An orthodontic self-ligating bracket with an open auxiliary groove

Abstract

The present invention relates to an orthodontic self-locking bracket with an open auxiliary groove, comprising a groove body, a base is provided at the bottom of the groove body, a main groove is arranged in the groove body, and the main groove is adapted to arrange a thick arch wire; an auxiliary groove is arranged on one side of the main groove and is adapted to arrange a thin arch wire; an elastic baffle is arranged between the main groove and the auxiliary groove to separate the main groove and the auxiliary groove; a self-locking cover plate is arranged above the auxiliary groove and the main groove, and the self-locking cover plate can be opened or closed; an extrusion member is used to be inserted into the auxiliary groove to cause the elastic baffle to elastically deform towards the main groove. The present invention enables the bracket to have two different grooves. Physicians can arrange the thin arch wire in the auxiliary groove according to needs, so that the thin arch wire can be precisely aligned through the auxiliary grooves of adjacent brackets, simply and efficiently replacing the horizontal tube of the existing self-locking bracket; when the thick arch wire is arranged in the main groove, the extrusion member is used to squeeze the elastic baffle to deform to eliminate the clearance between the thick arch wire and the main groove.

Description

Technical Field

[0001] The present invention relates to an orthodontic self-locking bracket with an open auxiliary groove. Background Art

[0002] Currently, existing orthodontic brackets can be classified into two categories, traditional ligature brackets and self-locking brackets, according to the clinical ligation method. The self-locking bracket replaces the traditional ligation operation through the self-locking structure of the bracket, reduces the friction between the bracket groove and the arch wire, and has the advantages of convenient and efficient clinical operation, gentle orthodontic force, and fast tooth movement.

[0003] Orthodontic treatment can be roughly divided into two stages according to the thickness of the arch wire used. The first stage is to use a thin arch wire to act on the bracket groove of the teeth to align and level the teeth. The second stage is to use a thick arch wire to control the root of the teeth so that the teeth obtain ideal torque, axial inclination, and position, taking into account both function and aesthetics. The common self-locking brackets on the market at present have the following defects: 1. When the teeth need to be slightly rotated and corrected, it is not necessary for the arch wire to provide a large force. Therefore, a thin arch wire is generally used in the self-locking bracket. However, because the groove size of the self-locking bracket is much larger than the diameter of the thin arch wire, there is a large gap between the thin arch wire and the groove, resulting in difficulty in correcting tooth rotation. Therefore, a thinner horizontal tube is generally set on the self-locking bracket. After the highly elastic thin arch wire enters the thin horizontal tube, it is beneficial to correct tooth rotation. However, the setting of the horizontal tube requires additional space, which will increase the volume and structural cost of the self-locking bracket. Most importantly, because the horizontal tube is thin, it is time-consuming and laborious to thread the arch wire during clinical operation; 2. When a thick arch wire is used in the self-locking bracket, the thick arch wire is placed in the groove of the bracket. The size of the thick arch wire must be smaller than the groove size (because a full-size arch wire is difficult to completely enter the groove, or the orthodontic force is too large), which inevitably results in a clearance between the inner wall of the groove and the thick arch wire. Even with an elastic self-locking cover structure, the clearance cannot be eliminated, which will directly affect the accurate expression of the preset data of the bracket and the orthodontic treatment process and effect. Summary of the Invention

[0004] The present invention provides an orthodontic self-locking bracket with an open auxiliary groove. Its structural design is reasonable. An elastic baffle is arranged in the bracket groove. One side is the main groove, and the other side is the auxiliary groove, which can be used to set thick arch wires and thin arch wires respectively, enabling the bracket to give full play to its strengths and avoid its weaknesses and being convenient to operate at different stages of orthodontic treatment. When a dentist sets a thin arch wire in the auxiliary groove, through the elastic baffle and the self-locking cover plate structure, the thin arch wire can be precisely aligned and the torsion corrected through the auxiliary grooves of adjacent brackets. By replacing the horizontal tube structure in the existing self-locking bracket with an open auxiliary groove, the volume of the bracket is effectively reduced (reducing the discomfort of patients), the processing and structural costs are reduced, and most importantly, it is convenient for clinical operation without the trouble of threading the arch wire into the horizontal tube. When it is necessary to set a thick arch wire in the main groove, first, an extrusion piece is inserted into the auxiliary groove, and the extrusion piece squeezes the elastic baffle from one side of the auxiliary groove to reduce the size of the main groove. Then, an arch wire placement device is used to set the thick arch wire in the main groove with a reduced size, and the elastic deformation extrusion of the elastic baffle is used to eliminate the clearance between the thick arch wire and the main groove, enabling the teeth to obtain ideal torque, axial inclination, and position, and improving the orthodontic effect of the teeth. The bracket is ingeniously designed with a simple structure, and the clinical operation of the dentist is concise and efficient, solving the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an orthodontic self-locking bracket with an open auxiliary groove, comprising:

[0006] a groove body, a base is arranged at the bottom of the groove body, and the base is adapted to abut against the teeth;

[0007] a main groove, the main groove is arranged in the groove body, and the main groove is adapted to set a thick arch wire;

[0008] an auxiliary groove, the auxiliary groove is arranged on one side of the main groove, adapted to set a thin arch wire, and the direction of the auxiliary groove is the same as that of the main groove;

[0009] an elastic baffle, the elastic baffle is arranged between the main groove and the auxiliary groove to separate the main groove and the auxiliary groove, and the elastic baffle abuts against the thick arch wire or the thin arch wire;

[0010] a self-locking cover plate, the self-locking cover plate is arranged above the auxiliary groove and the main groove, the self-locking cover plate can be opened or closed, and after the self-locking cover plate is closed, it can limit the thick arch wire or the thin arch wire from passing through the position of the self-locking cover plate;

[0011] an extrusion piece, the extrusion piece is used to be inserted into the auxiliary groove to make the elastic baffle elastically deform towards the main groove direction to squeeze the thick arch wire in the main groove and limit the movement of the thick arch wire in the main groove.

[0012] Further, the depth of the auxiliary groove is less than that of the main groove, so that a step is formed at the adjacent position of the auxiliary groove and the main groove, and the lower side surface of the elastic baffle is connected to the step.

[0013] Further, a slot is provided on one side of the auxiliary groove close to the elastic baffle. The width dimension of the slot does not exceed 1 / 2 of the width dimension of the auxiliary groove. The extrusion member is provided with a plug-in portion, and the plug-in portion can be inserted into the slot to cause the elastic baffle to elastically deform towards the main groove.

[0014] Further, the extrusion member is set as an extrusion arch wire. The extrusion arch wire adopts a circular arch wire structure, and the diameter dimension of the circular arch wire is greater than the width of the auxiliary groove. After the extrusion arch wire is placed, the elastic baffle can be elastically deformed towards the main groove side.

[0015] Further, the extrusion member is set as a wedge block. The length of the wedge block is not greater than the distance between the bottom surface of the slot and the self-locking cover plate after closing. After the plug-in portion of the wedge block is inserted into the slot, the wedge block in the auxiliary groove can abut against the elastic baffle and the inner side wall of the auxiliary groove, so that the top of the elastic baffle forms a bending inclination towards the thick arch wire side to limit the movement of the thick arch wire along the depth and width directions of the main groove.

[0016] Further, after the wedge block is inserted into the auxiliary groove and the slot, the end portion thereof close to the self-locking cover plate is set as an arc to avoid interference between the extrusion member and the self-locking cover plate.

[0017] Further, the side wall of the elastic baffle facing the main groove is set as an inclined surface. The inclined surface of the elastic baffle makes the bottom area of the elastic baffle larger than the top area of the elastic baffle. After the elastic baffle is squeezed and deformed, the elastic baffle can form an abutting and limiting state on the two right-angle positions of the side wall of the thick arch wire.

[0018] Further, a reinforcing groove is provided at the position of the main groove close to the step. The reinforcing groove is suitable for the bottom of the elastic baffle to extend and be inserted.

[0019] Further, the outer side of the groove body is set as an arc surface, so that the groove body forms a spherical groove structure. A ligature groove is provided at the position of the outer side of the groove body close to the base. The opening direction of the ligature groove is the same as the direction of the main groove, and two ligature grooves are provided on both sides of the main groove respectively, which are suitable for bundling ligature wires.

[0020] Further, a traction member is provided on one side of the groove body, and the traction members between adjacent groove bodies can be connected to each other.

[0021] Furthermore, the thin arch wire is respectively abutted against the side wall of the auxiliary groove and the elastic baffle. The depth dimension between the bottom surface of the auxiliary groove and the self-locking cover plate is greater than the diameter dimension of the thin arch wire and does not exceed twice the diameter dimension of the thin arch wire, enabling the thin arch wire to move limitedly along the depth direction of the auxiliary groove.

