阅读说明：本技术 牵引扣及其使用方法 (Traction buckle and using method thereof ) 是由 黄成源 于 2020-09-01 设计创作，主要内容包括：本发明涉及一种牵引扣,用于悬挂牵引件以辅助牙科正畸治疗,所述牵引扣包括：呈长条状的固定座,所述固定座的设置方向与待悬挂的牵引件的施力方向相一致；以及形成于所述固定座的顶面、且供钩挂待悬挂的牵引件的挂设部,所述挂设部设于所述固定座靠近待悬挂的牵引件的一侧。该牵引扣的固定座的设置方向与牵引件的施力方向相一致,挂设部设置在固定座靠近牵引件的一侧,牵引件的弹力作用点作用于固定座的一侧,而固定座通过其底面与隐形矫治器间的粘贴力来承受弹性件的弹力,固定座的牢固性好,结构稳定,能够很好的将牵引件的弹力完全传递给隐形矫治器,实现辅助牙科正畸治疗。(The invention relates to a traction button for suspending a traction member to assist in orthodontic treatment, the traction button comprising: the device comprises a fixed seat in a long strip shape, wherein the arrangement direction of the fixed seat is consistent with the force application direction of a traction piece to be hung; and the hanging part is formed on the top surface of the fixing seat and used for hooking the traction piece to be hung, and the hanging part is arranged on one side, close to the traction piece to be hung, of the fixing seat. This pull fixing base of knot set up the direction and pull the application of force direction of piece unanimous, hang the one side that the portion of establishing sets up at the fixing base and is close to the piece of pulling, and the elasticity action point of pulling the piece acts on one side of fixing base, and the fixing base bears the elasticity of elastic component through the adhesion force between its bottom surface and stealthy correction ware, and the fastness of fixing base is good, and stable in structure, the elasticity that will pull the piece that can be fine transmits for stealthy correction ware completely, realizes assisting the just abnormal treatment of dentistry.)

1. A pull clasp for suspending a pull to assist in orthodontic treatment, the pull clasp comprising:

the device comprises a fixed seat in a long strip shape, wherein the arrangement direction of the fixed seat is consistent with the force application direction of a traction piece to be hung; and

the hanging part is formed on the top surface of the fixing seat and used for hooking the traction piece to be hung, and the hanging part is arranged on one side, close to the traction piece to be hung, of the fixing seat.

2. The tow clasp of claim 1 wherein the hanging portion includes a cylindrical section formed perpendicular to the top surface of the mounting base and a stop section formed at the top of the cylindrical section.

3. The draft buckle as claimed in claim 2, wherein said stopper section is vertically connected to said cylindrical section and extends toward the inside of said holder.

4. The tow clasp of claim 2 wherein the stop segment is strip-shaped and is vertically connected to the post segment, and the end of the stop segment is correspondingly located within the edge of the mounting seat.

5. The tow clasp of claim 2 wherein the stop segment is arcuate and has an end portion extending toward the top surface of the mounting base and a gap with the top surface of the mounting base.

6. The tow clasp of claim 1 wherein the anchor block has opposing first and second sides, the first side being proximate to the tow member to be suspended and the second side being distal to the tow member to be suspended;

the hanging part is a hook which is formed on the first side, extends upwards and bends towards the second side.

7. The tow clasp of claim 1 wherein the bottom surface of the holder is a curved surface, the middle of the curved surface being concave.

8. The tow clasp of claim 1 wherein the bottom surface of the holder is a serrated surface, a wavy surface, or a rugged surface.

9. The use method of the traction buckle is characterized by comprising the following steps:

designing the layout position of the traction piece according to the orthodontic treatment scheme;

providing a traction buckle according to any one of claims 1 to 8, pasting the traction buckle on the dental appliance at a position corresponding to the arrangement position of the traction piece, adjusting the arrangement direction of a fixing seat of the traction buckle to be consistent with the force application direction of the traction piece to be installed, and enabling the hanging part to be close to the traction piece to be installed;

and providing a traction piece, and sleeving the traction piece on the hook part of the traction buckle, so that the traction piece applies elasticity to act on the hook part, and further acts on the tooth appliance through the traction buckle, thereby realizing the auxiliary dental orthodontic treatment.

