CN220898827U - Traction device and shell-shaped dental instrument - Google Patents

Abstract

The utility model provides a traction device and a shell-shaped dental appliance, wherein the traction device is installed on an invisible appliance through a mounting hole and comprises a traction part, a fixing part and a mounting part which are arranged adjacently in sequence, a limit groove for hanging a traction part is formed between the traction part and the fixing part, and the mounting part penetrates through the mounting hole from the outer surface of the invisible appliance to the inner surface of the invisible appliance; wherein, when the mounting part passes through the mounting hole, the mounting part elastically deforms and contracts; the installation part restores to the original shape after passing through the installation hole, and the installation part and the fixing part are respectively clamped on the inner surface and the outer surface of the invisible appliance, so that the traction device is fixedly connected with the invisible appliance. The traction device and the shell-shaped dental instrument provided by the utility model can enable the traction device to be quickly and stably arranged on the invisible appliance.

Description

Traction device and shell-shaped dental instrument

Technical Field

The utility model belongs to the technical field of tooth correction, and particularly relates to a traction device and a shell-shaped dental instrument.

Background

In dental clinical orthodontic treatment, in the scheme of performing dental orthodontic or orthognatic treatment using an invisible appliance, the orthodontic effect is sometimes enhanced by using a functional attachment. Common functional accessories include traction devices for suspending the traction member such that traction forces act on the respective location. In many cases, for example anterior depression, tooth extension, gap adjustment, eruption traction, tooth torsion, etc., an auxiliary treatment with the aid of traction means is required.

When the traction device is used for auxiliary treatment, a mode of combining the traction device with the invisible appliance is generally adopted, the invisible appliance is provided with a mounting hole penetrating through the invisible appliance, the traction device is fixedly connected with the invisible appliance through the mounting hole, and traction pieces such as rubber bands and rubber chains are hung on the traction device to traction teeth to the correct position, so that the traction effect is achieved. The existing traction device generally comprises an integrated traction device and a split traction device, wherein the transverse cross-sectional area of the part of the integrated traction device passing through the mounting hole in the mounting direction is larger than that of the mounting hole in the mounting direction, the traction device is of a solid inelastic structure, the edge of the mounting hole is enlarged when the traction device passes through the mounting hole, the integrity of the invisible appliance is damaged, the correction force of the invisible appliance is reduced, the correction effect is influenced, even unqualified products are generated, and a new invisible appliance needs to be replaced for being mounted with the traction device; the split traction device comprises two independent parts, namely a traction piece and a retention gasket, when the traction device is installed on the invisible appliance, the traction piece is installed firstly, the traction piece penetrates through an installation hole, then the retention gasket is installed, the retention gasket is installed on the part, penetrating through the installation hole, of the traction piece, so that the traction device is fixedly connected with the invisible appliance, when the traction device is installed on the split invisible appliance, the traction piece and the retention gasket are required to be installed, the installation is complicated, the invisible appliance of the traction device is arranged, the traction device is loosened in the correction process and the wearing process of the invisible appliance due to the action of force, the effect of the retention gasket is influenced, even the retention gasket has the falling risk, and a patient swallows or inhales a trachea accidentally, so that medical accidents are caused.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provides a traction device and a shell-shaped dental appliance, which can ensure that the traction device is quickly and stably installed on an invisible appliance and maintain the integrity of the invisible appliance.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The traction device is installed on the invisible appliance through the installation hole and comprises a traction part, a fixing part and an installation part which are arranged adjacently in sequence, wherein a limit groove for hanging a traction piece is formed between the traction part and the fixing part, and the installation part penetrates through the installation hole from the outer surface of the invisible appliance to the inner surface of the invisible appliance; wherein the mounting portion is elastically deformed to contract when passing through the mounting hole; the installation part is restored to the original shape after passing through the installation hole, and the installation part and the fixing part are respectively clamped on the inner surface and the outer surface of the invisible appliance, so that the traction device is fixedly connected with the invisible appliance.

Preferably, the mounting portion includes a fastening portion and an elastic deformation buffer portion, the elastic deformation buffer portion is a sustained-release space reserved by elastic deformation when the fastening portion passes through the mounting hole, and when the mounting portion passes through the mounting hole, the fastening portion gathers together towards the elastic deformation buffer portion, so that the fastening portion passes through the mounting hole.

Preferably, the elastic deformation buffer part is a slow release groove, and the slow release groove spans the buckling part to divide the buckling part into at least two parts.