[0022] The beneficial effects of the present invention adopting the above structure are as follows: An elastic baffle is arranged in the bracket groove. On one side is the main groove, and on the other side is the auxiliary groove, which can be respectively used to arrange the thick arch wire and the thin arch wire, enabling the bracket to give full play to its strengths and avoid weaknesses and being convenient to operate at different stages of orthodontic treatment. When the dentist arranges the thin arch wire in the auxiliary groove, the elastic baffle and the self-locking cover plate structure enable the thin arch wire to be precisely aligned and correct torsion through the auxiliary grooves of adjacent brackets. By replacing the horizontal tube structure in the existing self-locking brackets with an open auxiliary groove, the volume of the bracket is effectively reduced (reducing the discomfort of patients), reducing processing and structural costs. Most importantly, it is convenient in clinical operation without the trouble of threading the arch wire into the horizontal tube; when it is necessary to arrange the thick arch wire in the main groove, first insert an extrusion piece into the auxiliary groove, and the extrusion piece squeezes the elastic baffle from one side of the auxiliary groove to reduce the size of the main groove, and then use an arch wire positioner to arrange the thick arch wire in the main groove with a reduced size. The deformation extrusion of the elastic baffle eliminates the clearance between the thick arch wire and the main groove, enabling the teeth to obtain ideal torque, axial inclination, and position, improving the orthodontic effect of the teeth; the bracket is ingeniously designed with a simple structure, and the dentist's clinical operation is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic side view structure diagram of the present invention.

[0024] Figure 2 It is a schematic side view structure diagram of the present invention after installing the thin arch wire.

[0025] Figure 3 It is a structure diagram of the present invention after installing the extrusion arch wire and the thick arch wire.

[0026] Figure 4 It is a schematic side view structure diagram of the present invention after installing the wedge block and the thick arch wire.

[0027] Figure 5 It is a structure diagram of the present invention after setting the reinforcement groove and installing the thin arch wire.

[0028] Figure 6 It is a structure diagram of the present invention after setting the reinforcement groove and installing the extrusion arch wire and the thick arch wire.

[0029] Figure 7 It is a structure diagram of the present invention after setting the reinforcement groove and installing the wedge block and the thick arch wire.

[0030] Figure 8 This is a schematic side view of the state of the traction member provided by the present invention.

[0031] Figure 9 This is a schematic diagram of the structure of the present invention when applied to the lingual side in combination with the base.

[0032] In the figure, 1 is a groove body; 2 is a base; 3 is a main groove; 4 is a thick arch wire; 5 is an auxiliary groove; 6 is a thin arch wire; 7 is an elastic baffle; 8 is a self-locking cover plate; 9 is an extrusion member; 901 is an extrusion arch wire; 902 is a wedge block; 10 is a slot; 11 is a reinforcement groove; 12 is a ligation groove; 13 is a traction member. Detailed implementation manners

[0033] To clearly illustrate the technical features of this solution, the present invention will be elaborated in detail below through specific implementation manners and in conjunction with its drawings.

[0034] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0035] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0037] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] As Figures 1-9 shown, an orthodontic self-locking bracket with an open auxiliary groove includes a groove body 1. A base 2 is provided at the bottom of the groove body 1, and the base 2 is adapted to abut against the tooth. A main groove 3 is arranged in the groove body 1, and the main groove 3 is adapted to arrange a thick arch wire 4. An auxiliary groove 5 is arranged on one side of the main groove 3, which is adapted to arrange a thin arch wire 6, and the direction of the auxiliary groove 5 is the same as that of the main groove 3. An elastic baffle 7 is arranged between the main groove 3 and the auxiliary groove 5 to separate the main groove 3 and the auxiliary groove 5, and the elastic baffle 7 abuts against the thick arch wire 4 or the thin arch wire 6. A self-locking cover plate 8 is arranged above the auxiliary groove 5 and the main groove 3. The self-locking cover plate 8 selects an existing technical product. The self-locking cover plate 8 can be opened or closed, and after the self-locking cover plate 8 is closed, it can limit the thin arch wire 6 or the thick arch wire 4 from passing through the position of the self-locking cover plate 8. It also includes a pressing member 9. The pressing member 9 is used to be inserted into the auxiliary groove 5 to cause the elastic baffle 7 to elastically deform towards the main groove 3, so as to press the thick arch wire 4 in the main groove 3 and limit the movement of the thick arch wire 4 in the main groove 3. When in use, when a doctor sets the thin arch wire 6 in the auxiliary groove 5, the thin arch wire can be precisely aligned and the torsion corrected through the elastic baffle 7 and the self-locking cover plate 8 structure by passing through the auxiliary groove 5 of the adjacent bracket. The open auxiliary groove 5 replaces the horizontal tube structure in the existing self-locking bracket, effectively reducing the volume of the bracket (reducing the discomfort of the patient), reducing the processing and structural costs. Most importantly, it is convenient for clinical operation without the trouble of threading the arch wire into the horizontal tube. When it is necessary to set the thick arch wire 4 in the main groove 3, first use a pressing member 9 to be inserted into the auxiliary groove 5. The pressing member 9 presses the elastic baffle 7 from one side of the auxiliary groove 5 to reduce the size of the main groove 3, and then use an arch wire positioner to set the thick arch wire 4 in the main groove 3 with a reduced size. The deformation extrusion of the elastic baffle 7 is used to eliminate the clearance between the thick arch wire 4 and the main groove 3, so that the tooth obtains an ideal torque, axial inclination, and position, improving the orthodontic effect of the tooth. The bracket is ingeniously designed with a simple structure, and the doctor's clinical operation is simple and efficient.