10. The use method of claim 9, wherein when the traction member is installed, the two ends of the traction member are hung on the hanging parts of the corresponding traction buckles; or

One end of the traction piece is hung on the hanging part of the corresponding traction buckle, and the other end of the traction piece is hung on the planting nail in the oral cavity.

Technical Field

The invention relates to the technical field of orthodontic treatment, in particular to a traction buckle and a using method thereof.

Background

The invisible orthodontics is also called invisible bracket-free orthodontics and is one of orthodontics. The invisible orthodontics has no steel wire and bracket in the traditional correcting process, does not influence the outstanding advantages of beauty and the like and is widely favored by teeth beautifying persons.

The invisible tooth correction has no influence on life, does not have the pain of the traditional metal dental hoop, is convenient to wear, can be taken down at any time, is transparent, has good affinity with human bodies, and does not stimulate oral mucosa.

In the process is rescued to the tooth, need set up and draw the piece and exert traction force to correcting the ware to supplementary orthodontic treatment, draw the hook to draw the piece to realize through setting up on the traditional ferrule, and stealthy ware of correcting is subject to the shape of self, can only prefabricate the opening on correcting the ware or cut the opening on correcting the ware, draws the piece through the opening hook, but such mode is difficult to satisfy various orthodontic treatment demands. The opening is prefabricated or cut on the appliance, so that the edge of the opening is raised, and mucous membrane damage is easily caused; in addition, the opening arranged on the appliance can also cause the attaching performance of the appliance to be poor, the correction force of the teeth at the connecting part of the traction piece is insufficient, and the teeth at the connecting part are limited in movement, so that the correction effect is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a traction buckle and a using method thereof, and solves the problems that the existing invisible appliance is difficult to meet the orthodontic treatment requirement by arranging an opening to connect a traction piece, and the mucous membrane is damaged due to easy tilting of the edge at the opening, the opening influences the tooth correction effect and the like.

The technical scheme for realizing the purpose is as follows:

the invention provides a traction button for suspending a traction piece to assist orthodontic treatment, comprising:

the device comprises a fixed seat in a long strip shape, wherein the arrangement direction of the fixed seat is consistent with the force application direction of a traction piece to be hung; and

the hanging part is formed on the top surface of the fixing seat and used for hooking the traction piece to be hung, and the hanging part is arranged on one side, close to the traction piece to be hung, of the fixing seat.

The traction buckle can be directly stuck and fixed on the invisible appliance to provide a hanging position point for the traction piece, so that the traction buckle can be matched with various orthodontic treatment requirements to be fixed at a required position. This draw fixing base of knot is rectangular form, and this fixing base set up the direction and draw the application of force direction of piece unanimous, hang in addition and establish the portion setting in the fixing base near one side of drawing the piece, when the elasticity effect of drawing the piece is hung and is established the portion, hang the one side that the elasticity that establishes the portion will receive was given the fixing base, the action point of elasticity acts on one side of fixing base, and long banding fixing base and stealthy ware are connected completely, also the fixing base bears the elasticity of elastic component through the power of pasting between its bottom surface and stealthy ware, the fastness of fixing base is good, moreover, the steam generator is stable in structure, can be fine transmit the elasticity of drawing the piece for stealthy ware, realize supplementary orthodontic treatment. Moreover, hang and establish the portion setting in the fixing base and be close to one side of drawing the piece for two are hung the interval of establishing between the portion and are less, thereby can use the less piece that draws of size, reduce the foreign matter sense in the oral cavity, improve and wear the comfort level.

The traction buckle is further improved in that the hanging part comprises a columnar section vertically formed on the top surface of the fixed seat and a limiting section formed on the top of the columnar section.

The traction buckle is further improved in that the limiting section is vertically connected to the columnar section and extends towards the inner side of the fixed seat.

The traction buckle is further improved in that the limiting section is in a strip shape, the limiting section is vertically connected to the columnar section, and the end part of the limiting section is correspondingly positioned in the edge range of the fixed seat.

The traction buckle is further improved in that the limiting section is arc-shaped, the end part of the limiting section extends towards the top surface of the fixed seat, and a gap is reserved between the end part of the limiting section and the top surface of the fixed seat.

The traction buckle is further improved in that the fixed seat is provided with a first side and a second side which are opposite, the first side is close to the traction piece to be hung, and the second side is far away from the traction piece to be hung;

the hanging part is a hook which is formed on the first side, extends upwards and bends towards the second side.