Preferably, one end of the slow release groove, which is far away from the fixing part, is of an opening structure, and the depth of the slow release groove along the installation direction is greater than or equal to the length of the buckle part along the installation direction.

Preferably, one end of the slow release groove, which is close to the fixing part, is of an opening structure, and the depth of the slow release groove along the installation direction is smaller than the length of the buckling part along the installation direction.

Preferably, the installation department includes the installation body, the one end of installation body with fixed part is connected, buckle portion locates the other end of installation body, buckle portion includes first end, second end and slope setting be used for guiding buckle portion passes the guide surface of mounting hole, the guide surface is located first end with between the second end, first end is kept away from fixed part, the second end is close to fixed part, first end with the junction of guide surface extremely the second end with the guide surface be in perpendicular to the ascending outline size of installation direction increases gradually.

Preferably, the slow release groove comprises a first groove and a second groove which is arranged at an included angle with the first groove, and the included angle is in the range of 80-100 degrees.

Preferably, the mounting portion further includes a connecting portion penetrating the mounting hole, one end of the connecting portion is connected with the fixing portion, the other end of the connecting portion is connected with the fastening portion, the fastening portion includes a supporting portion, a first end portion, a second end portion and a guiding portion for guiding the fastening portion to penetrate the mounting hole, the supporting portion is connected with the first end portion, the second end portion is disposed at a free end of the guiding portion, and the other end of the guiding portion is connected with the first end portion.

Preferably, the guide part comprises a first guide surface and a second guide surface, the first guide surface is connected with the first end part, the second guide surface is connected with the second end part, the outer contour dimension from the connection position of the first end part and the first guide surface to the connection position of the first guide surface and the second guide surface in the perpendicular installation direction is gradually increased, and the outer contour dimension from the connection position of the first guide surface and the second guide surface to the connection position of the second guide surface and the second end part in the perpendicular installation direction is kept unchanged.

Preferably, the cross section of the mounting part passing through the invisible appliance is of a non-circular structure for preventing relative rotation with the invisible appliance, and the cross section of the mounting part passing through the invisible appliance is matched with the shape of the mounting hole arranged on the invisible appliance.

The utility model also provides a shell-shaped dental appliance, which comprises an invisible appliance and any traction device, wherein the invisible appliance is provided with a mounting platform for mounting the traction device, the mounting platform and the invisible appliance are integrally formed and convexly arranged on the outer surface of the invisible appliance, and the traction device is fixedly connected to the invisible appliance after passing through a mounting hole on the mounting platform on the invisible appliance.

By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:

(1) The traction device provided by the embodiment of the utility model comprises the traction part, the fixing part and the mounting part which are adjacently arranged in sequence, is simple in structure, is fixedly mounted on the invisible appliance through elastic deformation of the mounting part, does not damage the edge size of the mounting hole, and ensures the integrity of the invisible appliance.

(2) The traction device provided by the embodiment of the utility model can be fixedly connected with the invisible appliance by one-step installation, is simple and convenient to install, and effectively improves the operation efficiency.

(3) After the shell-shaped dental appliance provided by the embodiment of the utility model is installed on the invisible appliance, the connecting effect between the shell-shaped dental appliance and the invisible appliance is stable, and the shell-shaped dental appliance can play a better hooking role on traction elements such as rubber bands, so that the shell-shaped dental appliance is better suitable for the correction process of the shell-shaped appliance.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic perspective view of a traction device according to an embodiment of the present utility model;

Fig. 2 is a schematic front view of a traction apparatus according to an embodiment of the present utility model;

Fig. 3 is a schematic top view of a traction device according to an embodiment of the present utility model;

FIG. 4 is a schematic view in partial cross-section of a traction device provided in an embodiment of the present utility model when mounted to a shell-like appliance;

FIG. 5 is a schematic view of the structure of the invisible appliance at the mounting hole according to the embodiment of the utility model;

FIG. 6 is a schematic diagram of a front view of a traction device when marked with a size symbol according to an embodiment of the present utility model;

fig. 7 is a schematic diagram of a front view structure of a traction device with an opening structure at one end of a slow release groove close to a fixing part according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of another front view of the traction device when marked with a size symbol according to an embodiment of the present utility model;

FIG. 9 is a schematic view in partial cross-section of another traction device provided by an embodiment of the present utility model mounted to a shell-like appliance;