[0040] In a preferred embodiment, the depth of the auxiliary groove 5 is less than that of the main groove 3, so that a step is formed at the adjacent position of the auxiliary groove 5 and the main groove 3, and the lower side surface of the elastic baffle 7 is connected to the step. In order to reduce the clearance of the thin arch wire 6 in the auxiliary groove 5 and avoid excessive movement of the thin arch wire 6, which reduces the positioning effect, the depth of the auxiliary groove 5 is made less than that of the main groove 3. Furthermore, a step is formed between the auxiliary groove 5 and the main groove 3, and the elastic baffle 7 is just arranged at the step position, which can increase the connection reliability of the elastic baffle 7.

[0041] In a preferred embodiment, a slot 10 is provided on one side of the auxiliary groove 5 close to the elastic baffle 7. The width dimension of the slot 10 does not exceed 1 / 2 of the width dimension of the auxiliary groove 5. The extruding member 9 is provided with a plugging portion 901, and the plugging portion 901 can be inserted into the slot 10 to cause the elastic baffle 7 to elastically deform towards the main groove 3. In order to ensure sufficient extrusion of the elastic baffle 7 by the extruding member 9, the slot 10 is provided to avoid the problem that the contact surface between the extruding member 9 and the elastic baffle 7 is too small due to the insufficient depth of the auxiliary groove 5, resulting in insufficient deformation of the elastic baffle 7, and to strengthen the extrusion deformation ability of the extruding member 9 on the elastic baffle 7.

[0042] In a preferred embodiment, as shown in the appendix Figure 3 As shown, the extruding member 9 is set as an extrusion arch wire 901. The extrusion arch wire 901 adopts a circular arch wire structure, and the diameter dimension of the circular arch wire is larger than the width of the auxiliary groove 5. After the extrusion arch wire 901 is placed, the elastic baffle 7 can be elastically deformed towards the main groove 3. Directly using the common circular arch wire in the clinical field to extrude the elastic baffle 7, taking materials locally, is convenient to use, does not require the design of additional accessories, and effectively controls the cost.

[0043] In an alternative embodiment, as shown in the appendix Figure 4 As shown, the extruding member 9 is set as a wedge block 902. The length of the wedge block 902 is not greater than the distance between the bottom surface of the slot 10 and the self-locking cover plate 8 after closing. After the plugging portion of the wedge block 902 is inserted into the slot 10, the wedge block 902 in the auxiliary groove 5 can abut against the elastic baffle 7 and the inner side wall of the auxiliary groove 5, so that the top of the elastic baffle 7 forms a bending inclination towards the thick arch wire 4 to limit the movement of the thick arch wire 4 along the depth and width directions of the main groove 3.

[0044] In a preferred embodiment, as shown in the appendix Figure 3As shown, the side wall of the elastic baffle 7 facing one side of the main groove 3 is set as an inclined surface. The inclined surface of the elastic baffle 7 makes the bottom area of the elastic baffle 7 larger than the top area of the elastic baffle 7. After the elastic baffle 7 is squeezed and deformed, the elastic baffle 7 can form a contact and restriction state on two right-angle positions on the side wall of the thick arch wire 4. In this embodiment, after the elastic baffle 7 is squeezed by the squeezing member 9, the upper part of the elastic baffle 7 is squeezed by the squeezing member 9 and bends towards the main groove 3, so that a certain position of the upper part of the elastic baffle 7 comes into contact with the corresponding right-angle part of the thick arch wire 4 to restrict the movement of the thick arch wire 4. At the same time, the bottom of the elastic baffle 7 can form a contact with the bottom right-angle part of the side wall of the thick arch wire 4 to further restrict the movement of the thick arch wire 4.

