

The utility model has an elastic flange which is directly disposed on the top of the inner wall surface of the working wing, so that the locking device is not separately provided on the base, and the structure of the working wing itself is skillfully A small flange is provided as a locking device to form an archwire slot, the structure is very simple, and the material is greatly saved, but the function is the same as the patent of the right holder of 201020507699.8, which can effectively clamp the archwire to the bow. In the wire groove, the meshing is stable, and the orthodontic force of the arch wire is fully exerted. Compared with the patent, the volume of the metal self-locking bracket is further reduced, so that the wearing feeling of the patient is more comfortable.

At the same time, as with the Patent No. 201020507699.8 of the patentee, since the locking device of the present invention is integrally formed with the working wing, there is no movable hinge structure commonly used in the gland type self-locking bracket, so that there is almost no sanitary corner and easy to clean. . Moreover, the locking device has the advantages of stability and elasticity, can withstand the clinical loading and unloading of the archwire without deformation, and maintains good clamping and retaining force. The elastic pressure generated after the locking device is closed can act on the archwire when needed, providing continuous gentleness Orthodontic force.

DRAWINGS

Figures la and lb are schematic views of the structures of the first and second embodiments of the present invention;

2a and 2b are respectively schematic structural views of Embodiments 3 and 4 of the present invention;

3a and 3b are cross-sectional views perpendicular to the axis of the present invention provided with locking devices on both sides of the axis; Figs. 4a and 4b are respectively schematic views of the structures of the embodiments 5 and 6 of the present invention;

5a and 5b are respectively schematic structural views of Embodiments 7 and 8 of the present invention;

6a and 6b are respectively schematic structural views of Embodiments 9 and 10 of the present invention;

7a and 7b are respectively schematic structural views of Embodiments 11 and 12 of the present invention;

8a and 8b are respectively schematic structural views of Embodiments 13 and 14 of the present invention;

detailed description

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

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, 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.

Example 1, 2:

Embodiment 1, as shown in FIG. 1a, is a preferred embodiment, the self-ligating bracket of this embodiment includes a base 1, two working wings 2, and four locking devices 3, and the locking device 3 is disposed on the working wing 2 The top of the inner side surface of the axis, the flange whose free end faces the axis, and the flange 3 are integrally formed with the working wing 2, and the manufacturing method adopts an integral forming method of metal casting, metal powder injection molding, wire cutting, and the like. The flange 3 and the working wing 2 are made of a metal material as a whole, such as a nickel-titanium-based shape memory alloy, a titanium-based alloy, a cobalt-chromium alloy, a stainless steel or the like. The substrate 1 has a rectangular plate shape, the front surface of the substrate 1 is a surface 11, the back surface is an adhesive surface 12, the surface 11 is a smooth surface, and the adhesive surface 12 is provided with a groove-like groove 13 to facilitate the inflow of the adhesive and enhance The retention force of the bracket bonding. The working wing 2 includes a bottom bracket 21 connected to the surface 11, and the top of the bottom bracket 21 is downwardly recessed to form a groove 22 for mounting the correction arch wire, and the two side walls of the groove 22 extend outward to form an everted flap 23, and The working wing 2 is a symmetrical or approximately symmetrical structure in which a groove is provided in the middle of a pair of fins 23. The grooves 22 of all the working wings 2 are on one axis; the grooves 22 of the two working wings 2 are on the same axis. The sidewalls of the grooves 22 are parallel or approximately parallel to each other and are perpendicular or nearly perpendicular to the surface 11.

Embodiment 2 As shown in FIG. 1b, compared with Embodiment 1 of FIG. 1, Embodiment 2 forms a flange directly on the top of both side walls of the groove 22, that is, the top of the inner side surface of the working groove 2 constituting the groove 22, and the top of the flange The height does not exceed the top surface of the flap 23. Implementation The top height of the flange of Example 1 exceeded the top surface of the flap 23.

As shown in Figures 3a and 3b, the single latching device 3 comprises a trailing arm 31 and an arm tip 32, the trailing arm 31-end being connected to the flap 23, at the top of the inner side of the working wing 2 near the axis, and the other end being a free end. , facing the axis of the groove 22, and extending laterally, forming an arm tip 32 at the end. Two locking means 3, which are arranged symmetrically at the top of the inner side, have an inner edge facing the axis of the groove 22 and the groove 22 of the two working wings 2 together form a rectangular archwire slot 4 for receiving the archwire. The archwire slot 4 can be made into a rectangular space that can accommodate up to 0.018 X 0.025 inches to 0.022 X 0.028 inches of archwires. The top of the arm tip 32 is a circular arc that converges toward the end of the arm tip 32. When the archwire is pressed from the outside, the archwire is naturally smoothly pressed into the archwire slot 4 from the end of the arm tip 32. When the archwire enters the archwire slot 4, the locking device 3 can be quickly restored to its original shape, so that the armtip 32 effectively engages the archwire in the archwire slot 4 to exert a corrective force. The difference between Figures 3a and 3b is also that the top height of the flange in Figure 3a exceeds the top surface of the flap 23, and Figure 3b does not.