Fig. 10 is a schematic front view of a traction device when a limiting part of the traction part provided by the embodiment of the utility model is hemispherical;

FIG. 11 is a schematic diagram of a front view of a traction device when a traction portion provided in an embodiment of the present utility model is hooked;

FIG. 12 is a schematic perspective view of a shell dental appliance formed by a traction device mounted to an invisible appliance according to an embodiment of the present utility model;

FIG. 13 is an enlarged schematic view of the portion A in FIG. 12;

FIG. 14 is a schematic perspective view of an invisible appliance according to an embodiment of the present utility model;

fig. 15 is an enlarged schematic view of the portion B in fig. 14.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some embodiments of the present utility model, and the embodiments of the present utility model and technical features of the embodiments may be combined with each other without conflict, and other drawings may be obtained from these drawings and other embodiments may be obtained by those skilled in the art without inventive effort.

For the sake of simplicity of the drawing, the parts relevant to the present utility model are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

Example 1

Referring to fig. 1 to 10, the present utility model provides a traction device 1, which is installed on an invisible appliance 3 through an installation hole 2, and comprises a traction portion 11, a fixing portion 21 and an installation portion 31 which are adjacently arranged in sequence, wherein the force generated when the traction portion 11 is pulled is transmitted to the invisible appliance 3 through the installation portion 31, and the interaction force between the invisible appliance 3 and the traction device 1 is utilized to achieve a desired correction plan. In this embodiment, the traction device 1 is an integrally formed structure, which not only reduces the process and improves the processing efficiency, but also ensures the connection stability among the traction portion 11, the fixing portion 21 and the mounting portion 31 in an integrally formed manner, thereby improving the stability of the traction device 1 and ensuring that the traction device 1 can provide stable correction force. The traction device 1 may be manufactured by 3D printing, or may be manufactured by high-temperature pressurizing, pressing, one-step forming or manual manufacturing, and the manufacturing method of the traction device 1 is determined and selected according to practical situations, which is not limited herein. The traction part 11 and the fixing part 21 form a limit groove 101 for hanging a traction piece, the traction part 11 comprises a limit part 111 and a traction rod 112, the limit part 111 is arranged at the free end of the traction rod 112, the limit part 111, the traction rod 112 and the fixing part 21 form the limit groove 101, the traction piece is hung on the traction rod 112, the traction piece is matched with the traction device 1 to achieve traction, the traction device 1 acts on a corresponding part to be corrected through the traction of the traction piece so as to achieve a desired correction plan, the traction piece can be an elastic body such as a rubber band or a spring, and the like, the mounting part 31 penetrates from the outer surface of the invisible appliance 3 to the inner surface of the invisible appliance 3 through the mounting hole 2, as shown in fig. 4, the invisible appliance 3 wraps teeth, one surface contacted with the teeth is defined as the inner surface of the invisible appliance 3 (Y refers to the inner surface of the invisible appliance 3), and the other surface opposite surface is defined as the outer surface of the invisible appliance 3 (X refers to the outer surface of the invisible appliance 3). Wherein, when the mounting part 31 passes through the mounting hole 2, the mounting part 31 is elastically deformed to contract; the mounting portion 31 is restored to the original shape after passing through the mounting hole 2, and the mounting portion 31 and the fixing portion 21 are respectively clamped on the inner surface and the outer surface of the invisible appliance 3, so that the traction device 1 is fixedly connected with the invisible appliance 3. The mounting portion 31 is made of a medical elastic material applicable to the inside of the mouth, and the mounting portion 31 is capable of contracting under an external force and generating a restoring force, and is capable of restoring to an original shape after the external force is removed.

Specifically, the mounting portion 31 includes a fastening portion 301 and an elastic deformation buffer portion 302, where the elastic deformation buffer portion 302 is a sustained-release space reserved for elastic deformation of the fastening portion 301 when passing through the mounting hole 2, and when the mounting portion 31 passes through the mounting hole 2, the fastening portion 301 gathers together with the elastic deformation buffer portion 302, so that the fastening portion 301 passes through the mounting hole 2. Wherein, the elastic deformation buffer portion 302 is a slow release groove, the slow release groove 302 spans the buckling portion 301 to divide the buckling portion 301 into at least two parts, and the surface of the buckling portion 301 contacting with the teeth is set to be a curved surface matched with the surfaces of the teeth, so that the buckling portion 301 closely contacts with the surfaces of the teeth, and discomfort caused by wearing is reduced.

