CN219895961U - Dental instrument with traction function - Google Patents

Abstract

The utility model provides a dental instrument with a traction function, which comprises a shell-shaped body, wherein the shell-shaped body is provided with a plurality of tooth accommodating cavities, the outer surface of at least one tooth accommodating cavity protrudes into a base part in the far tooth direction, the side surface of the base part is provided with a containing groove for hanging a traction piece, the position of the containing groove is staggered with the traction direction, and the cross section area of the base part is gradually reduced or kept unchanged along the protruding and extending direction. In the embodiments of the utility model, the convex shape is added at the position of the tooth accommodating cavity surface, which needs to be hung with the traction piece such as the rubber band, so that a gap is formed between the traction piece and the tooth; the space is reserved for the installation of the follow-up rubber band, and meanwhile, the structural design position of the base part can avoid local deformation of a pulled part after the rubber band is installed on the shell-shaped body, so that the correction result is more accurate and stable.

Description

Dental instrument with traction function

Technical Field

The embodiment of the utility model relates to the technical field of tooth orthodontics, in particular to a dental instrument with a traction function.

Background

The traditional tooth correction technology generally adopts brackets and steel wires to enable teeth to move, so that the purpose of correcting malocclusion is achieved. However, such brackets and wires are too much and too obvious, which can be very aesthetically damaging and can cause oral damage such as gingivitis, tooth demineralization, discoloration, etc. On the basis, an invisible tooth correcting system is generated, and the invisible shell-shaped tooth correcting device made of elastic transparent polymer materials is adopted for realizing tooth movement. The whole correction process hardly affects daily life and social contact, and meanwhile, the patient can take the correction process by himself, so that the correction process is convenient for daily oral health maintenance.

In dental clinical orthodontic treatment, in a scheme of orthodontic treatment or orthognatic treatment using shell-shaped dental appliances, a functional attachment is sometimes used to enhance an orthodontic effect. Common functional attachments include traction structures for suspending the traction elements such that traction forces act on the respective locations. In many cases, such as anterior depression, tooth extension, gap adjustment, eruption traction, tooth torsion, etc., an adjuvant treatment with the aid of a traction structure is required.

In the prior art, a small gap (namely a traction hook) is formed on a tooth position to be traction on the invisible appliance, when the appliance is worn, the traction part is hung on the traction hook to realize the retention of the traction part, and the other side is hung on other traction hooks or lingual buckles to realize the traction between teeth or jaw positions. However, this method has the following problems: the appliance is made by film pressing according to the tooth shape of a patient, the inner side of the appliance is closely contacted with the teeth in the process of wearing the appliance, and the traction piece is placed between the teeth and the appliance to press the teeth and the appliance; in addition, when the traction force is too large, the edge of the appliance is outwards raised to form a tilted edge, so that the oral mucosa is easily scratched. Meanwhile, when the traction piece is arranged in the traction hook of the appliance, the position of the traction piece can be maintained to be fixed only by means of the self elasticity of the traction piece, and the traction piece is easy to bump off in the chewing or speaking process of a patient, so that the use feeling and the correction effect are affected.

Accordingly, there is a need for a dental appliance that is more comfortable and that is capable of providing traction stably, thereby improving the accuracy of the appliance.

Disclosure of Invention

The embodiment of the utility model aims to provide a dental appliance with a traction function, which solves the problems that in the prior art, a traction piece is easy to fall off from an invisible appliance or the traction force is formed by locally deforming the invisible appliance in the use process, so that the correction precision is not high and the like.

In order to achieve the above-mentioned object, an embodiment of the present utility model provides a dental appliance with a traction function, including a shell-shaped body, wherein the shell-shaped body is provided with a plurality of tooth receiving cavities, at least one surface of the tooth receiving cavities protrudes into a distal tooth direction to form a base, a side surface of the base is provided with a receiving groove for hanging a traction member, and the position of the receiving groove is staggered with the traction direction, wherein the cross-sectional area of the base is gradually reduced or kept unchanged along the protruding direction.

