CN113499154A

CN113499154A - Dental appliance and preparation method thereof

Info

Publication number: CN113499154A
Application number: CN202110959398.1A
Authority: CN
Inventors: 宋维刚; 宋时来
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-10-15

Abstract

The invention discloses a dental appliance and a preparation method thereof, and relates to the technical field of dental appliance. It comprises a thermoplastic membrane formed on the oral dentition model by plastic suction; the thermoplastic membrane is provided with a positioning part for clamping the dental crown; the positioning part of the thermoplastic membrane is also provided with a buffer part which is positioned in the moving direction of the teeth to be corrected; the thermoplastic film is a transparent thermoplastic film. The dental appliance provided by the invention has low cost and low requirement on technicians of a manufacturing party, also greatly improves the attractiveness and comfort of the dental appliance, and has good market application prospect.

Description

Dental appliance and preparation method thereof

Technical Field

The invention relates to the technical field of orthodontics, in particular to an orthodontics device and a preparation method thereof.

Background

Along with the improvement of the attention degree of people to the tooth attractiveness, people also deepen the research of the tooth correction technology gradually, and different correction methods are generally adopted for different malocclusion deformities. Among them, deep occlusions, reverse occlusions, locked occlusions and missing teeth cause tooth displacement, which is a common symptom in malocclusions and malformations.

Currently, there are many clinical orthodontic methods. Among them, the invisible correcting and treating method has the advantages of comfort, beauty, easy cleaning and the like, and is widely welcomed by patients. However, the invisible correction is a disposable replacement type, and is replaced every two weeks conventionally, and the clinic can not make the invisible correction, so the cost is high, and the invisible correction is difficult for general patients to bear.

In view of this, the invention is particularly proposed.

Disclosure of Invention

The present invention is directed to a dental appliance and a method for manufacturing the same to solve the above-mentioned problems.

The invention is realized by the following steps:

the invention provides a dental appliance, which comprises a thermoplastic membrane formed on an oral dentition model by plastic suction; the thermoplastic membrane is provided with a positioning part for clamping the dental crown; the positioning part of the thermoplastic membrane is also provided with a buffer part which is positioned in the moving direction of the teeth to be corrected; the thermoplastic film is a transparent thermoplastic film.

The inventor provides an adjustable transparent appliance similar to a invisible appliance, which can be used for manufacturing a matched oral dentition model according to the type of teeth to be corrected and can be used for manufacturing a transparent thermoplastic membrane through a plastic suction process. The thermoplastic membrane is provided with the buffer part, so that a certain moving space can be reserved for teeth, and the orthodontic adjustment can contain certain errors. The dental appliance provided by the invention can bear 0.3 mm-0.5 mm of correction displacement each time, has the technical advantage of strong controllability, is simple to manufacture and low in cost, can meet the requirements of consumers, and can be manufactured and adjusted by a primary oral clinic.

In addition, the dental appliance provided by the invention has low cost and low requirement on technicians of a manufacturing party, also greatly improves the aesthetic property and comfort of the dental appliance, and has good market application prospect.

The thermoplastic film is made of thermoplastic polymer, which includes but is not limited to copolyester, polyurethane and polypropylene. The thermoplastic polymer can be Thermoplastic Polyurethane (TPU), alcohol-modified polyethylene terephthalate (PETG), polyethylene 1, 4-cyclohexanedimethanol terephthalate, polyethylene terephthalate (PET), polypropylene (PP), Polycarbonate (PC). The thermoplastic film has good elasticity.

In a preferred embodiment of the present invention, the buffer part is provided at a back side of an engaging surface of the positioning part and the crown in a protruding manner. The projection is feasible as long as it can provide a certain spatial buffer to the advancing direction of the tooth to be moved.

In one embodiment, the height of the buffer part is 1 to several millimeters, and the gap between the buffer part and the tooth part is 1 to several millimeters.

