CN211300422U

CN211300422U - Shell-shaped tooth orthodontic appliance

Info

Publication number: CN211300422U
Application number: CN201921777131.5U
Authority: CN
Inventors: 李俊生; 周可拓; 黄雷
Original assignee: Wuxi Times Angel Biotechnology Co ltd
Current assignee: Wuxi Times Angel Biotechnology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-08-21
Anticipated expiration: 2029-10-22

Abstract

An aspect of the utility model provides a shell-shaped tooth orthodontic appliance, it includes: n shell form orthodontic appliances one by one correspond N and correct the step one by one respectively, each of N shell form orthodontic appliances is used for repositioning the tooth to should correspond the target overall arrangement who corrects the step from the initial overall arrangement that corrects the step correspondingly, each of N shell form orthodontic appliances is equipped with the jaw board in back tooth district, with the jaw board cooperation to the jaw, upper and lower jaw along the relative position of fore-and-aft when adjusting the occlusion, wherein, the local height of the jaw board of N shell form orthodontic appliances reduces along with the extension of relative jaw tooth in the correction process with it, in order to avoid hindering the extension to the jaw tooth, wherein, N is for being greater than 3 natural number.

Description

Shell-shaped tooth orthodontic appliance

Technical Field

The present invention generally relates to a shell-shaped orthodontic appliance, and more particularly to a shell-shaped orthodontic appliance having a jaw plate.

Background

Shell-like orthodontic appliances (e.g., invisible appliances) based on polymeric materials are becoming increasingly popular because of their aesthetic, convenient, and cleaning benefits.

Orthodontic treatment using shell orthodontic appliances typically requires a plurality of successive shell orthodontic appliances, for example, more than 20, or even more than 40. In some cases, the anterior mandible is required at a certain stage of orthodontic treatment, and then jaws (twins-blocks) are required to be arranged on a plurality of successive upper and lower jaw shell-shaped orthodontic appliances corresponding to the stage.

In the conventional scheme, the shapes of the jaw plates are kept unchanged after being selected, namely the shapes of the jaw plates on a plurality of successive orthodontic appliances in the shape of a maxilla shell are consistent, and the shapes of the jaw plates on a plurality of successive orthodontic appliances in the shape of a mandible are consistent. Furthermore, the position of the jaw plate on the shell-shaped orthodontic appliance is generally determined by manual operation, and the relative positions of the jaw plate on a plurality of successive shell-shaped orthodontic appliances and the corresponding teeth are consistent. The inventors have found through extensive studies that these may cause the following problems: firstly, in some cases, it is necessary to extend the opposite jaw teeth of the jaw plate, if the jaw plate is not changed in shape, on one hand, the jaw plate will prevent the teeth from extending, on the other hand, due to the extension of the teeth, the contact between the jaw plate and the opposite jaw teeth is not uniform, which will cause the jaw plate to be stressed intensively and easily damaged, and on the other hand, due to the extension of the teeth, the height of the pad between the upper jaw and the lower jaw will be changed, which may be unfavorable for correction; (II) under some conditions, the position of the teeth provided with the jaw plate may be changed due to the correction, and the position of the jaw plate is changed due to the relative position of the jaw plate and the corresponding teeth being unchanged, so that the matching between the upper jaw plate and the lower jaw plate may be changed along with the correction, and the correction effect cannot be ensured; and (III) under some conditions, the distance between the teeth of the jaw plate is possibly changed due to correction, and if the length of the jaw plate is not changed, the jaw plate cannot be fully supported by the teeth, so that the overall strength of the jaw plate is influenced.

Further, the inventors of the present application have found that the conventional jaw plate has a weak structural strength and insufficient ability to receive a thrust force from the jaw plate.

In view of the above, there is a need to provide a new shell-like orthodontic appliance.

SUMMERY OF THE UTILITY MODEL

In some embodiments, the partial height of the jaw plate of the N shell-like dental orthodontic appliances increases as the opposing jaw teeth are depressed during the correction process.

In some embodiments, the local height of the jaw plate of the N shell-shaped orthodontic appliances varies with the length of the opposing pair of jaw teeth during the appliance such that upon occlusion, the jaw plate is in substantially uniform contact with the pair of jaw teeth while maintaining the height of the pad between the upper and lower jaws substantially constant.