Preferably, the height of the projections of the base in the projection direction is between 1.5mm and 2 mm.

Preferably, the accommodating groove is arranged adjacent to the tooth surface.

Preferably, the height of the accommodating groove in the protruding direction is not more than 1/2 of the total height of the base.

Preferably, the base is spaced apart from the gingival and incised ends of the shell-like body, respectively.

Preferably, in the vertical direction, the tooth long axis direction or the direction perpendicular to the base long axis direction, the lowest point of the edge of the base is 1-2mm away from the gum line.

Preferably, in the vertical direction, the tooth long axis direction or the direction perpendicular to the base long axis direction, the highest point of the edge of the base is not contacted with the opposite jaw teeth during occlusion.

Preferably, the accommodating groove is a groove structure concavely formed towards the traction direction.

Preferably, the receiving groove has an opening structure formed on the side surface of the base.

Preferably, the depth of the accommodating groove in the traction direction is 1/3-1/2 of the length of the base part in the traction direction.

Preferably, the base portion has a cavity structure formed by protruding a labial surface of the corresponding tooth-receiving cavity in a distal tooth direction.

Preferably, the base is a solid structure formed by protruding the labial surface of the corresponding tooth-receiving cavity in the distal tooth direction.

Preferably, the longitudinal axis of the cross-sectional shape of the base portion in the towing direction is parallel to the towing direction.

Preferably, the overall shape of the base is a cylinder or a truncated cone.

Preferably, the base has an elliptical shape as a whole.

Preferably, the stiffness of the base is greater than the stiffness of the shell-like body.

Compared with the prior art, the dental instrument with the traction function has at least the following beneficial effects:

the technical aim is to improve the existing invisible appliance shape, the base part of the containing groove with the hanging traction piece is added on the surface of the invisible appliance, and the position of the containing groove and the direction of the traction force are arranged in a staggered mode, so that the traction force can fully act on the direction of teeth to be moved, and component force or component moment in other directions are not generated. In addition, the cross-sectional area of the base part is gradually reduced or kept unchanged along the protruding direction, namely, the relatively larger cross-sectional area is arranged at the accommodating groove for hanging the traction part, and the local deformation resistance of the invisible appliance at the base part in the traction process can be improved on the premise that the wearing comfort of the appliance is not affected by the protruding structure, so that the correction precision is ensured. Likewise, the convex shape of the base can enable the accommodating groove to form a gap between the invisible appliance and the teeth; the space is reserved for the installation of the subsequent traction piece, so that the compression of the traction piece to teeth after the traction piece is installed is avoided, and the comfort in the correction process is improved.

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 illustration of a dental implement having a traction function in some embodiments of the present utility model;

FIG. 2 is a schematic top view of a dental implement having a traction function according to further embodiments of the present utility model;

FIG. 3 is a view of a dental instrument having traction in accordance with further embodiments of the present utility model;

FIG. 4 is a schematic view of a dental implement having a traction function according to further embodiments of the present utility model;

FIG. 5 is a schematic view of a dental implement having a traction function according to further embodiments of the present utility model;

FIG. 6 is a schematic view of a dental implement having a traction function according to further embodiments of the present utility model;

FIG. 7 is an enlarged partial view of region B of FIG. 6;

FIG. 8 is an enlarged partial view of region B of FIG. 6;

FIG. 9 is a simplified schematic of the structure of a base in some embodiments of the utility model;

FIG. 10 is a simplified schematic of the structure of a base in some embodiments of the utility model;

fig. 11 is a schematic view of a dental implement having a traction function according to further embodiments of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present utility model. However, the claimed utility model may be practiced without these specific details and with various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not be construed as limiting the specific implementation of the present utility model, and the embodiments can be mutually combined and referred to without contradiction.