In one embodiment, the cushioning portion may be provided according to the type of tooth displacement caused by deep bite, reverse bite, occlusion, and missing teeth, for example, occlusion deformity may be made by raising the contralateral occlusal surface with a self-setting resin, making the cushioning portion on the orthodontic side, or making the cushioning portion by lowering the occlusion teeth first.

For the anterior teeth scattered in the gap of class 2, a buffer part can be optionally made on the lingual side. For category 3, the cushion portion may be selected on the upper anterior labial side. The lower anterior teeth of type 3 are too long and scattered in gaps, and the lingual side of the lower anterior teeth can be used as a rear oblique buffer part; the trailing skew buffering portion may be a guide plate buffering portion.

In a preferred embodiment of the present invention, the buffer portion is located in a horizontal moving direction or a gingival moving direction of the teeth to be corrected, so that a gap is left in a space for the displacement of the teeth to be corrected.

In a preferred embodiment of the present invention, the positioning portion and the buffering portion are integrally formed; the positioning part extends inwards along the inner tooth surface. The buffering part is prefabricated on the oral dentition model before plastic uptake, and is integrally formed with the positioning part after plastic uptake.

In other embodiments, the length of the positioning portion extending inwardly along the inner tooth surface or not may be adaptively set as desired.

In a preferred embodiment of the present invention, the back side of the engaging surface of the positioning part and the crown has a plurality of teeth, and the number of the teeth is 6-16. The teeth are arranged to frictionally engage with the crowns of the teeth to be corrected. In a specific embodiment, the number of teeth may be set according to the number of teeth to be corrected.

If occlusion interference occurs, a jaw pad is also arranged on the thermoplastic membrane, and the jaw pad is positioned on the surface of the tooth part. The purpose of the jaw pad is to prevent occlusion interference.

In a preferred embodiment of the present invention, the jaw pad is made of self-setting resin. For example, it may be a powder or a liquid, PMMA or MMA.

In a preferred embodiment of the present invention, when the thermoplastic film has both the cushion portion and the jaw pad, the jaw pad and the cushion portion are spaced apart from each other on the back side of the engagement surface.

The surface of the tooth part of the thermoplastic membrane is also provided with an oblique guide which is self-setting resin. In other embodiments, to ensure natural sliding action of the teeth, a diagonal guide is provided on the thermoplastic film to ensure good natural sliding action of the upper or lower teeth.

In one embodiment, the jaw pad and then the bevel guide may be provided on the toothed surface of the thermoplastic film.

The invention also provides a preparation method of the dental appliance, which comprises the steps of taking the thermoplastic polymer as a raw material, buffering in the advancing direction of teeth to be moved, reserving a moving space for the teeth, and preparing the thermoplastic membrane with the buffering part on the oral dentition model by a plastic suction process.

In a preferred embodiment of the present invention, the preparation method further comprises performing thermal stretching adjustment on the prepared thermoplastic film;

preferably, the thermoplastic film prior to thermal stretch adjustment may be mounted with a jaw pad when occlusal interference occurs.

When the class 2 anterior teeth are scattered as the upper anterior teeth or the class 3 lower anterior teeth are too long and scattered in gaps, the thermoplastic membrane can be provided with the oblique guide. The oblique guide is an oblique guide plate.

In one embodiment, the thermal stretching adjustment is performed by using a thermal stretching adjuster on the back side of the tooth moving direction.

The invention has the following beneficial effects:

the invention provides an adjustable transparent appliance similar to a invisible appliance, which can be used for manufacturing a matched oral dentition model according to the type of teeth to be corrected and manufacturing a transparent thermoplastic membrane through a plastic suction process. The thermoplastic membrane is provided with the buffer part, so that a certain moving space can be reserved for teeth, and the orthodontic adjustment can contain certain errors. The heating head of the dental appliance adjustment apparatus of cn201822039288.x may be used to heat the dental appliance such that the dental appliance is engaged with the positioning portion of the crown to form a protruding point, and the protruding point of the dental appliance abuts against the tooth, thereby correcting the tooth. The dental appliance can be adjusted a plurality of times using the dental appliance adjustment apparatus. The dental appliance provided by the invention can bear 0.3-0.5 mm of correction displacement of the dental appliance adjusting equipment each time, has the technical advantage of strong controllability, is simple to manufacture and low in cost, can meet the requirements of consumers, and can be manufactured and adjusted by a primary oral clinic.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a model view of a malocclusion deformity;