The traction buckle is further improved in that the bottom surface of the fixed seat is an arc surface, and the middle part of the arc surface is concave.

The traction buckle is further improved in that the bottom surface of the fixed seat is a sawtooth surface, a wavy surface or a concave-convex surface.

The invention also provides a use method of the traction buckle, which comprises the following steps:

designing the layout position of the traction piece according to the orthodontic treatment scheme;

providing the traction buckle, adhering the traction buckle to a position, corresponding to the arrangement position of the traction piece, on the tooth appliance, adjusting the arrangement direction of a fixed seat of the traction buckle to be consistent with the force application direction of the traction piece to be installed, and enabling the hanging part to be close to the traction piece to be installed;

and providing a traction piece, and sleeving the traction piece on the hook part of the traction buckle, so that the traction piece applies elasticity to act on the hook part, and further acts on the tooth appliance through the traction buckle, thereby realizing the auxiliary dental orthodontic treatment.

The use method of the invention is further improved in that when the traction piece is installed, two ends of the traction piece are hung on the hanging parts of the corresponding traction buckles; or

One end of the traction piece is hung on the hanging part of the corresponding traction buckle, and the other end of the traction piece is hung on the planting nail in the oral cavity.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the tow clasp of the present invention.

Fig. 2 is a side view of the tow clasp shown in fig. 1.

Fig. 3 is a top view of the tow clasp shown in fig. 1.

Fig. 4 is a top view of a second embodiment of the tow clasp of the present invention.

Fig. 5 is a schematic structural view of a third embodiment of the tow clasp of the present invention.

Fig. 6 is a schematic structural view of a fourth embodiment of the tow clasp of the present invention.

Fig. 7 is a schematic structural view of a fifth embodiment of the tow clasp of the present invention.

Fig. 8 is a schematic structural view of a traction button according to a sixth embodiment of the present invention.

Fig. 9 is a schematic structural view of a seventh embodiment of the tow clasp of the present invention.

Fig. 10 is a schematic structural view of the traction button of the invention mounted on a dental model for hanging a traction piece.

Fig. 11 is a schematic structural view of the traction buckle of the present invention mounted on an invisible orthosis.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1, the invention provides a traction buckle and a use method thereof, which are used for solving the problem caused by the existing invisible appliance hooking a traction piece through an opening. The traction buckle can be directly stuck and fixed on the invisible orthodontic device, and provides a suspension point for the traction piece so as to assist the orthodontic treatment. The fixing seat of the traction buckle is in a long strip shape, the hanging part is formed on one side of the long strip-shaped fixing seat and used for hanging the traction piece, so that the force application point of the traction piece acts on one side of the fixing seat, the whole fixing seat has high tensile strength, can bear large traction force, ensures the firmness of the adhesion and fixation of the traction buckle, has good stability, and can prolong the service life of the traction buckle. In addition, the hanging parts are arranged on one side of the fixed seat, the arrangement direction of the fixed seat is consistent with the force application direction of the traction piece, so that the distance between the two hanging parts is small, the traction piece with a small size can be used, the foreign body sensation in the oral cavity is reduced, and the wearing comfort level is improved. The invention will be described with reference to the drawings.

Referring to fig. 1, a schematic structural view of a first embodiment of the tow clasp of the present invention is shown. Referring to fig. 2, a side view of the tow clasp of fig. 1 is shown. The structure of the tow clasp of the present invention will be described with reference to fig. 1 and 2.

As shown in fig. 1 and fig. 2, the traction button 20 of the present invention is used for suspending a traction member to assist orthodontic treatment, the traction button 20 includes a fixing base 21 and a hanging portion 22, the fixing base 21 is long, and the arrangement direction of the fixing base 21 is consistent with the force application direction of the traction member to be suspended; the hanging part 22 is formed on the top surface of the fixed seat 21, the hanging part 22 is used for hooking the traction piece to be hung, and the hanging part 22 is arranged on one side of the fixed seat 21 close to the traction piece to be hung.

Specifically, the fixing base 21 of the traction buckle 20 has a first side 211 and a second side 212 opposite to each other, the first side 211 and the second side 212 are located at two sides of the fixing base 21 in the length direction, the hanging portion 22 is located at the first side 211 of the fixing base 21, so that after the traction member is hung and sleeved on the hanging portion 22, the force application point of the traction member is applied to the first side 211 of the fixing base 21, and the force application principle of the fixing base 21 is explained below.