The "posterior tooth region" referred to in the various embodiments of the present utility model is defined according to classification of teeth including premolars and molar, shown as 4-8 teeth in FDI notation, and anterior tooth region FDI notation as 1-3 teeth in pages 36-38 of the "oral medicine guide" 2 nd edition published by the medical press of beijing university. The teeth of the anterior teeth area include central incisors, lateral incisors, and cuspids. In addition, referring to teeth in the deciduous stage, the "posterior tooth area" is defined according to the classification of deciduous teeth including deciduous incisors, deciduous cuspids and deciduous molars, wherein deciduous incisors include deciduous intermediate teeth and deciduous side incisors, and deciduous molars include first deciduous molars and second deciduous molars, published by the university of Beijing medical press, 2 nd edition, pages 40-41.

Referring to fig. 1, in one embodiment of the present utility model, a dental appliance with a traction function is provided, which includes a shell-shaped body 1, wherein the shell-shaped body 1 is provided with a plurality of tooth receiving cavities 11 for wrapping teeth, the outer surface of at least one tooth receiving cavity 11 protrudes in the distal direction to form a base 12 integrally, the process is reduced by the integral molding design, the processing efficiency is improved, and the stability of the base 12 is ensured by the integral design.

With continued reference to fig. 2, the side surface of the base 12 is provided with a receiving groove 121 for hanging the traction member 2, and the position of the receiving groove 121 is offset from the traction direction, so that the traction member 2 does not fall out of the receiving groove 121 during traction. Specifically, when the traction force needs to be set in the distal direction, the accommodating groove 121 is designed on the proximal surface of the base 12; or when the vertical traction between jaws is required, the traction force needs to be set in the direction of the opposite jaw, so the setting position of the receiving groove 121 needs to be the side surface of the base 12 away from the opposite jaw.

The shell-shaped body 1 is designed and manufactured into a series of ordered transparent movable appliance by means of a computer three-dimensional reconstruction, aided diagnosis design technology and a computer manufacturing technology, and the appliance for correcting the dental deformity is realized by utilizing the resilience force generated by the elastic deformation of the appliance material, is a continuous ordered appliance, and achieves the aim of correcting the teeth by continuous small-range tooth movement.

In some embodiments, referring to fig. 3, in the dental appliance with the traction function of the present utility model, after the patient wears the dental appliance, one side of the traction element 2 is hung at the accommodating groove 121, and the other side is hung on the other base 12 or the anchorage to realize auxiliary traction, specifically, the traction element can guide the teeth to gradually change from the initial position to the target correction position. The initial position can be the relative position of a digital model acquired when a patient carries out medical treatment, and the target correction position can be the position of a final correction effect according to patient requirements and intraoral conditions through doctors and medical designers.

In some embodiments, referring to fig. 4 and 5, the base 12 may be disposed on the labial, buccal or lingual surfaces of the tooth receiving cavities 11, where the base 12 may be disposed at a gap from two of the tooth receiving cavities 11 to accommodate any type of traction required during the appliance (type ii traction, type iii traction, vertical traction, diagonal traction, interactive traction, etc.).

In an actual appliance scenario, the force generated by the traction of the base 12 is transferred to the shell-shaped dental appliance, which may affect the mechanical properties of the shell-shaped dental appliance, such as causing undesirable large deformation of the shell-shaped dental appliance, and worse, may cause breakage of the shell-shaped dental appliance. Thus, how to reduce or avoid the impact of such forces on the shell-like dental appliance when being pulled is critical to the effectiveness of the appliance. Embodiments of the present utility model provide a consistent traction force to the appliance by reducing or avoiding the impact of such forces on the shell appliance as it is being pulled by the design of the base 12 and the pocket 121.

In some embodiments, referring to fig. 6 and 7, the cross-sectional area of the base 12 decreases or remains constant along the direction of protrusion X, and in particular, the cross-section of the base 12 decreases or remains constant along the direction of protrusion X is taken by a plane A-A perpendicular to the direction of protrusion.

In some embodiments, referring to fig. 1, the base 12 is disposed at a distance from the gingival and incisal ends, respectively, of the shell-like body 1. In the vertical direction, the tooth long axis direction at the corresponding position or the direction perpendicular to the long axis of the base 12 can be adopted, and the distance between the lowest point of the edge of the base 12 and the gum line is 1-2 mm. The damage to the edge of the appliance and the compression to teeth and gums can be reduced, and the problems of edge warping, deformation and pulling piece 2 falling off in the wearing process of the appliance are avoided.