In some embodiments, the relative positions of the jaw plate and the teeth provided with the jaw plate of the N successive shell-shaped orthodontic appliances are changed along with the position change of the teeth in the correction process, so that the relative position relationship of the upper jaw and the lower jaw is basically consistent with the target when the teeth are occluded, and the inclined guide surfaces of the jaw plates are fully contacted with the inclined guide surfaces of the jaw plates.

In some embodiments, the length of the jaws of the N successive shell orthodontic appliances varies as the spacing between the teeth on which the jaws are disposed varies, such that the jaws of the N successive shell orthodontic appliances are each adequately supported by the teeth.

In some embodiments, the width of the jaws of the N shell orthodontic appliances gradually narrows from the lead slope to the other end.

In some embodiments, each of the N shell-shaped orthodontic appliances is provided with a jaw plate at both lateral posterior tooth zones.

In some embodiments, the N shell dental orthodontic appliances are maxillary appliances for mating with a jaw plate of an opposing jaw to lead a lower jaw.

In some embodiments, each of the N shell orthodontic appliances is a unitary shell.

In some embodiments, in the N successive correction steps, an initial layout of an mth correction step is the same as a target layout of an M-1 correction step, and a target layout of an mth correction step is the same as an initial layout of an M +1 correction step, where M is less than N.

Drawings

The above and other features of the present application will be further explained with reference to the accompanying drawings and detailed description thereof. It is appreciated that these drawings depict only several exemplary embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope. The drawings are not necessarily to scale and wherein like reference numerals refer to like parts, unless otherwise specified.

FIG. 1 schematically illustrates a shell-like orthodontic appliance in one embodiment of the present application;

FIG. 2A schematically illustrates a jaw plate in one embodiment of the present application in contact with the teeth of the jaw prior to extension of the teeth and in opposition thereto;

FIG. 2B schematically illustrates the prior art jaw plate after the teeth have been elongated and in opposing contact relationship with the teeth of the jaw;

FIG. 2C schematically illustrates the jaw plate in one embodiment of the present application after the teeth are elongated and in contact relationship with the opposing jaw teeth;

FIG. 3A schematically illustrates the jaw plate in one embodiment of the present application in a position relative to the teeth prior to the teeth being spaced apart;

FIG. 3B schematically shows the position of the existing jaw plate relative to the teeth after the teeth are spaced apart from each other;

FIG. 3C schematically illustrates the jaw plate in one embodiment of the present application after the teeth of the jaw plate are spaced apart to increase their position relative to the teeth; and

fig. 4 schematically illustrates a maxillofacial morphology of a jaw plate in one embodiment of the present application.

Detailed Description

The following detailed description refers to the accompanying drawings, which form a part of this specification. The exemplary embodiments mentioned in the description and the drawings are only for illustrative purposes and are not intended to limit the scope of the present application. Those skilled in the art, having benefit of this disclosure, will appreciate that many other embodiments can be devised which do not depart from the spirit and scope of the present application. It should be understood that the aspects of the present application, as described and illustrated herein, may be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are within the scope of the present application.

Orthodontic treatment using shell-shaped orthodontic appliances divides the treatment into successive N correction steps, each correction step corresponding to one shell-shaped orthodontic appliance for repositioning teeth from an initial layout of the correction step to a target layout of the correction step. Basically, the initial layout of the mth correction step is the target layout of the mth-1 correction step, and the target layout of the mth correction step is the initial layout of the mth +1 correction step.

For some cases, for example, there are cases in the "Tianbao" situation, the front lower jaw is needed while orthodontic treatment, and then the jaws are arranged on the corresponding upper and lower jaw shell-shaped orthodontic appliances at least in a certain correction stage, so that in the occlusion state, the lower jaw is pushed forward through the interaction of the jaws on the upper and lower jaw shell-shaped orthodontic appliances.