In some embodiments, as shown in fig. 1 to 6, one end of the sustained release groove 302 away from the fixed portion 21 is in an open structure, a depth D1 (as shown in fig. 6) of the sustained release groove 302 in the mounting direction (i.e., the S-axis direction shown in fig. 4) is greater than or equal to a length L1 (as shown in fig. 6) of the fastening portion 301 in the mounting direction, the mounting portion 31 includes a mounting body 311, one end of the mounting body 311 is connected to the fixed portion 21, the fastening portion 301 is provided at the other end of the mounting body 311, the fastening portion 301 includes a first end 331, a second end 332, and a guide surface 333 for guiding the fastening portion 301 through the mounting hole 2, the guide surface 333 is provided between the first end 331 and the second end 332, the first end 331 is away from the fixed portion 21, the second end 332 is close to the fixed portion 21, an outer dimension W1 (as shown in fig. 6) of the first end 331 at a connection point perpendicular to the guide surface 333 is smaller than or equal to a dimension W2 (as shown in fig. 5) of the mounting hole 2 in the mounting direction, the connection point at the first end and the guide surface 333 at a connection point perpendicular to the mounting direction is perpendicular to the dimension W2 in the mounting direction, and the first end 331 at a connection point perpendicular to the dimension W1 at the mounting point of the fastening portion 2 is perpendicular to the mounting hole 2 is a dimension W2 in the mounting point 2mm 2, and a difference of the first end and a value of 0.2mm can be mounted directly between the first end and a 2mm between the mounting end and a2 and a mounting end 2 can be mounted at the end 2 is provided at the end 2; the outer dimension W3 (as shown in fig. 6) of the connection between the second end 332 and the guide surface 333 in the direction perpendicular to the installation direction is larger than the dimension W2 of the installation hole 2 in the direction perpendicular to the installation direction, the difference between the outer dimension W3 of the connection between the second end 332 and the guide surface 333 in the direction perpendicular to the installation direction and the dimension W2 of the installation hole 2 in the direction perpendicular to the installation direction is 0.2mm-0.5mm, and after the fastening portion 301 passes through the installation hole 2, the fastening portion 301 can be always kept on the inner surface of the concealed appliance 3 without passing through the installation hole 2. The outer dimension of the connection between the first end 331 and the guide surface 333 and the connection between the second end 332 and the guide surface 333 are gradually increased in the perpendicular direction to the installation direction, so that the guide surface 333 can better perform a guiding function, and the guide surface 333 smoothly passes through the wall of the installation hole 2. When the mounting portion 31 passes through the mounting hole 2, the first end 331 passes through the mounting hole 2, the mounting hole moves along the guide surface 333 to the second end 332, the fastening portion 301 gathers together to the slow release groove 302 due to being extruded by the mounting hole 2, so that the second end passes through the mounting hole, after passing through the mounting hole, the fastening portion 301 returns to the original shape, the invisible appliance 3 is clamped between the fixing portion 21 and the fastening portion 301, and the second end 332 of the fastening portion is abutted against the invisible appliance. In some specific cases, the slow release groove 302 includes a first groove 361 and a second groove 362 disposed at an included angle a (as shown in fig. 3) with the first groove 361, where the included angle a ranges from 80 ° to 100 °, and when the included angle a is 90 °, the first groove 361 and the second groove 362 are perpendicular to each other, and the overall shape is cross-shaped, so that the retention area of the mounting portion 31 abutting against the inner surface of the invisible appliance 3 is large, the retention effect is enhanced, and when the fastening portion 301 gathers together, a circular shape is formed on a transverse section perpendicular to the mounting direction, so that the mounting hole 2 is easier to pass. The slow release groove 302 may be a linear groove, or may be a groove of another shape, and the shape of the fastening portion 301 may be a fan-shaped projection, a semicircular projection, or a projection of another shape, so long as the mounting portion 31 can be elastically deformed and contracted to pass through the mounting hole 2.