The setting direction of the fixed seat 21 is consistent with the force application direction of the traction piece, so that the length direction of the fixed seat 21 is consistent with the force application direction of the traction piece, further, the hanging part 22 is arranged on one side of the fixed seat 21 close to the traction piece, so that the elastic force of the traction piece acts on one side of the fixed seat 21 through the hanging part 22, when the fixed seat 21 is pasted and fixed on the invisible appliance, the bottom surface of the fixed seat 21 is connected and fixed with the invisible appliance through glue, if the fixed seat 21 is separated from the invisible appliance, an acting force in the direction away from the invisible appliance needs to be applied to one side of the fixed seat 21, and the acting force forms a certain angle with the top surface 214 of the fixed seat 21 or is perpendicular to the top surface 214 of the fixed seat 21. And the effect direction of the elasticity that the piece that draws produced sets up the direction the same with fixing base 21, this elasticity can not be easy make fixing base 21 and stealthy correction ware phase separation, so guaranteed the firm stability that the piece that draws is connected, in addition elasticity acts on one side of fixing base 21, for the middle part of acting on fixing base 21, fixing base 21's firm intensity is bigger, fixing base 21 can not be easy drop from stealthy correction ware, can be fine with the complete transmission for stealthy correction ware of elasticity that draws the piece, realize supplementary dental orthodontic treatment, the effect of orthodontic treatment is guaranteed.

Further, hang and establish portion 22 and set up in fixing base 21 one side that is close to the traction piece, make two to hang the interval of establishing between the portion 22 for setting up the interval of establishing between the portion of hanging in fixing base 21 middle part and will be littleer for much like this, under the same power demand of correcting, can use the less traction piece of size to reduce the foreign matter sensation in the oral cavity, improved the comfort level of wearing.

In one embodiment of the present invention, as shown in fig. 2 and 3, the hanging portion 22 includes a column section 221 formed perpendicularly on the top surface of the fixing base 21 and a stopper section 222 formed on the top of the column section 221. The cylindrical section 221 is used for hooking the traction piece, and the limiting section 222 is used for preventing the traction piece from being separated from the cylindrical section 221. The high adaptation of column section 221 is in the width of pulling after the piece is stretched can, also be that column section 221 can satisfy the hook and pull the piece can, the size height of column section 221 is less, can reduce the foreign matter sense in the oral cavity more, improves the comfort level of wearing.

Further, the position-limiting section 222 is vertically connected to the column section 221, and the position-limiting section 222 extends toward the inner side of the fixing base 21. That is, one side of the position-limiting section 222 is aligned with the side of the cylindrical section 221, and the other side of the position-limiting section 222 extends toward the inner side of the fixing base 21, so that the size of the position-limiting section 222 is larger than that of the cylindrical section 221, but the vertical projection of the position-limiting section 222 completely falls into the fixing base 21, thereby reducing the foreign body sensation in the oral cavity.

Preferably, the outer surface of the limiting section 222 is arc-shaped, so as to avoid scratching the tissues in the oral cavity and improve the wearing safety.

Furthermore, the fixing base 21 and the hanging portion 22 are integrally formed and can be integrally formed through injection molding, and the materials of the fixing base 21 and the hanging portion 22 can be the same as those of the invisible appliance.

In a preferred embodiment, the position-limiting section 222 is an enlarged head structure, and the size of the enlarged head structure is larger than that of the column section 221, so as to limit the position of the pulling element.

In an embodiment of the present invention, the position-limiting section 222 is in a strip shape, the position-limiting section is vertically connected to the column-shaped section 222, and an end of the position-limiting section 222 is correspondingly located within an edge range of the fixing base 21. Preferably, the position-limiting section 222 is a rod-shaped structure, the rod-shaped structure is vertically connected to the column-shaped section 222, and the direction of the rod-shaped structure is perpendicular to the length direction of the fixing base 21, so that the designed position-limiting section 222 can limit the traction member and is also convenient to hide. Specifically, when the traction buckle is installed and fixed on the invisible appliance, the traction buckle is arranged close to the position of the tooth gap on the invisible appliance, the rod-shaped structure (namely, the limiting section 222) is positioned at the position of the tooth gap, the limiting section 222 and the columnar section 221 are convenient to hide, the influence of the limiting section 222 and the columnar section 221 on the oral cavity is reduced, the foreign body sensation is reduced, and the wearing comfort level is improved.