Currently, the most common method of making shell orthodontic appliances is a hot-press film forming process. In the existing scheme, when a shell-shaped orthodontic appliance with a jaw plate is manufactured, the jaw plate is generally added on a three-dimensional digital model of teeth through manual operation, and then a series of successive three-dimensional digital models of teeth which correspond to a series of successive tooth layouts one by one are obtained through tooth arrangement based on the three-dimensional digital model of the teeth with the jaw plate added. Then, using the series of successive three-dimensional digital models of the teeth, a series of successive positive molds of the teeth are created. Finally, pressing films on the series of successive male molds of the teeth by a hot-pressing film forming process to obtain a series of successive shell-shaped orthodontic appliances with jaw plates.

That is, in the conventional proposal, the jaw plates of a series of successive shell-shaped orthodontic appliances are identical in shape and size, and the relative positions of the jaw plates of the series of successive shell-shaped orthodontic appliances and the teeth on which the jaw plates are provided are also identical. This may lead to the above-mentioned problems found by the inventors.

In one embodiment, the size of the jaws can be defined as follows: the jaw plate is wide along the size of the tongue and cheek direction; the size of the jaw plate along the direction of the near-far middle is the length; the jaw plate has a height dimension along the occlusal direction.

Through a large amount of research and development work, the inventor of the application develops a new shell-shaped orthodontic appliance, which comprises a plurality of successive upper jaw shell-shaped orthodontic appliances and a plurality of successive lower jaw shell-shaped orthodontic appliances, each pair of upper and lower jaw shell-shaped orthodontic appliances is provided with a matched jaw plate, and the lower jaw is guided by the mutual matching of the jaw plates arranged on the upper and lower jaw shell-shaped orthodontic appliances. On the one hand, the morphology of the jaw plates of these maxillary and/or mandibular shell orthodontic appliances varies with the elongation of the opposing jaw teeth relative thereto to avoid obstructing the elongation of the jaw teeth and to keep the mandibular rest height unchanged; on the other hand, the relative position between the jaw plate of the shell-shaped orthodontic appliance and the teeth provided with the jaw plate changes along with the positions of the teeth so as to ensure good matching between the jaw plates of the upper and lower jaw shell-shaped orthodontic appliances and lead the lower jaw to the target position; in yet another aspect, the length of the maxillary and/or mandibular shell orthodontic appliances varies with the spacing of the overlying teeth to ensure that the maxilla pad is adequately supported by the teeth, thereby ensuring the overall strength of the maxilla pad; in yet another aspect, the width of the jaw plate of the maxillary or mandibular shell orthodontic appliance tapers in the buccal direction from the end in contact with the opposing jaw plate to the other end to enhance the force strength of the jaw plate along the curve of the dental arch.

Referring to fig. 1, upper and lower shell

orthodontic appliances

110 and 120 of one embodiment of the present application are schematically illustrated in a matched pair. The maxillary shell orthodontic appliance 110 is a one-piece shell forming a tooth receiving cavity wherein the geometry of the cavity is such that it can reposition maxillary teeth from one configuration to another. Mandibular shell orthodontic appliance 120 is a one-piece shell that forms a cavity that receives the teeth wherein the geometry of the cavity is such that it repositions the mandibular teeth from one configuration to another. The maxillary shell orthodontic appliance 110 has jaws 111 at the posterior areas of both sides, and the mandibular shell orthodontic appliance 120 has jaws 121 at the posterior areas of both sides, and when biting, the guide slope 1111 of the maxillary plate 111 and the guide slope 1211 of the mandibular plate 121 are sufficiently contacted and abutted to guide the mandible forward.

In some cases, it is desirable to lead the mandible to a specific position throughout the orthodontic treatment; in still other cases, it is only necessary to lead the mandible to a specific position at some stage of orthodontic treatment; in still other cases, it is desirable to lead the mandible to different positions at different stages of orthodontic treatment. It will be appreciated that the shell orthodontic appliance of the present application can be adapted to these various situations.

Referring to fig. 2A, a jaw plate 201 of a shell-shaped orthodontic appliance is schematically shown prior to extension of teeth 203 in an embodiment of the present application, wherein occlusal surfaces of the jaw plate 201 are in uniform contact with opposing

jaw teeth

203 and 205 in an occluded state.