FIG. 2 is a model view of a cushioned malocclusion deformity;

FIG. 3 is a thermoplastic film after blister forming;

FIG. 4 is a thermoplastic membrane with jaw pads added;

FIG. 5 is a thermal stretch adjustment diagram;

FIG. 6 is a model view of a negative occlusal deformity;

FIG. 7 is a model view of a cushioned inverse zygosis deformity;

FIG. 8 is the thermoplastic film of FIG. 7 after being blister;

FIG. 9 is the thermoplastic film of FIG. 8 with the jaw pad attached;

FIG. 10 is a model diagram of a class 3 malocclusion, 31.41 underbite;

FIG. 11 is the thermoplastic film of FIG. 10 after being blister;

FIG. 12 is the thermoplastic film of FIG. 11 with the jaw pad attached;

FIG. 13 is a view of the thermal stretch adjustment of FIG. 12;

fig. 14 is a schematic view of a dental appliance.

Reference numerals: 1-a positioning section; 11-a tooth portion; 12-a buffer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

This embodiment provides an appliance comprising a thermoplastic film that is suction molded over an oral dentition model, as shown with reference to figure 14. The thermoplastic membrane is provided with a positioning part 1 for clamping the dental crown; the positioning part 1 of the thermoplastic membrane also has a buffer part 12, and the buffer part 12 is positioned in the moving direction of the teeth to be corrected; the thermoplastic film is a transparent thermoplastic film.

In the present embodiment, the buffer portion 12 is provided in a protruding manner on the back side of the engagement surface between the positioning portion 1 and the crown. The positioning part 1 has a plurality of tooth parts 11 on the back side of the engaging surface with the crown.

In other embodiments, jaw pads (not shown in fig. 14) may also be provided on the surface of the teeth to prevent occlusal interference.

The surface of the tooth part of the thermoplastic membrane is also provided with an oblique guide which is self-setting resin (PMMA). In other embodiments, to ensure natural sliding action of the teeth, a diagonal guide is provided on the thermoplastic film to ensure good natural sliding action of the upper or lower teeth.

The present embodiments also provide methods of making dental appliances. Which comprises the following steps:

(1) taking the model in the mouth and making gypsum substitute. Referring to fig. 1, the left side of fig. 1 shows a lingual model view of malocclusion and the right side shows a labial model view.

(2) The advancing direction of the teeth to be moved is buffered. Referring to fig. 2, the left side of fig. 2 is a lingual model view of the malocclusion with cushioning, and the right side is a labial model view.

(3) After a moving space is left for the teeth, the plastic suction manufacturing is performed (the plastic suction process in the application is the same as the manufacturing method of the pressed film retainer, and the mature process exists in the prior art, and is not described herein again). The thermoplastic film in this example was PETG as the raw material. Fig. 3 is a left side view of the tongue of the thermoplastic film after plastic suction, and a right side view of the lip of the thermoplastic film after plastic suction. The thermoplastic film shown in fig. 3 has a cushion portion.

(4) When occlusal interference is encountered, the jaw pad is made of self-setting resin (PMMA), as shown in FIG. 4.

(5) The thermal stretching adjustment is performed by a dedicated thermal stretching adjuster on the back side in the moving direction, as shown in fig. 5.

In other embodiments, the malocclusion may be achieved by raising the contralateral occlusal surface with self-setting resin, cushioning, blister, and hot stretch adjustment of the corrective side, or by lowering the occlusal surface and then cushioning, blister, and hot stretch adjustment of the contralateral surface without raising the contralateral surface.