As shown in FIG. 1a and FIG. 1b, there are two working wings 2 in the first and second embodiments, and two locking devices are arranged correspondingly, and two locking devices 3 of each group are symmetrically disposed in the groove. The same working wing on both sides of the 22 axis is located at the top of the inner side of the two sides of the axis, and each set is respectively disposed on the end of the top of the inner side. Embodiments 3 and 4 of Figs. 2a and 2b are four such structures. Two sets of each working wing are provided, and each set is respectively disposed on two ends of the top of the inner side of the working wing. In the relaxed state, the gap between the arm tips 32 of the two opposing latching means 3 forms the entrance of the archwire slot 4. Viewed from the direction of the axis of the groove 22, the entrance of the archwire slot 4 has a rounded "V" shape. After the archwire is pressed from the outside, the two opposite arm tips 32 are easily separated, and the archwire is extended from the bow. The inlet of the wire groove 4 is smoothly pressed into the archwire groove 4. The hollow portion of the two locking devices 3 facing the inner edge of the axis and the groove 22 formed on the inner side of the working wing is an archwire slot 4, and the side view shape of the archwire slot 4 is similar to the opening upward "C "shape. The locking device 3 can not only control and clamp the archwire, but also effectively prevent the archwire from ejecting from the archwire slot 4 within a certain range of force values. When the archwire enters the archwire slot 4 and the force is too large, the locking device 3 will be separated in the opposite direction by the pulling force, and the archwire is ejected from the archwire slot 4, thereby protecting the teeth from excessive orthodontic damage. And avoiding the self-locking bracket from falling off from the fixed position due to excessive force. The difference between Fig. 2a and Fig. 2b is the same as that of Figs. la and lb. Embodiments 5, 6, 7, and 8: As shown in Figs. 4a, 4b, 5a, and 5b, respectively, on the basis of Embodiments 1 and 2, the self-ligating brackets of these embodiments will follow the groove 22. The locking device 3, which is symmetrically arranged in the axial direction, is changed to an asymmetrical arrangement, that is, the locking device 3 on the axial side of the groove 22 is offset from the locking device 3 on the other side, so that the locking devices 3 on both sides are not Further, the axis of the groove 22 is symmetrical. Figure 4 a and Figure 4b are two sets of asymmetric structures, each set on the same working wing 2, but at the different ends of the top of the inner side; Figure 5 is a set of asymmetric structures, the two locking devices 3 are located respectively On the working wing 2, the hollow portion of the two locking devices 3 of each group facing the axis of the groove 22 and the groove 22 is located as an archwire slot 4 for mounting the archwire, and the archwire slot 4 The side viewing surface is shaped like a notched "C" shape. The locking device 3 can It is enough to control and clamp the archwire, effectively preventing the archwire from popping out from the archwire slot 4 within a certain range of force values. When the archwire enters the archwire slot 4 and the force is too large, the locking device 3 will be separated in the opposite direction by the pulling force, and the archwire is ejected from the archwire slot 4, thereby protecting the teeth from excessive orthodontic damage. And avoiding the self-locking bracket from falling off from the fixed position due to excessive force. The difference between Fig. 4a and Fig. 4b, the difference between Fig. 5a and Fig. 5b is the same as that of Figs. la and lb. Embodiments 9 and 10: As shown in FIG. 6a and FIG. 6b, respectively, N locking devices 3 (N is a natural number) in this embodiment are distributed on the same side of the axis of the groove 22, and N locking devices 3 Distributed along the axis. In the relaxed state, the gap between the arm point 32 of the locking device 3 and the inner side of the tab 23 opposite thereto that faces the axis of the groove 22 forms the entrance of the archwire slot 4. As seen from the direction of the axis of the groove 22, the entrance of the archwire slot 4 is rounded, the arm tip 32 is easily bent to the inner side (lingual side), and the archwire is smoothly pressed into the archwire slot from the entrance of the enlarged archwire slot 4. 4 in. The locking device 3 is integrally connected with the flap 23 at the bottom of the trailing arm 31, and the hollow portion of the locking device 3 facing the inner edge of the axis and the groove 22 is an archwire slot ₄ , the side of the archwire slot 4 The shape of the viewing surface approximates the "C" shape of the opening upward. The locking device 3 can not only control and clamp the archwire, but also effectively prevent the archwire from automatically ejecting from the archwire slot 4 within a certain range of force values. When the force of the archwire enters the archwire slot 4 is too large, the locking device 3 will deform in the opposite direction under the action of the pulling force, and the archwire is ejected from the archwire slot 4, thereby protecting the teeth from excessive orthodontic damage. And avoiding the self-locking bracket from falling off from the fixed position due to excessive force. The difference between 6a and 6b is the same as that of Figures la and lb. Examples 11, 12:

As shown in FIG. 7a and FIG. 7b, respectively, N locking devices 3 (N is a natural number) in this embodiment are asymmetrically distributed with respect to the axis of the groove 22, and N locking devices 3 are distributed along the axial direction, one of which The working wing 2 is provided with three locking devices 3, two of which are located on the same axis side; the other working wing 2 is provided with two locking devices 3, which are respectively located on both sides of the axis. In the relaxed state, the gap between the arm tips 32 of the latching means 3 on either side of the axis of the slot 22 forms the entrance of the archwire slot 4. When viewed from the direction of the axis of the groove 22, the entrance of the archwire slot 4 is a rounded "V" shape. After the archwire is pressed from the outside, the arm tip 32 is easily bent to the inner side (lingual side), and the archwire is bent. The entrance of the enlarged archwire slot 4 is smoothly pressed into the archwire slot 4. The hollow portion of the locking device 3 facing the inner edge of the axis and the groove 22 is an archwire slot 4, and the side view surface shape of the archwire slot 4 approximates the "C" shape of the opening upward. The locking device 3 can not only control and clamp the archwire, but also effectively prevent the archwire from ejecting from the archwire slot 4 within a certain range of force values. When the archwire enters the archwire slot 4 and the force is too large, the locking device 3 will be separated in the opposite direction by the pulling force, and the archwire is ejected from the archwire slot 4, thereby protecting the teeth from excessive orthodontic damage. And avoiding the self-locking bracket from falling off from the fixed position due to excessive force. Figures 7a and 7b are identical to the differences between Figures la and lb. Embodiments 13 and 14, respectively, see Figs. 8a and 8b, respectively, there are two sets of locking devices 3, each set being symmetrically disposed at the center of the top of the inner side of one of the working wings 2, and the flange 3 (locking device) of Fig. 8a is set. At the top of the inner side of the working wing 2 and at the top of the flap 23, its function and function are the same as in the previous embodiment. The flange 3 (locking device) of Fig. 8b corresponds to the extension of the top of the inner side of the working wing 2 to the axis, the highest point of which is flat with or lower than the top of the flap 23.

Of course, the inner side wall surface may further comprise a vertical surface and a curved surface at the top of the vertical surface connected to the upper portion of the span, wherein the flange 3 (locking means) may be disposed on the top of the vertical surface and/or the top of the curved surface.

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 creation of the present invention in any way. Therefore, although the present specification has been described in detail with reference to the accompanying drawings and embodiments, it will be understood by those skilled in the art that the present invention may be modified or equivalently replaced. In short, everything does not deviate from the utility. The technical solutions and improvements of the spirit and scope of the new creation shall be covered by the scope of protection of the patents created by the present invention.

Claims

WO 2012/116611 Claim PCT/CN2012/071466

A metal self-locking bracket for a working wing with a locking device, comprising a base, and one or more working wings disposed on one side of the base, and one or more locking devices, said The wing is provided with a symmetrical or approximately symmetrical structure of a groove in the middle of a wing, and the grooves of all the working wings are on one axis; and the locking device is disposed in the groove formed by the working wing The top of the side, the free end thereof faces the axis, has an elastic flange which, together with the groove in the middle of the working wing, forms an archwire slot for receiving the archwire.

2 . The metal self-locking bracket of the working wing self-locking device according to claim 1 , wherein the inner wall surface comprises a vertical surface and a curved surface of the top of the vertical surface connected to the span. The flange is disposed on the top of the curved surface and/or the vertical surface.

The metal self-locking bracket of the working wing self-locking device according to claim 1 or 2, wherein the working wing and the locking device are integrally formed, and the integral molding is The working wing and the locking device are integrally formed by metal casting, metal powder injection molding, wire cutting laser engraving or laser cutting.

The metal self-locking bracket of the working wing self-locking device according to claim 1 or 2, wherein the working wing and the locking device are made of nickel-titanium shape memory alloy and nickel-titanium. Base shape memory alloy, titanium based alloy, cobalt chrome alloy or stainless steel.

The metal self-locking bracket of the working wing self-locking device according to claim 1 or 2, wherein the flange is a longitudinal arm extending from the inner side wall toward the free end, and The arm tip is gradually contracted toward the free end, and the top of the arm tip is a circular arc that converges toward the tip end of the arm.

The metal self-locking bracket of the working wing self-locking device according to claim 5, wherein the flange is at least two, and the inner wall surfaces on both sides of the axis are respectively disposed.

The metal self-locking bracket of the working wing self-locking device according to claim 5, wherein the flange is symmetrically disposed on two opposite inner sides of the same working wing on both sides of the axis The wall faces are respectively disposed on the inner side wall surfaces of the different working wings on the two sides of the axis, or respectively disposed on the inner side wall surfaces of the two opposite inner side wall surfaces on the same working wing on the two sides of the axis.

The metal self-locking bracket of the working wing self-locking device according to claim 5, wherein the flanges are at least two, respectively disposed on different working wings at the same axis The inner side wall of the side.

The metal self-locking bracket of the working wing self-locking device according to claim 5, wherein the working wing and the locking device and the base are integrally formed, and the integral molding is The working wing, the locking device and the base are integrally formed by metal casting, metal powder injection molding, wire cutting laser engraving or laser cutting.

10 . The metal self-locking bracket of the working wing self-locking device according to claim 5 , wherein the base, the working wing and the locking device are made of nickel-titanium shape memory alloy and nickel-titanium. Base shape memory alloy, titanium based alloy, cobalt chrome alloy or stainless steel.