CN109771063A - A kind of dental appliance and preparation method thereof - Google Patents
A kind of dental appliance and preparation method thereof Download PDFInfo
- Publication number
- CN109771063A CN109771063A CN201910092158.9A CN201910092158A CN109771063A CN 109771063 A CN109771063 A CN 109771063A CN 201910092158 A CN201910092158 A CN 201910092158A CN 109771063 A CN109771063 A CN 109771063A
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- China
- Prior art keywords
- transparent sheath
- dental appliance
- supporting element
- transparent
- tooth
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 210000000214 mouth Anatomy 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000010146 3D printing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000016 photochemical curing Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000003934 vacuole Anatomy 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 210000004357 third molar Anatomy 0.000 description 1
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The present invention relates to oral cavities to rescue equipment technical field, more particularly, to a kind of dental appliance and preparation method thereof.Including facing, be provided in the cheek side of the facing or tongue side towards gum to supporting element, the supporting element be equipped with draw hook.The anchorage of effectively auxiliary facing moving teeth, moving teeth comes from entire denture and bite force, is less prone to and press-offs, and can effectively prevent tooth inclination.
Description
Technical field
The present invention relates to oral cavities to rescue equipment technical field, more particularly, to a kind of dental appliance and its preparation side
Method.
Background technique
The advantages that it is one of invisalign technology that transparent facing, which rescues technology, beautiful because of stealth, comfortable, clinically
Certain application is arrived.But use it is transparent rescue carry out extraction cases treatment when, often there is the anchorage loss ground one's teeth in sleep, occur
It grinds one's teeth in sleep mesial inclination, the Mesial movement ground one's teeth in sleep is difficult.When first or second molar deletion, often there is the mesial inclination ground one's teeth in sleep.
The patient of part molar deletion not only needs the vertical first or second to grind one's teeth in sleep, it is also necessary to which inclined third molar is vertical in nearly
And to Mesial movement, treat that this kind of patient's difficulty for needing erect molar and moving forward is big, and treatment time is long, greatly with transparent rescue
The transparent application range for rescuing technology of big constriction.When need labial teeth to it is mobile in remote when, it is slower also often to will appear preceding Tooth movement,
Or there is the possibility that facing is not bonded with tooth.How to assist dental appliance moving teeth and prevents tooth inclination always
It is the transparent problem for rescuing technology.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of dental appliance and its preparation
Method effectively assists facing moving teeth, and the anchorage of moving teeth comes from entire denture and bite force, is less prone to and press-offs, energy
Effectively prevent tooth inclination.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of dental appliance, including facing, institute
Be provided in the cheek side for the facing stated or tongue side towards gum to supporting element, the supporting element be equipped with draw hook.
When progress oral cavity is rescued, needs to pull out the premolar teeth of patient, can be left after premolar extraction
Extraction of tooth space and may exist grind one's teeth in sleep mesial inclination the case where, cause to grind one's teeth in sleep when rescuing using invisible orthotic device with
Facing disengages, generally can be in upper installation traction button of grinding one's teeth in sleep, in the present apparatus, using on supporting element when oral cavity is rescued
Draw hook hook the traction button on grinding one's teeth in sleep, and supporting element is goed deep into the cheek side of extraction of tooth space, supporting element can either rise at this time
To supporting role of the facing at extraction, it can also be drawn to grinding one's teeth in sleep, can either play and the position ground one's teeth in sleep is drawn
It is fixed, inclination of grinding one's teeth in sleep is avoided, can also prevent from grinding one's teeth in sleep and facing disengaging, can be effectively prevented that tooth is inclined to be happened.
In addition, in the present apparatus, can need add in the position of supporting element according to actual traction, it, can be if tongue side needs to draw
Tongue side adds a supporting element.
Further, the supporting element includes vertical part and the horizontal part interconnected, and several draw hooks are set
It is placed on vertical portion.Wherein, draw hook is U-shaped hook, and the top of vertical portion is arranged in horizontal part, and horizontal part plays increase facing and exists
The intensity in extraction region, avoids facing from occurring being recessed and shift in extraction of tooth space.
Further, the horizontal part is stretched to the mesial surface, distal surface and tongue side of tooth.Wherein, horizontal part across
Two adjacent teeth of extraction of tooth space, play the role of supporting facing.