In one embodiment of the present invention, the bottom surface 213 of the fixing base 21 is a serrated surface, a wavy surface, or a rugged surface.

As shown in fig. 4, a second embodiment of the towing clasp of the present invention is shown, which is different from the first embodiment in the shape of the position-limiting section, in the second embodiment, the position-limiting section 222 is arc-shaped, and the end of the position-limiting section 222 extends toward the top surface 214 of the fixing base 21 and has a gap 223 with the top surface 214 of the fixing base 21. The arc-shaped limiting section 222 is integrally in a hook shape, the traction piece can be sleeved on the columnar section 221 through the gap 223, and the hook-shaped limiting section 222 limits the traction piece and can prevent the traction piece from being separated.

As shown in fig. 5, a third embodiment of the traction buckle of the present invention is shown, which is different from the first embodiment in the shape of the bottom surface 213 of the fixing seat 21, in which the bottom surface 213 of the fixing seat 21 is a sawtooth surface, and the direction of the sawtooth in the sawtooth surface is perpendicular to the length direction of the fixing seat 21, that is, the sawtooth is arranged along the width direction of the fixing seat 21, on one hand, the sawtooth surface can contain more glue for sticking through the sawtooth grooves on the sawtooth surface, so as to improve the sticking strength of the fixing seat 21, and on the other hand, the sawtooth in the sawtooth surface is arranged along the width direction, so as to provide a certain flexibility to the length direction of the fixing seat 21, so that the fixing seat 21 can be bent and deformed properly, so as to achieve better sticking of the fixing seat 21 to the invisible appliance.

The invisible orthodontic appliances are formed by injection molding according to the jaw models, and the specific shapes of the invisible orthodontic appliances are matched with the tooth shapes of users, so that the shapes of the invisible orthodontic appliances are different. In addition, the outer side surface (i.e. the side attached to the lip) of the invisible appliance is mostly an outward convex arc surface, and the inner side surface (i.e. the side attached to the tongue) has both an inward concave surface and an outward convex surface. In order to adapt the traction buckle to various invisible appliances, the bottom surface 213 of the fixed seat 21 of the traction buckle 20 is provided with a sawtooth surface, so that the fixed seat 21 has certain deformability, the fixed seat 21 can be perfectly attached to various invisible appliances through deformation, and the applicability of the traction buckle 20 is improved.

As shown in fig. 6, a fourth embodiment of the towing clasp of the present invention is shown, which is different from the first embodiment in the shape of the bottom surface 213 of the fixed seat 21, and in this fourth embodiment, the bottom surface 213 of the fixed seat 21 is a wavy surface, and the bottom surface 213 is provided with a continuous arc-shaped groove and arc-shaped protrusion, which are connected to form a wavy surface. This wavy surface has two aspects effects, increases gluey quantity on the one hand, improves fixing base 21's firm intensity of pasting, and on the other hand can make fixing base 21 can bending deformation, makes laminating that fixing base 21 can be perfect on stealthy correction ware through warping.

As shown in fig. 7, a fifth embodiment of the invention is shown, which is different from the first embodiment in the shape of the bottom surface 213 of the fixing base 21, in which the bottom surface 213 of the fixing base 21 is rugged, saw tooth grooves recessed toward the inside of the fixing base 21 are alternately formed on the bottom surface 213, and the rugged shape is formed on the bottom surface 213 by the saw tooth grooves. This unsmooth nonplanar has the effect in two aspects, increases the quantity of gluing on the one hand, improves fixing base 21's firm intensity of pasting, and on the other hand can make fixing base 21 can bending deformation, makes the laminating that fixing base 21 can be perfect on stealthy rescue the ware through warping.

As shown in fig. 8, a sixth embodiment of the invention is shown, which is different from the first embodiment in the shape of the bottom surface 213 of the fixing base 21, in which the bottom surface 213 of the fixing base 21 is a rugged surface, and the bottom surface 213 is provided with arc-shaped grooves at intervals, which are concaved toward the inside of the fixing base 21, and the rugged shape is formed on the bottom surface 213 through the arc-shaped grooves. This unsmooth nonplanar has the effect in two aspects, increases the quantity of gluing on the one hand, improves fixing base 21's firm intensity of pasting, and on the other hand can make fixing base 21 can bending deformation, makes the laminating that fixing base 21 can be perfect on stealthy rescue the ware through warping.