Referring to fig. 2B, the jaw plate 201' is shown in schematic contact with the opposing

jaws

203 and 205 when the teeth 203 are extended and the existing shell orthodontic appliance is worn. The jaw plate of the existing shell-shaped orthodontic appliance remains unchanged in shape throughout the entire appliance, however, since the teeth 203 have been elongated and the heights of the corresponding portions of the jaw plate 201 ' have not changed, there is still a gap between the teeth 205 and the jaw plate 201 ' when the teeth 203 are in direct contact with the jaw plate 201 '. Thus, on the one hand, the jaw plate 201' can hinder the elongation of the tooth 203; on the other hand, the jaw pad 201' may affect the correction effect by raising the height of the mandible to be greater than a predetermined height; in yet another aspect, this contact relationship makes the jaw plate 201' susceptible to damage from concentrated forces.

Referring to fig. 2C, the jaw plate 201 "is shown schematically in contact with the opposing

jaws

203 and 205 when the shell orthodontic appliance of the present application is worn after the teeth 203 are extended. The shape of the jaw plate of the shell-shaped orthodontic appliance of the present application is adjusted according to the elongation of the jaw teeth, the teeth 203 are elongated, and the height of the portion of the jaw plate 201 ″ corresponding to the teeth 203 is reduced compared to the jaw plate 201, so that the jaw plate 201 ″ is still in uniform contact with the elongated teeth 203 and teeth 205 when biting.

It will be appreciated in the light of this application that in addition to the elongation of the teeth, in some cases it may be desirable to lower the opposing jaw teeth relative to the jaw plate, and that in order to ensure that the jaw plate is in uniform contact with these teeth and that the height of the pad between the upper and lower jaws is constant, the local height of the corresponding portion of the jaw plate may be correspondingly increased. This enables on the one hand a more comfortable chewing for eating when wearing the shell-like orthodontic appliance and on the other hand an additional depression of the teeth of the jaw.

Referring to fig. 3A, a jaw plate 301 of a shell-like orthodontic appliance is schematically illustrated prior to distal movement of a tooth 303 in an embodiment of the present application, wherein the jaw plate 301 is supported by the

teeth

303, 305, 307, and 309 in an occlusal state, wherein the tooth 303 is the endmost posterior tooth.

Referring to fig. 3B, the position relationship between the jaw plate 301' and the teeth 303-309 is schematically shown when the existing shell-shaped orthodontic appliance is worn after the tooth 303 is moved away. In the whole correction process, the length of the jaw plate of the existing shell-shaped orthodontic appliance is kept unchanged, however, the length of the jaw plate 301 ' is unchanged compared with the jaw plate 301 of the existing shell-shaped orthodontic appliance because the teeth 303 are far moved, at this time, the jaw plate 301 ' can only be supported by the teeth 305-309 (generally, the width of the jaw plate is smaller than the size of the teeth along the labial direction, so the side wall along the near-far direction can be supported by the occlusal surface of the teeth), and in addition, the edge close to one end of the teeth 303 is not originally manufactured because the teeth 303 are far moved to fall in the hollow, so that the overall strength of the jaw plate 201 ' is reduced.

Referring to fig. 3C, the position relationship between the jaw plate 301 "and the teeth 303-309 is schematically illustrated when the shell-shaped orthodontic appliance is worn after the teeth 303 are moved distally. The length of the jaw plate of the shell-shaped orthodontic appliance is adjusted along with the far movement of the corresponding teeth, the teeth 303 are far moved, the length of the jaw plate 301 'is longer than that of the jaw plate 301 so as to obtain the support of the teeth 303-309, and the edge of one end of the jaw plate, close to the teeth 303, falls on the teeth 303 so as to obtain the support, so that the overall strength of the jaw plate 301' is ensured.

It will be appreciated in the light of this application that, in addition to the increased spacing between the teeth on which the jaw plate is disposed, it is sometimes desirable to reduce the spacing between the teeth on which the jaw plate is disposed, and then the length of the jaw plate can be correspondingly reduced to ensure that the jaw plate is adequately supported by these teeth.