[0045] In a preferred embodiment, as shown in the attached Figures 4-7 figure, a reinforcing groove 11 is provided near the step position of the main groove 3, and the reinforcing groove 11 is suitable for the bottom of the elastic baffle 7 to extend and insert. In order to further improve the connection reliability of the elastic baffle 7 and avoid the problem of the bottom of the elastic baffle 7 shifting after being squeezed, the reinforcing groove 11 is provided so that the bottom of the elastic baffle 7 extends and is arranged in the reinforcing groove 11, improving the connection reliability of the elastic baffle 7.

[0046] In a preferred embodiment, the outer side of the groove body 1 is an arc surface, so that the groove body 1 forms a spherical groove structure. A ligature groove 12 is provided near the base 2 on the outer side of the groove body 1. The opening direction of the ligature groove 12 is the same as the direction of the main groove 3, and two ligature grooves 12 are provided on both sides of the main groove 3 respectively, which are suitable for bundling ligature wires. The elastic baffle 7 firmly positions the thick arch wire 4 through the squeezing member 9, eliminating the clearance between the thick arch wire 4 and the main groove 3. Therefore, the subsequent ligature operation on the thick arch wire 4 can be omitted, and then the traditional ligature wing structure can be omitted, making the groove body 1 into a spherical groove state, which can make the surface of the groove body 1 smoother, avoiding the friction damage of the existing ligature wing 12 to the body in the oral cavity and improving the product quality; and in order to facilitate the ligature wire bundling operation in clinical practice, a unique ligature groove 12 structure is provided outside the groove body 1, which not only ensures the protection effect of the spherical groove structure on the oral cavity, but also provides convenience for the ligature wire bundling.

[0047] In a preferred embodiment, referring to Figure 8 the figure, a traction member 13 is provided on one side of the groove body 1, and the traction members 13 between adjacent groove bodies 1 can be connected to each other. During clinical orthodontics, sometimes force needs to be applied between adjacent teeth. At this time, a connecting rope can be used to connect the adjacent traction members 13 to achieve the force application operation. Further, the traction member 13 can be set in the shape of a traction hook for convenient connection.

[0048] In a preferred embodiment, as shown in the attached Figure 4 and 7As shown, after the extrusion part 9 is inserted into the auxiliary groove 5 and the slot 10, the end part close to the self-locking cover plate 8 is set to be arc-shaped to avoid interference between the extrusion part 9 and the self-locking cover plate 8.

[0049] In a preferred embodiment, the thin arch wire 6 is respectively abutted against the side wall of the auxiliary groove 5 and the elastic baffle 7. The depth dimension between the bottom surface of the auxiliary groove 5 and the self-locking cover plate 8 is greater than the diameter dimension of the thin arch wire 6 and does not exceed twice the diameter dimension of the thin arch wire 6, so that the thin arch wire 6 can move limitedly along the depth direction of the auxiliary groove 5. In the prior art, in order to place both the thin arch wire 6 and the thick arch wire 4, the size of the groove is set larger than the thick arch wire 4, which results in a large gap between the thin arch wire 6 and the groove. In this solution, by setting the auxiliary groove 5, the movement of the thin arch wire 6 in the width direction of the auxiliary groove 5 is limited, and only the thin arch wire 6 is allowed to displace appropriately along the depth direction of the auxiliary groove 5. It can not only use the thin arch wire 6 to play a positioning role and replace the horizontal tube, but also allow the thin arch wire 6 to displace appropriately in the length direction of the auxiliary groove 2 to avoid the thin arch wire 6 making the connection between the brackets too tight and causing excessive stress on the teeth.

[0050] Refer to the attached Figure 9 , because the bracket structure in the present disclosure adopts a brand-new ball groove shape, it can be directly connected to the base structure of the lingual bracket and can be well placed at the corresponding lingual part of the tooth, with a wider application range; however, considering the clinical use requirements of the lingual bracket, the main groove 3 is arranged closer to the lingual side on one side, and the grooving angles of the main groove 3 and the auxiliary groove 5 relative to the groove body 1 are specifically set. After the groove body 1 is installed at the corresponding lingual part of the tooth, the included angle between the depth direction of the main groove 3 and the auxiliary groove 5 relative to the groove body and the horizontal plane is less than 45°. Correspondingly, the shapes and positions of the ligation grooves 12 on both sides of the groove body 1 are also adjusted adaptively to make the whole bracket structure more suitable for the lingual environment.