Further, the facing includes the first transparent sheath and the second transparent sheath, first transparent sheath and second
Transparent sheath is bonded to each other, and the supporting element is connected between the first transparent sheath and the second transparent sheath.By the first transparent sheath and
The combination of second transparent sheath supporting element can be fixed well, avoid supporting element when in use and facing is de-
From ensure that supporting element can play supporting role well and to the draw ground one's teeth in sleep.
Further, the contact surface of first transparent sheath and the second transparent sheath is sandblasting coarse surface, described the
One transparent sheath is be bonded by resinoid bond photocuring with the second transparent sheath.
Further, first transparent sheath with a thickness of 0.2mm ~ 0.5mm, the second transparent sheath with a thickness of 0.5mm ~
1mm。
Further, the facing is equipped with hollow out, and the hollow out is apart from vertical portion 1mm ~ 1.5mm.
Further, the supporting element is made of transparent resin material.It will not influence beauty in this way.
Further, a kind of manufacturing method of dental appliance, comprising the following steps:
S101: the oral cavity model of patient is scanned, and model information is directed into row's tooth software；
S102: virtually arranging tooth using row's tooth software, and presets at extraction of tooth space during virtually row's tooth
The position of supporting element forms dental appliance model in computer；
S103: by dental appliance model described in step S102 by 3D printing at the first transparent sheath and the second transparent sheath, into
Row press mold；
S104: first suppressing the first transparent sheath, is coated with resinoid bond and places supporting element, re-compacted second transparent sheath is most laggard
Row light-cured resin bonding is compressed on supporting element between the first transparent sheath and the second transparent sheath (21), the first transparent sheath and second
Transparent sheath bonding.
Further, the contact surface of first transparent sheath and the second transparent sheath carries out sandblasting roughening treatment, coating tree
Re-compacted second transparent sheath, finally carries out illumination curing after rouge binder.The first transparent sheath and second can be increased well thoroughly
Binding force between bright set.
Compared with prior art, beneficial effect is: effectively auxiliary facing moving teeth, the anchorage of moving teeth is from entire
Denture and bite force, are less prone to and press-off, and can effectively prevent tooth inclination.
Detailed description of the invention
Fig. 1 is overall structure diagrammatic cross-section of the present invention.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing
Illustrate, should not be understood as the limitation to this patent.
As shown in Figure 1, a kind of dental appliance, including facing 2 and supporting element 1, wherein facing 2 is arranged in supporting element 1
In cheek side or tongue side, and supporting element 1 is arranged towards the face of conjunction.Supporting element 1 includes vertical portion 12 and horizontal part 11, and horizontal part 11 is arranged
In the end of vertical portion 12, several U-shaped draw hooks 13 are arranged on vertical portion 12.In the present embodiment, horizontal part 11 is to tooth
Mesial surface, distal surface and the tongue side stretching, extension of tooth.Wherein, two teeth adjacent across extraction of tooth space of horizontal part 11, play and support
The effect of facing 2.
In the present embodiment, facing 2 includes the first transparent sheath 22 and the second transparent sheath 21, and the first transparent sheath 22 and second is saturating
Bright set 21 is bonded to each other, wherein and supporting element 1 is connected between the first transparent sheath 22 and the second transparent sheath 21, specifically, supporting element
1 is fixed on cheek side or tongue side to fix with the cheek side of extraction of tooth space or tongue side.Pass through the first transparent sheath 22 and the second transparent sheath
21 combination supporting element 1 can be fixed well, avoid supporting element 1 when in use and facing 2 is detached from, protect
Supporting role well can be played and to the draw ground one's teeth in sleep by having demonstrate,proved supporting element 1.First transparent sheath 22 and the second transparent sheath
21 contact surface is sandblasting coarse surface, and first transparent sheath 22 and the second transparent sheath 21 pass through resinoid bond photocuring
Bonding.
Wherein, first transparent sheath 22 with a thickness of 0.2mm ~ 0.5mm, the second transparent sheath 21 with a thickness of 0.5mm ~
1mm.Hollow out is equipped on facing 2, the hollow out is apart from vertical portion 121mm ~ 1.5mm.
For whole aesthetics, supporting element 1 is made of transparent resin material, and whole clearing is beautiful, and patient is wearing this
It there will not be apparent wearing trace after device.