In one embodiment of the present invention, as shown in fig. 9, the seventh embodiment is different from the first embodiment in the structure of the hanging part 22, in the seventh embodiment, the fixed seat 21 has a first side 211 and a second side 212 opposite to each other, the first side 211 is close to the pulling member to be hung, the second side 212 is far away from the pulling member to be hung, and the hanging part 22 is a hook formed on the first side 211 and extending upward and then bending toward the second side 212, and the pulling member is hung and sleeved by the hook.

Preferably, the size of the end of the hook connected with the fixed seat 21 to the end above the fixed seat 21 is gradually reduced from thick. The hook is arc-shaped, L-shaped or C-shaped. The end of the hook is preferably located above the middle of the holder 21.

In an embodiment of the present invention, the bottom surface of the fixing base 21 is a curved surface, as shown in fig. 2, the middle of the curved surface is concave, and two sides of the curved surface are convex, and two sides of the curved surface are the sides close to the first side 211 and the second side 212.

In one embodiment of the present invention, as shown in fig. 3, the top surface of the fixing base 21 has an oval shape or an oblong shape. The periphery of the fixed seat 21 is arc-shaped, so that the fixed seat is smooth.

As shown in fig. 10 and 11, the use of the tow clasp 20 of the present invention will now be described. Fig. 10 shows that the dental jaw model 11 is provided with the traction buttons 20, the two traction buttons 20 are arranged on two tooth models which are opposite up and down, the two traction buttons 20 are opposite, hanging parts on the two traction buttons 20 are close to each other, the two traction buttons 20 are sleeved with the traction piece 12, the traction piece 12 is in a stretching shape, and the traction piece 12 generates elastic force to act on the two traction buttons 20 so as to realize that the two tooth models are pulled towards the directions which are close to each other. In fig. 11, it is shown that the traction buckle 20 is arranged on the invisible appliance 10, the traction buckle 20 can be attached to the outer side surface of the invisible appliance 10, and can also be attached to the inner side surface of the invisible appliance 10, and the position of the traction buckle 20 can be flexibly arranged as required, and the traction buckle 20 can be attached to any position of the invisible appliance through the deformation of the fixing seat 21, so as to meet the requirements of orthodontic treatment to the greatest extent. When this pull knot 20 is fixed, can draw the setting of the tooth gap department on the stealthy ware 10 of rescuring as far as possible of being close to of the first side of knot 20, utilize the interior recess department in tooth gap to hide the portion of establishing of hanging on this pull knot 20, reduce the protrusion degree of establishing the portion of hanging, reduce the foreign body sensation in the oral cavity, improve and wear the comfort level.

The traction button is suitable for various traction types in orthodontic treatment, such as conventional class II traction, class III traction, auxiliary anterior adduction of the implant nail, pressing of the implant nail against the tooth, vertical traction, interactive traction and the like. The traction buckle has the advantages of small structure, firm adhesion, flexible and convenient use and suitability for various orthodontic treatment schemes.

The invention also provides a using method of the traction buckle, which is explained below.

The invention discloses a using method of a traction buckle, which comprises the following steps:

designing the layout position of the traction piece according to the orthodontic treatment scheme;

providing a traction buckle, pasting the traction buckle on the tooth appliance at a position corresponding to the arrangement position of the traction piece, adjusting the arrangement direction of a fixed seat of the traction buckle to be consistent with the force application direction of the traction piece to be installed, and enabling the hanging part to be close to the traction piece to be installed;

the traction piece is sleeved on the hook part of the traction buckle, so that the traction piece exerts elastic force to act on the hook part, and then acts on the tooth appliance through the traction buckle, and the auxiliary dental orthodontic treatment is realized.

In a specific embodiment of the invention, when the traction piece is installed, two ends of the traction piece are hung on the hanging parts of the corresponding traction buckles; or

One end of the traction piece is hung on the hanging part of the corresponding traction buckle, and the other end of the traction piece is hung on the planting nail in the oral cavity.

While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.