For the anterior teeth scattered in the gap of class 2, a buffer part can be optionally made on the lingual side. Plastic sucking, hot stretching and adjusting, if necessary, the tooth socket can be additionally provided with the inclined guide plate by self-solidifying plastics.

For category 3, the cushion portion may be selected on the upper anterior labial side. The class 3 lower anterior teeth are too long and scattered in gaps, and the lingual side of the lower anterior teeth can be buffered by a rear inclined guide plate; plastic sucking, hot stretching, and stacking a front oblique guide plate at the lower front tooth cutting end by self-solidifying resin to make the upper front tooth naturally slide.

Example 2

This example provides a method of making a contra-occlusal deformed dental appliance. Which comprises the following steps:

(1) taking the model in the mouth and making gypsum substitute. As shown with reference to fig. 6.

(2) The advancing direction of the teeth to be moved is buffered. As shown with reference to fig. 7.

(3) And (5) reserving a moving space for the teeth, and then carrying out plastic suction manufacturing. The thermoplastic film in this example was PETG as the raw material. FIG. 8 is a lingual and labial view of the thermoplastic film after blister formation. The thermoplastic film shown in fig. 3 has a cushion portion.

(4) When the occlusal interference is encountered, the jaw pad is made of self-hardening resin, as shown in fig. 9.

(5) The thermal stretching adjustment is performed at the back side in the moving direction with a dedicated thermal stretching adjuster.

Example 3

(1) taking the model in the mouth and making gypsum substitute. Referring to FIG. 10, a model view of a class 3 malocclusion, 31.41 underbite.

(2) And (5) carrying out plastic uptake manufacturing. The thermoplastic film in this example was PETG as the raw material. Fig. 11 is a picture of a thermoplastic film after blister forming.

(3) Adopting self-setting resin (PMMA) to manufacture a jaw pad and obliquely guiding; as shown with reference to fig. 12.

(4) The thermal stretching adjustment is performed by a dedicated thermal stretching adjuster on the back side in the moving direction, as shown in fig. 13.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An orthodontic appliance comprising a thermoplastic film formed by suction molding on an oral dentition model; the thermoplastic membrane is provided with a positioning part for clamping a dental crown; the positioning part of the thermoplastic membrane is also provided with a buffer part which is positioned in the moving direction of the teeth to be corrected; the thermoplastic membrane is a transparent thermoplastic membrane.

2. The dental appliance according to claim 1, wherein the buffer portion is provided in a convex shape on a back side of an engagement surface of the positioning portion and the crown.

3. The appliance according to claim 2, wherein the buffer portion is located in a horizontal moving direction or a gingival moving direction of the tooth to be corrected.

4. The appliance according to claim 3, wherein the positioning portion and the cushioning portion are integrally formed; the positioning part extends inwards along the inner tooth surface.

5. The dental appliance according to claim 1, wherein the back side of the engaging surface of the positioning part with the crown has a plurality of teeth, and the number of the teeth is 6 to 16.

6. The dental appliance according to claim 5, wherein the thermoplastic membrane is further provided with a jaw pad located on a surface of the tooth portion; the jaw pad is self-setting resin.

7. The orthodontic appliance as claimed in claim 6, wherein when the thermoplastic film has both the cushioning portion and the jaw pad, the jaw pad and the cushioning portion are spaced apart from each other on the back side of the engagement surface.

8. The dental appliance according to claim 5, wherein the tooth surface of the thermoplastic membrane is further provided with a bevel guide, and the bevel guide is a self-setting resin.

9. The method for manufacturing a dental appliance according to any one of claims 1 to 8, wherein the method comprises forming a thermoplastic film having a cushioning portion on the dental model of the oral cavity by a blister process using a thermoplastic polymer as a raw material.

10. The method of manufacturing a dental appliance according to claim 9, further comprising thermally stretching the manufactured thermoplastic film;

preferably, a jaw pad or an inclined guide is installed on the thermoplastic film before the thermal stretching is adjusted;

preferably, the thermal stretching adjustment is performed using a thermal stretching adjuster on the back side in the tooth moving direction.