Referring to fig. 4, a jaw pad 400 according to an embodiment of the present application is schematically illustrated, the view is a maxillofacial view, a first end 401 of the jaw pad 400 is an end matched with the maxillofacial pad, a second end 403 of the jaw pad is a tail end, and the width of the jaw pad 400 is gradually narrowed from the first end 401 to the second end 403 to increase the strength of the jaw pad to bear the pressure from the maxillofacial plate.

The method for manufacturing the shell-shaped orthodontic appliance in one embodiment of the present application will be briefly described below by taking, as an example, the shell-shaped orthodontic appliance required for orthodontic treatment of teeth requiring front and lower jaws in only one of the stages.

First, a three-dimensional digital model of the segmented upper and lower jaw teeth (each tooth can be moved individually) is obtained.

Then, a series of successive three-dimensional digital models of the upper teeth are obtained by tooth arrangement, and the series of successive three-dimensional digital models of the upper teeth correspond to the series of successive layouts of the upper teeth and the series of successive three-dimensional digital models of the lower teeth correspond to the series of successive layouts of the lower teeth. Tooth alignment is the process of determining an orthodontic treatment plan, and in one embodiment, interpolation may be performed based on a digital data set representing an original layout and a target layout of teeth to obtain a series of successive three-dimensional digital models of teeth, one-to-one corresponding to the series of successive tooth layouts.

Then, a series of successive three-dimensional digital models of upper teeth and a series of successive three-dimensional digital models of lower teeth corresponding to the correction stage of the lower jaw needing to be guided are screened out. And positioning the three-dimensional digital models of the paired upper and lower jaw teeth to lead the lower jaw to the target position, wherein the distance between the upper and lower jaws is consistent with the target padding height. And then, adding the three-dimensional digital model of the jaw plate at the position selected by the occlusal surface of the three-dimensional digital models of the upper and lower jaw teeth.

When the jaw plate is added, the local height of the jaw plate is ensured to be changed along with the length change of the opposite jaw teeth in the correcting process, so that the height of the upper and lower jaws of the jaw plate is consistent with the target, and the jaw plate is uniformly contacted with the opposite jaw teeth (under the condition that a plurality of opposite jaw teeth exist). This prevents the jaw plate from obstructing the elongation of the opposing tooth if the tooth elongates during the correction process.

When the jaw plate is added, on the other hand, the proper position of the jaw plate is ensured, so that under the condition that the pose of teeth provided with the jaw plate changes along with correction, the guide inclined planes of the upper jaw pad and the lower jaw pad are fully contacted in occlusion, stress concentration caused by point or line contact is avoided, and meanwhile, the lower jaw is guided to the target position. In one embodiment, the relative position of the three-dimensional digital model of the jaw plate to the entire dental jaw can be fixed, thus ensuring that the relative position of the upper and lower jaws remains unchanged in the occluded state. In yet another embodiment, if the arch morphology changes significantly, the relative position of the jaws and the dental jaws can be adjusted appropriately if the relative position of the jaws and the entirety of the dental jaws is fixed such that the positional relationship between the jaws and the teeth on which the jaws are disposed on some shell-like orthodontic appliances is not appropriate (e.g., the jaws are out of range of the teeth on which the jaws are disposed in the buccal-lingual direction).

When the jaw plate is added, the length of the jaw plate is proper on the other hand, so that the jaw plate is fully supported by corresponding teeth, and the integral strength of the jaw plate is further ensured.

Then, a male mold of the tooth is made by a tooth three-dimensional digital model control device (such as a light curing device) with a jaw plate, and finally, a film is pressed on the male mold of the tooth by a hot pressing film forming process to obtain the shell-shaped orthodontic appliance with the jaw plate.

It is understood that, in addition to the hot-pressing film forming process, the shell-shaped orthodontic appliance of the present application may be manufactured by other methods, for example, the shell-shaped orthodontic appliance may be manufactured by directly printing by a 3D printing method.

It will be appreciated in light of the present application that the shell body and jaw plate of the shell orthodontic appliance of the present application can also be manufactured separately and then bonded or welded to the shell body in the appropriate location.

It will be appreciated in the light of the present application that while the most common use of the jaw plates is to lead the lower jaw, the reverse arrangement can also be used to pull the upper jaw forward to promote sagittal and transverse development of the upper jaw and to inhibit excessive lower jaw development, and thus the shell orthodontic appliance of the present application is equally applicable in these situations.