In addition, in the vertical direction (Y direction in fig. 1), the long axis direction of the teeth at the corresponding position, or the direction perpendicular to the long axis of the base 12, the highest point of the edge of the base 12 is not in contact with the opposite teeth during occlusion. The base 12 should not interfere with the normal occlusal relationship of the teeth when used as a traction function, so that the highest point of the edge of the base 12 does not contact the opposing jaw teeth during occlusion, thereby reducing occlusal interference that may occur with the placement of the base 12. In addition, in the embodiments of the present utility model, the lowest point and highest point of the base 12 are mainly points on the base 12 that are near one end of the gum, which are called the lowest points, and points on the base 12 that are far from the gum and adjacent to the teeth of the opposite jaw are the highest points.

In some embodiments, referring to FIG. 8, the base 12 has a protrusion height H in the protrusion direction of between 1.5mm and 2 mm. The raised base 12 allows the traction portion of the shell-like body 1 to be larger in surface, enabling higher traction strength to be provided. But the height of the bulge of the base 12 is not easy to be too high, the bulge height H is between 1.5mm and 2mm, the scratch of the base 12 to the oral mucosa can be reduced, and the comfort of correction is improved.

In some embodiments, referring to fig. 9, the long axis of the cross-sectional shape of the base 12 along the pulling direction is parallel to the pulling direction. When the base 12 has an overall shape of a cylinder or a truncated cone, and a cross-sectional shape of a perfect circle, any diameter of the perfect circle may be used as the long axis of the cross-sectional shape. In a more preferred embodiment, the base 12 has an elliptical cross-sectional shape along the traction direction, and the major axis of the ellipse is parallel to the traction direction. Within a certain size range, how to design the shape of the base 12 to ensure that traction is provided is also an important consideration in the present utility model. The long axis of the cross section shape is parallel to the traction direction, so that the integral deformation resistance of the base 12 in the traction process can be effectively improved, stable traction force can be provided in the use process, and the correction effect is improved.

In some embodiments, with continued reference to fig. 9, the receiving groove 121 is disposed adjacent to the facing surface. And the height H of the receiving groove 121 in the protruding direction is not more than 1/2 of the entire height H of the base 12. The advantage of the placement of the receiving groove 121 adjacent to the tooth surface is that it is possible to apply traction forces more directly to the tooth through the shell-like body 1 without generating undesired force components or moments. The arrangement of the accommodating groove 121 adjacent to the tooth surface not only ensures the traction effect of the base 12, but also can realize the overall size control of the base 12 so as to avoid the undesired deformation of the partial area of the appliance to the greatest extent, and finally realize the purposes of improving the correction effect and expanding the correction application range.

In some embodiments, referring to fig. 10, the depth L1 of the receiving groove 121 in the traction direction is 1/3-1/2 of the length L of the base 12 in the traction direction. The depth of the receiving groove 121 is designed to satisfy the requirement of not only receiving the size of the traction member 2 commonly used in clinical dental appliance, but also ensuring that the base 12 is not deformed during traction, so that the length L of the base 12 in the traction direction is between 2.6 and 4mm, and the depth L1 of the receiving groove 121 in the traction direction is 1/3 to 1/2 of the length L of the base 12 in the traction direction, preferably, the depth L1 of the receiving groove 121 in the traction direction is between 0.9mm and 2 mm.

In some embodiments, the base 12 may be a cavity structure integrally formed with the shell-shaped body 1 through a hot-pressing film process, the accommodating groove 121 is a groove structure formed by recessing a side surface of the base 12 toward a traction direction, and the traction member 2 such as a rubber band is fixed at the groove structure. The integrated forming can improve the connection stability of the two, reduce the process flow and further improve the preparation efficiency of the dental instrument with the traction function.