[0051] It can be understood that the structure of the self-locking cover plate 8 can directly select the sliding cover structure in the prior art, which is convenient to use and has a reliable structure.

[0052] The above specific implementation manners cannot be used as a limitation to the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0053] Those parts not detailed in the present invention are all well-known technologies to those skilled in the art of this technology.

Claims

1. An orthodontic self-locking bracket with an open auxiliary groove, characterized in that, Comprising: A trough body, a base is provided at the bottom of the trough body, and the base is adapted to abut against teeth; A main groove, the main groove is arranged in the trough body, and the main groove is adapted to arrange a thick arch wire; An auxiliary groove, the auxiliary groove is arranged on one side of the main groove, adapted to arrange a thin arch wire, and the direction of the auxiliary groove is the same as that of the main groove; An elastic baffle, the elastic baffle is arranged between the main groove and the auxiliary groove to separate the main groove and the auxiliary groove, and the elastic baffle abuts against the thick arch wire or the thin arch wire; A self-locking cover plate, the self-locking cover plate is arranged above the auxiliary groove and the main groove, the self-locking cover plate can be opened or closed, and after the self-locking cover plate is closed, it can limit the thin arch wire or the thick arch wire from passing through the position of the self-locking cover plate; An extrusion member, the extrusion member is used to be inserted into the auxiliary groove to elastically deform the elastic baffle in the direction of the main groove, so as to extrude the thick arch wire in the main groove and limit the movement of the thick arch wire in the main groove; The depth of the auxiliary groove is less than the depth of the main groove, so that a step is formed at the adjacent position of the auxiliary groove and the main groove, and the lower side surface of the elastic baffle is connected to the step; a slot is arranged on one side of the auxiliary groove close to the elastic baffle, and the width dimension of the slot does not exceed 1 / 2 of the width dimension of the auxiliary groove. The extrusion member is provided with a plug-in portion, and the plug-in portion can be inserted into the slot to elastically deform the elastic baffle in the direction of the main groove.

2. The orthodontic self-locking bracket with an open auxiliary groove according to claim 1, characterized in that, The extrusion member is set as a wedge-shaped block, the length of the wedge-shaped block is not greater than the distance between the bottom surface of the slot and the self-locking cover plate after closing. After the plug-in portion of the wedge-shaped block is inserted into the slot, the wedge-shaped block in the auxiliary groove can abut against the elastic baffle and the inner side wall of the auxiliary groove, so that the top of the elastic baffle forms a bending inclination toward the thick arch wire side to limit the movement of the thick arch wire along the depth and width directions of the main groove.

3. The orthodontic self-locking bracket with an open auxiliary groove according to claim 1 or 2, characterized in that, The side wall of the elastic baffle facing the main groove is set as an inclined surface, and the inclined surface of the elastic baffle makes the bottom area of the elastic baffle larger than the top area of the elastic baffle, so that after the elastic baffle is extruded and deformed, the elastic baffle can form a state of abutting and restricting the two right-angle positions on the side wall of the thick arch wire.

4. The orthodontic self-locking bracket with an open auxiliary groove according to claim 3, characterized in that, A reinforcing groove is arranged at the position of the main groove close to the step, and the reinforcing groove is adapted for the bottom of the elastic baffle to extend and be inserted.

5. The orthodontic self-locking bracket with an open auxiliary groove according to claim 4, characterized in that, The outer side of the trough body is set as an arc surface, so that the trough body forms a spherical trough structure. A ligature groove is arranged on the outer side of the trough body close to the base, and the grooving direction of the ligature groove is the same as that of the main groove, and two ligature grooves are arranged on both sides of the main groove respectively, which are adapted for tying ligature wires.

6. The orthodontic self-locking bracket with an open auxiliary groove according to claim 5, characterized in that, A traction member is arranged on one side of the trough body, and the traction members between adjacent trough bodies can be connected to each other.

7. The orthodontic self-locking bracket with an open auxiliary groove according to claim 5 or 6, characterized in that, The thin arch wire is respectively abutted against the side wall of the auxiliary groove and the elastic baffle. The depth dimension between the bottom surface of the auxiliary groove and the self-locking cover plate is greater than the diameter dimension of the thin arch wire and does not exceed 2 times the diameter dimension of the thin arch wire, so that the thin arch wire can move limitedly along the depth direction of the auxiliary groove.

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