In other embodiments, as shown in fig. 7 to 9, an end of the slow release groove 302 near the fixing portion 21 is of an open structure, and a depth D1 (as shown in fig. 8) of the slow release groove 302 in the mounting direction is smaller than a length L1 (as shown in fig. 8) of the fastening portion 301 in the mounting direction. The mounting portion 31 further includes a connecting portion 303 penetrating the mounting hole 2, one end of the connecting portion 303 is connected to the fixing portion 21, the other end of the connecting portion 303 is connected to the fastening portion 301, an outer dimension W4 (as shown in fig. 8) of the connecting portion 303 perpendicular to the mounting direction is smaller than or equal to a dimension W2 of the mounting hole 2 perpendicular to the mounting direction, and a difference between the outer dimension W4 of the connecting portion 303 perpendicular to the mounting direction and the dimension W2 of the mounting hole 2 perpendicular to the mounting direction is in a range of 0mm to 0.2mm, so that the connecting portion 303 can smoothly penetrate the mounting hole 2; the length L2 (as shown in fig. 8) of the connection portion 303 in the installation direction is greater than or equal to the depth D2 (as shown in fig. 5) of the installation hole 2 in the installation direction, the difference between the length L2 of the connection portion 303 in the installation direction and the depth D2 of the installation hole 2 in the installation direction is in the range of 0mm to 0.3mm, and the length L2 of the connection portion 303 in the installation direction and the depth D2 of the installation hole 2 in the installation direction are substantially identical, so that the auxiliary fixing function can be performed. The fastening portion 301 includes a supporting portion 341, a first end portion 342, a second end portion 343, and a guiding portion 344 for guiding the fastening portion 301 to pass through the mounting hole 2, where the supporting portion 341 is connected to the first end portion 342, the second end portion 343 is disposed at a free end of the guiding portion 344, and the other end of the guiding portion 344 is connected to the first end portion 342. The guide portion 344 includes a first guide surface 351 and a second guide surface 352, the first guide surface 351 is connected to the first end portion 342, the second guide surface 352 is connected to the second end portion 343, an outer dimension W5 (as shown in fig. 8) of the connection of the first end portion 342 to the first guide surface 351 in the perpendicular direction to the installation direction is smaller than an outer dimension W6 (as shown in fig. 8) of the connection of the first guide surface 351 to the second guide surface 352 in the perpendicular direction, the outer dimension W6 of the connection of the first guide surface 351 to the second guide surface 352 in the perpendicular direction is equal to an outer dimension W7 (as shown in fig. 8) of the connection of the second guide surface 352 to the second end portion 343 in the perpendicular direction, the outer dimension 343 of the connection of the first end portion 342 to the first guide surface 351 in the perpendicular direction is gradually increased, so that the first guide surface 333 can better guide the second end portion through the installation hole wall 2, the outer dimension 343 of the connection of the first guide surface 351 to the second guide surface is not kept in the perpendicular direction, and the outer dimension 343 of the second guide surface is not kept in the perpendicular direction, and the connection of the second guide surface 3 is kept out of the perpendicular to the second guide surface 352. When the mounting portion 31 passes through the mounting hole 2, the first end 342 passes through the mounting hole 2, the mounting hole 2 moves 343 along the guiding portion 344 towards the second end, the fastening portion 301 gathers together towards the slow release groove 302 due to being extruded by the mounting hole 2, so that the second end 343 passes through the mounting hole 2, after passing through the mounting hole 2, the fastening portion 344 returns to the original shape, the invisible appliance 3 is clamped between the fixing portion 21 and the fastening portion 301, and the second end 343 and the second guiding surface 352 of the fastening portion are respectively abutted against the inner surface of the invisible appliance 3.

Of course, in order to enhance the retention effect, the resin may be coated in the groove of the slow release groove 302 after the traction device 1 and the invisible appliance 3 are mounted.

