CN105407831A

CN105407831A - Orthodontic aligners

Info

Publication number: CN105407831A
Application number: CN201480028667.0A
Authority: CN
Inventors: 王奉基
Original assignee: Wisebrace Pte Ltd
Current assignee: Wisebrace Pte Ltd
Priority date: 2014-07-10
Filing date: 2014-07-10
Publication date: 2016-03-16
Also published as: SG11201610326VA; WO2016007085A1

Abstract

An orthodontic aligner is formed by producing a virtual 3D model of the dentition of a patient, modifying the virtual model by enlarging the crown of the posterior teeth so that the dimensions of each tooth is slightly enlarged slightly and depressing the area immediately gingival to the most prominent part of the crown, 3D printing the modified virtual model to produce a physical model for the aligner and using the physical model for forming the aligner.

Description

Orthodontic appliance

Technical field

The present invention relates to orthodontic appliance, and relate more specifically to the method for the formation of orthodontic appliance.

Background technology

Orthodontic appliance has been known for many years, and it is as the tooth of a kind of instrument for aligning dislocation and other disease in the denture that can by the position that change patients teeth be treated relevant to tooth and oral cavity.

The original form of orthodontic appliance is formed by tinsel, spring and adjustment screw, they to be inserted in the mouth of patient and to be attached on tooth and apply external force to correct their positions in mouth to other parts of the tooth of dislocation or denture, and they are more coarse and clumsy devices.They are most commonly used to the situation of the tooth deformity as overbite or anti-jaw and other interference feeding process.

Early stage device is normally uncomfortable, inaesthetic, and causes suffering and embarrassment, especially to young patient.

Made many improvement for many years, and current orthodontic appliance is made up of acrylic acid or other plastic materials usually, makes them not too obvious and wear more comfortable.

But problem still occurs.Often need retaining tool to guarantee that keeper stays tram in the patient's mouth, and can not owing to such as chewing or brushing teeth this normal and necessary action and being shifted.

This keeping method is included in the cableties that outside is attached to appliance, such as, by using binding agent, attached in inside in forming process, or attachment is adhered to tooth.These methods are also not exclusively reliable, because they all need additional step, no matter be the fabrication stage when cableties or the application stage in the attachment tool on tooth.In addition, cableties may loosen or fracture, and are likely swallowed by patient.Another the alternative keeping method used forms appliance to extend in gum area, and make insert gum surfaces by appliance and obtain maintenance, this may cause the pain of patient and cause wound to soft tissue.

When therapeutic process advances and the position change of tooth time, all orthodontic appliances all need to be removed to adjust, and this must manually complete.For patient, existing keeping method can make removal and insert very difficult.

Summary of the invention

The invention provides a kind of form of orthodontic appliance of novelty, the puzzlement of the problem be associated with prior art can not be run into, and provide a kind of method manufacturing new appliance.

According to the formation of orthodontic appliance of the present invention be denture by making patient three dimensional virtual models, by increase the hat of at least some backteeth or bizet (that is, molar and premolar teeth) and reduction next-door neighbour gums to the most ledge of crown dummy model is revised in region, the revised dummy model of 3 D-printing is with the physical model made for appliance and use this physical model for the formation of appliance.

The dummy model of the denture of patient is passable, and such as, by oral cavity interscan, scanning dental impression or scanning plaster model obtain.

Appliance itself, preferably by the sheet material of vacuum forming thermoplastic, uses the physical model revised to make, be preferably polyethylene terephthalate glycol modification or another kind of copolyesters sheet material, or the sheet material of other colourless transparent material.

The appliance made will along the revised profile of backteeth, and when being incorporated into the dental arch of patient, Tooth movement after permission is entered appliance to mate completely, Existential Space between tooth and appliance by the tooth crown of increase.This space can allow blood flow in periodontal tissue unobstructedly.Blood flow is vital for the health of tooth and the gratifying progress of orthodontic treatment.Depressed area makes the lip producing inflection on the inner surface of appliance, and it allows appliance to snap fit onto rear tooth, and does not contact with the gums of patient or otherwise affect the gums of patient.

The increase of backteeth virtual image will depend on the size of patients teeth, but may diminish to 0.2 millimeter.

The correction of virtual image of the present invention can be carried out at one or more backteeth of every side in oral cavity.Involved tooth is not necessarily the tooth of tooth identical on every side or identical numbering.

Accompanying drawing explanation

The present invention will be described in greater detail with reference to the attached drawings now by way of example, wherein:

Fig. 1 is the perspective schematic view of gums with upper part of backteeth;

Fig. 2 is the schematic diagram of the shape of dummy model before representing correction;

Fig. 3 is the schematic diagram of the shape representing revised dummy model; And

Fig. 4 is one section that passes rear teeth portion of the appliance using the correction obtained according to the mould of Mold Making of the present invention.

Detailed description of the invention

As shown in Figure 1, the backteeth 1 of people has upper spherical hat or crown 2, and it occupies and is exposed to the only about half of of gums or gums more than 4 dental part, and towards the tapered bottom 3 of root of the tooth (not shown).

As shown in Figure 2, in the first step of method of the present invention, the three-dimensional virtual image of obtained patient's denture.A tooth 1 is only had to be illustrated together with a part for gums 4.

As shown in Figure 3, in the second step of the method, the correction of the virtual image of crown 2 is borders 5 of the image above the full-size by increasing the tooth represented by line A-A a little, and the border slightly reducing the part 3 below line A-A is to form depression 6.

As shown in Figure 4, appliance of the present invention has Part I 7, and it is larger than the crown 2 of tooth 9, and Part II comprises the lip 8 of inflection, and its clip is engaged on the tooth below crown 2, and Part III 9, and it is engaged in the top area of gum surfaces 4.

Claims

1., for the formation of a method for orthodontic appliance, comprise the three dimensional virtual models of the denture making patient, by increasing the crown of at least one backteeth on every side, oral cavity and make the size of each tooth be increased a little and reduce that dummy model is revised in next-door neighbour's gums to the region of the most ledge of crown, the revised dummy model of 3 D-printing uses described physical model for the formation of appliance with making for the physical model of appliance.

2. method according to claim 1, wherein said dummy model is obtained by oral cavity interscan, scanning dental impression or scanning plaster model.

3. method according to claim 1 and 2, wherein said appliance is obtained by the sheet material of vacuum forming thermoplastic.

4. the method according to claim arbitrary in claims 1 to 3, wherein said thermoplastic is colourless transparent material.

5. the method according to claim arbitrary in Claims 1-4, wherein said thermoplastic is the polyethylene terephthalate of glycol modification.

6. the orthodontic appliance produced by the method described in claim arbitrary in claim 1 to 5.

7. an orthodontic appliance, it has Part I (7), described Part I (7) is larger than the crown (2) of tooth (1), Part II comprises lip 8 and the Part III (9) of inflection, lip 8 clip of described inflection is engaged on the tooth of crown (2) below, and described Part III (9) is enclosed within the top area of gum surfaces (4).