While various aspects and embodiments of the disclosure are disclosed herein, other aspects and embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification. The various aspects and embodiments disclosed herein are for purposes of illustration only and are not intended to be limiting. The scope and spirit of the application are to be determined only by the claims appended hereto.

Likewise, the various diagrams may illustrate an exemplary architecture or other configuration of the disclosed methods and systems that is useful for understanding the features and functionality that may be included in the disclosed methods and systems. The claimed subject matter is not limited to the exemplary architectures or configurations shown, but rather, the desired features can be implemented using a variety of alternative architectures and configurations. In addition, to the extent that flow diagrams, functional descriptions, and method claims do not follow, the order in which the blocks are presented should not be limited to the various embodiments which perform the recited functions in the same order, unless the context clearly dictates otherwise.

Unless otherwise expressly stated, the terms and phrases used herein, and variations thereof, are to be construed as open-ended as opposed to limiting. In some instances, the presence of an extensible term or phrases such as "one or more," "at least," "but not limited to," or other similar terms should not be construed as intended or required to imply a narrowing in instances where such extensible terms may not be present.

Claims

1. A shell-like orthodontic appliance, comprising: n shell form orthodontic appliances one by one correspond N and correct the step one by one respectively, each of N shell form orthodontic appliances is used for repositioning the tooth to should correspond the target overall arrangement who corrects the step from the initial overall arrangement that corrects the step correspondingly, each of N shell form orthodontic appliances is equipped with the jaw board in back tooth district, with the jaw board cooperation to the jaw, upper and lower jaw along the relative position of fore-and-aft when adjusting the occlusion, wherein, the local height of the jaw board of N shell form orthodontic appliances reduces along with the extension of relative jaw tooth in the correction process with it, in order to avoid hindering the extension to the jaw tooth, wherein, N is for being greater than 3 natural number.

2. The shell-shaped orthodontic appliance of claim 1 wherein the N shell-shaped orthodontic appliances have jaw plates that increase in local height as opposing jaw teeth are depressed during the appliance.

3. The shell-shaped orthodontic appliance of claim 2, wherein the N shell-shaped orthodontic appliances have jaw plates that vary in local height as a function of the length of the opposing pair of jaw teeth during the appliance such that, upon occlusion, the jaw plates are in substantially uniform contact with the pair of jaw teeth while maintaining the height of the padding between the upper and lower jaws substantially constant.

4. The shell-shaped orthodontic appliance of claim 3, wherein the relative positions of the jaw plates of the N successive shell-shaped orthodontic appliances and the teeth on which the jaw plates are provided vary with the position of the teeth during the appliance, so that when the teeth are occluded, the relative positional relationship of the upper and lower jaws substantially coincides with the target, and the inclined guide surfaces of the jaw plates are in sufficient contact with the inclined guide surfaces of the jaw plates.

5. The shell-shaped orthodontic appliance of claim 4 wherein the length of the jaws of the N successive shell-shaped orthodontic appliances varies as the spacing between the teeth on which the jaws are disposed varies such that the jaws of the N successive shell-shaped orthodontic appliances are fully supported by the teeth.

6. The shell-shaped orthodontic appliance of claim 5 wherein the width of the jaws of the N shell-shaped orthodontic appliances gradually narrows from the lead slope to the other end.

7. A shell-shaped orthodontic appliance according to any one of claims 1 to 6, wherein each of the N shell-shaped orthodontic appliances is provided with jaws at both lateral posterior zones.

8. The shell-shaped orthodontic appliance of claim 7, wherein the N shell-shaped orthodontic appliances are maxillary appliances for cooperating with the jaws of the opposing jaw to lead the lower jaw.

9. The shell-shaped orthodontic appliance of claim 8 wherein each of the N shell-shaped orthodontic appliances is a unitary shell.

10. The shell-shaped orthodontic appliance of claim 9 wherein, of the N successive correction steps, the initial layout of the mth correction step is the same as the target layout of the M-1 correction step, and the target layout of the mth correction step is the same as the initial layout of the M +1 correction step, where M is less than N.