Or the accommodating groove 121 is an opening structure formed on the side surface of the base 12, and can be formed by introducing the dental model data of the patient into a system to generate each step of dental model in the processing process of the appliance, and the system places the base 12 on each step of dental model according to the medical correction scheme. When placed, the base 12 is placed in contact with the center of the tooth surface, and the direction of the accommodating groove 121 is opposite to the traction direction. After the shape of the appliance is obtained through 3D printing and film pressing, an opening structure is obtained through a cutting process, and the opening structure is an arc opening in a preferred mode, so that the problem that the base 12 is deformed due to stress concentration in the traction process is solved.

In other embodiments, the dental appliance with traction may be directly created using additive manufacturing. The resulting base 12 may be a solid structure as shown in fig. 11 or a hollow structure as shown in fig. 4 to 7. Also, in order to further increase the deformation resistance of the base 12, the rigidity of the base 12 may be made larger than that of the shell-like body 1. For example, the elastic modulus of the material of the base 12 is greater than the elastic modulus of the material of the shell-like body 1. Alternatively, the thickness of the base 12 may be slightly greater than the thickness of the shell-like body 1, for example, the thickness of the shell-like body 1 is in the range of 0.5mm-1.0mm, and the thickness of the base 12 is in the range of 0.55mm-1.05 mm. Alternatively, the base 12 may be a multi-layered structure, which enhances the strength of the base 12, thereby enhancing the resistance of the base 12 to deformation.

It should be noted that, under the condition of no contradiction, the above examples can be freely combined according to needs to form different new embodiments, and the embodiments formed by the combination are all within the protection scope of the present utility model, and are not described herein in detail for the sake of saving the text of the application.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Likewise, the foregoing is merely specific embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (16)

1. The utility model provides a dental instrument with traction function, includes shell form body, shell form body is equipped with a plurality of teeth and accomodates the chamber, its characterized in that, at least one tooth accomodates the outward appearance in chamber and to the protrusion of far away tooth direction an organic whole formation basal portion, the side surface of basal portion is equipped with the accommodation groove that is used for hanging the traction element, the position of accommodation groove with traction direction dislocation set, wherein the cross-sectional area of basal portion reduces gradually or keeps unchanged along protruding stretching direction.

2. The dental instrument with traction according to claim 1, wherein the base has a protrusion height in the protrusion direction of between 1.5mm-2 mm.

3. The dental instrument with traction according to claim 2, wherein the receiving slot is disposed adjacent to the facing.

4. A dental instrument with traction according to claim 3, wherein the height of the receiving groove in the protruding direction is not more than 1/2 of the overall height of the base.

5. The dental instrument with traction according to claim 1, wherein the base is disposed at a distance from the gingival and incised ends of the shell-like body, respectively.

6. The dental appliance with traction according to claim 4, wherein the lowest point of the base edge is between 1-2mm from the gum line in the vertical direction.

7. The dental instrument with traction according to claim 4, wherein the highest point of the base edge in the vertical direction is not in contact with the opposing jaw teeth during occlusion.

8. The dental instrument with traction function according to claim 1, wherein the receiving groove is a groove structure formed to be concave toward the traction direction.

9. The dental instrument with traction according to claim 1, wherein the receiving groove is an open structure formed in the base side surface.

10. The dental instrument with a pulling function according to claim 7 or 8, wherein the depth of the receiving groove in the pulling direction is 1/3-1/2 of the length of the base in the pulling direction.

11. The dental appliance with traction function according to claim 7 or 8, wherein the base is a cavity structure formed by protruding a labial surface of the corresponding tooth receiving cavity in a distal tooth direction.

12. The dental instrument with traction function of claim 8, wherein the base is a solid structure formed by the lip side of the corresponding tooth receiving cavity protruding in a distal direction.

13. The dental instrument with traction function according to claim 1, wherein a long axis of a cross-sectional shape of the base along the traction direction is parallel to the traction direction.

14. The dental instrument of claim 13, wherein the base has an overall shape of a cylinder or a truncated cone.

15. The dental instrument with traction of claim 13, wherein the overall shape of the base is elliptical.

16. The dental instrument with traction function of claim 1, the base having a stiffness greater than a stiffness of the shell body.