The cross section of the mounting part 31 passing through the invisible appliance 3 can be designed into different shapes according to the appliance requirement. In some embodiments, the cross section of the mounting portion 31 passing through the invisible appliance 3 is matched with the shape of the mounting hole 2 arranged on the invisible appliance 3, and the cross sections of the mounting portion and the mounting hole are both circular structures in the direction perpendicular to the mounting direction, so that the processing technology is simple, and the mounting is quick and convenient. In another embodiment, the cross section of the mounting portion 31 passing through the invisible appliance 3 is a non-circular structure for preventing the traction device 1 and the invisible appliance 3 from rotating relatively, the cross section of the mounting portion 31 passing through the invisible appliance 3 is matched with the shape of the mounting hole 2 arranged on the invisible appliance 3, for example, the mounting portion 31 and the mounting hole are both in a rectangular structure, a triangular structure or other polygonal structures, when the traction device 1 is used for correction, the traction device 1 and the invisible appliance 3 cannot move or rotate relatively after being combined when the setting direction of the traction portion 11 arranged on the traction device 1 has correction requirements, so that correction effect is affected, and therefore, the position of the connecting portion 303 passing through the invisible appliance 3 needs to be designed into the non-circular structure, and when the connecting portion 303 is matched with the invisible appliance 3, the positions of the traction device and the invisible appliance are relatively stable, and cannot move or rotate. The traction part 11 can also be designed into different shapes according to different correction requirements. In some embodiments, as shown in fig. 2, the limiting part 111 of the traction part 11 has a ladder-shaped structure, and smooth and round edge, when the patient wears the oral cavity, the patient's oral cavity is prevented from being scratched, the safety and comfort are achieved, the overall length is reduced, and further, the traction device 1 with smaller size can be used under the same correction force requirement, the foreign body sensation in the oral cavity is reduced, and the wearing comfort is improved. In other embodiments, as shown in fig. 10, the limiting portion 111 of the traction portion 11 has a hemispherical structure, and the processing technology is simple and the installation is convenient. In other embodiments, as shown in fig. 11, the traction portion 11 is a hook structure disposed at an angle to the fixing portion 21, and directional traction can be completed according to the correction requirement. Alternatively, the traction portion 11 may have another structure, and the structure of the traction portion 11 is not limited in this embodiment as long as the limit groove 101 can be formed between the traction portion 11 and the fixing portion 21 and can be used for suspending the traction member.

Example 2

The utility model provides a shell-shaped dental appliance 4, as shown in fig. 12 and 13, the shell-shaped dental appliance comprises an invisible appliance 3 and a traction device 1 in the embodiment 1, as shown in fig. 14 and 15, the invisible appliance 3 comprises a plurality of cavities for accommodating upper or lower jaw teeth, a mounting platform 41 for mounting the traction device 1 is arranged on the cavity of the invisible appliance 3, the mounting platform 41 and the invisible appliance 3 are integrally formed and convexly arranged on the outer surface of the invisible appliance 3, and the traction device 1 is fixedly connected to the invisible appliance 3 after passing through a mounting hole 2 on the mounting platform 41 on the invisible appliance 3.

Wherein the mounting platform 41 is a part of the invisible appliance 3, which is convexly arranged for mounting the traction device 1. By having the mounting platform 41 protrude from the outer surface of the invisible appliance 3, sufficient space can be left for the installation of the traction device 1. When the shell-shaped dental appliance is used, the inner surface of the invisible appliance 3 is sleeved on the surface of the teeth of the patient, a reserved space can be formed between the mounting platform 41 and the teeth of the patient, and the mounting part 31 of the traction device 1 can be accommodated in the reserved space. The surface of the mounting portion 31 adjacent to the teeth may be disposed at a distance from the teeth at the position corresponding to the mounting platform 41, and by providing a certain distance between the surface of the mounting base and the teeth of the patient, the foreign body sensation in the mouth of the patient can be reduced, and the comfort of the patient when wearing the shell-shaped dental appliance can be ensured. The surface of the mounting portion 31 adjacent to the teeth may also be closely fitted to the teeth at the corresponding position of the mounting platform 41, so that a stable orthodontic force can be provided to the teeth by closely fitting the mounting base surface to the teeth of the patient. In some embodiments, the mounting platform 41 is a regular or substantially regular area. The mounting hole 2 may in particular be a circular or substantially circular area, an elliptical or substantially elliptical area, a rectangular or substantially rectangular area, etc. In other embodiments, the mounting hole 2 may be an irregular area, which is not limited herein. The shape of mounting hole 2 can be according to the demand adaptability setting of correcting of difference, has improved the rationality that mounting hole 2 set up to cooperate according to reasonable mounting hole 2 and installation department 31 and guaranteed that the power that produces when traction portion 11 is pulled can better disperse to shell-shaped dental appliance 10, and then improve the correction effect that shell-shaped dental appliance 10, shorten the correction cycle.

Moreover, the shape of the mounting part 31 is matched with the outline of the mounting platform 41, and the interaction between the mounting platform 41 and the mounting part 31 of the traction device 1 can enable the invisible appliance 3 and the traction device 1 to generate larger retention force, so that the acting force generated by deformation of the invisible appliance 3 can be better transmitted to achieve the expected correction plan, the target correction effect is achieved, for example, the acting force can be better transmitted to teeth to better realize the movement of the teeth, and therefore, the correction effect can be improved and the correction period can be shortened.

Example 3

The application also provides a tooth correcting system, which comprises a plurality of correcting steps, wherein at least one correcting step comprises the shell-shaped dental appliance 4 in the embodiment 2, the dentition of a patient gradually changes from an initial position to a correcting target position along with the progress of the correcting process, and the traction device 1 can change the shape, the size and the position according to the actual correcting requirement or replace different traction devices 1 according to the actual correcting requirement, so that the expected correcting effect is achieved.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.

Claims (11)

1. The traction device is installed on the invisible appliance through the installation hole and is characterized by comprising a traction part, a fixing part and an installation part which are arranged adjacently in sequence, wherein a limit groove for hanging a traction part is formed between the traction part and the fixing part, and the installation part penetrates through the installation hole from the outer surface of the invisible appliance to the inner surface of the invisible appliance;

Wherein the mounting portion is elastically deformed to contract when passing through the mounting hole; the installation part is restored to the original shape after passing through the installation hole, and the installation part and the fixing part are respectively clamped on the inner surface and the outer surface of the invisible appliance, so that the traction device is fixedly connected with the invisible appliance.

2. The traction device of claim 1, wherein the mounting portion includes a snap-fit portion and an elastically deformable buffer portion, the elastically deformable buffer portion being a slow release space reserved for elastic deformation of the snap-fit portion when passing through the mounting hole, the snap-fit portion bunching toward the elastically deformable buffer portion when the mounting portion passes through the mounting hole such that the snap-fit portion passes through the mounting hole.

3. The traction device of claim 2, wherein the elastically deformable buffer is a slow release groove that divides the clasp into at least two portions across the clasp.

4. A traction device according to claim 3, wherein one end of the slow release groove away from the fixing portion is of an opening structure, and the depth of the slow release groove in the mounting direction is greater than or equal to the length of the buckle portion in the mounting direction.

5. A traction device according to claim 3, wherein one end of the slow release groove adjacent to the fixing portion is of an opening structure, and a depth of the slow release groove in the mounting direction is smaller than a length of the buckle portion in the mounting direction.

6. The traction device of claim 4, wherein the mounting portion comprises a mounting body, one end of the mounting body is connected with the fixing portion, the fastening portion is disposed at the other end of the mounting body, the fastening portion comprises a first end, a second end, and a guide surface obliquely disposed for guiding the fastening portion to pass through the mounting hole, the guide surface is disposed between the first end and the second end, the first end is away from the fixing portion, the second end is close to the fixing portion, and an outer dimension of a portion from a connection portion between the first end and the guide surface to a connection portion between the second end and the guide surface in a direction perpendicular to the mounting direction is gradually increased.

7. The traction device of claim 4, wherein the slow release groove comprises a first groove and a second groove disposed at an angle to the first groove, the angle ranging from 80 ° to 100 °.

8. The traction device of claim 5, wherein the mounting portion further comprises a connecting portion penetrating the mounting hole, one end of the connecting portion is connected to the fixing portion, the other end of the connecting portion is connected to the fastening portion, the fastening portion comprises a supporting portion, a first end portion, a second end portion, and a guiding portion for guiding the fastening portion to penetrate the mounting hole, the supporting portion is connected to the first end portion, the second end portion is provided at a free end of the guiding portion, and the other end of the guiding portion is connected to the first end portion.

9. The traction device of claim 8, wherein the guide portion includes a first guide surface and a second guide surface, the first guide surface being connected to the first end portion, the second guide surface being connected to the second end portion, an outer dimension of a connection of the first end portion to the first guide surface to the second guide surface perpendicular to the installation direction gradually increasing, and an outer dimension of a connection of the first guide surface to the second end portion perpendicular to the installation direction remaining unchanged.

10. The traction device of claim 1, wherein a cross section of the mounting portion passing through the invisible appliance is a non-circular structure that prevents relative rotation with the invisible appliance, and wherein the cross section of the mounting portion passing through the invisible appliance is configured to match a shape of the mounting hole provided on the invisible appliance.

11. A shell-shaped dental appliance, comprising a concealed appliance and a traction device according to any one of claims 1 to 10, wherein the concealed appliance is provided with a mounting platform for mounting the traction device, the mounting platform and the concealed appliance are integrally formed and are arranged on the outer surface of the concealed appliance in a protruding manner, and the traction device is fixedly connected to the concealed appliance after passing through a mounting hole on the mounting platform on the concealed appliance.