When progress oral cavity is rescued, needs to pull out the premolar teeth of patient, can be left after premolar extraction
Extraction of tooth space and may exist grind one's teeth in sleep mesial inclination the case where, cause to grind one's teeth in sleep when rescuing using invisible orthotic device with
Facing disengages, and generally in the present apparatus, can utilize supporting element 1 in upper installation traction button 3 of grinding one's teeth in sleep when oral cavity is rescued
On draw hook 13 hook the traction button 3 on grinding one's teeth in sleep, and by supporting element 1 deeply to the cheek side of extraction of tooth space, supporting element 1 had been both at this time
Supporting role of the facing 2 at extraction can be played, can also be drawn to grinding one's teeth in sleep, can either play to the position ground one's teeth in sleep into
Row traction is fixed, and inclination of grinding one's teeth in sleep is avoided, and can also prevent from grinding one's teeth in sleep is detached from facing 2, can be effectively prevented the inclined feelings of tooth
Condition occurs, in addition, passing through the draw of draw hook 13, tooth can also be assisted mobile.In addition, in the present apparatus, Ke Yigen
It needs to add the position in supporting element 1 according to actual traction, if tongue side needs to draw, a supporting element 1 can be added in tongue side.This
Device due to having Double-layered transparent film and occlusion strength, stablize by the position of draw hook 13, is greatly saved required for tooth movement
Anchorage allows tooth to be easier to move.
Auxiliary tooth is mobile when the present apparatus can be applied to invisalign uses, during tooth is arranged in simulation at extraction of tooth space
Reserve the position of supporting element 1 and the part buccal aspect of hollow out artificial tooth vacuole.Direct pressing reserves the first of 1 hole location of supporting element
Transparent sheath 22 places press mold again after supporting element 1.According to the mobile process of tooth, the position of the default attachment of each pair facing
The position that corresponding variation is supporting element 1 occurs also to change accordingly.By draw hook 13 and the traction button 3 or labial teeth ground one's teeth in sleep
Traction button 3 is drawn, and auxiliary tooth is mobile.Due to having Double-layered transparent film and occlusion strength, the position of draw hook 13 is stablized, greatly
The mobile required anchorage of tooth has been saved greatly, and tooth is allowed to be easier to move.
In addition, the present apparatus can also be used for grind one's teeth in sleep during transparent rescue mesial inclination and the vertical pre- place to Tilted molar
Reason.Occur mesial inclination of grinding one's teeth in sleep during rescuing, grinds one's teeth in sleep and disengaged with facing 2.Or patient treats what preceding presence was ground one's teeth in sleep
Mesial inclination, at the edentulous space of dental appliance reserve supporting element 1 position, place supporting element 1, supporting element 1 it is vertical
Portion 12 carries out secondary press mold close to cheek side, forms " sandwich " spline structure for supporting element 1 and is pressed in the first transparent sheath 22 and second
Between transparent sheath 21.The middle-distant direction 1.5mm wide of vertical portion 12 uses hollow processing, i.e. the cheek side of the artificial tooth vacuole of edentulous space
Part hollow out draws the draw hook 13 of supporting element 1 and the traction button 3 of Tilted molar.
In addition, a kind of manufacturing method of dental appliance, comprising the following steps:
S101: the oral cavity model of patient is scanned, and model information is directed into row's tooth software；
S102: virtually arranging tooth using row's tooth software, and presets at extraction of tooth space during virtually row's tooth
The position of supporting element 1 forms dental appliance model in computer；
S103: by dental appliance model described in step S102 by 3D printing at the first transparent sheath 22 and the second transparent sheath
21, carry out press mold；
S104: first suppressing the first transparent sheath 22, is coated with resinoid bond and places supporting element 1, re-compacted second transparent sheath 21, most
Carrying out light-cured resin bonding afterwards is compressed on supporting element 1 between first transparent sheath 22 and the second transparent sheath 21, the first transparent sheath
22 and second transparent sheath 21 be bonded.
The contact surface of first transparent sheath 22 and the second transparent sheath 21 carries out sandblasting roughening treatment.First can be increased well
Binding force between transparent sheath 22 and the second transparent sheath 21.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of dental appliance, including facing (2), which is characterized in that be provided in the cheek side of the facing (2) or tongue side
Towards gum to supporting element (1), the supporting element (1) be equipped with draw hook (13).
2. a kind of dental appliance according to claim 1, which is characterized in that the supporting element (1) includes mutually interconnecting
The vertical portion (12) connect and horizontal part (11), several draw hooks (13) are set on vertical portion (12).
3. a kind of dental appliance according to claim 2, which is characterized in that the horizontal part (11) is to the close of tooth
Middle face, distal surface and tongue side stretching, extension.
4. a kind of dental appliance according to claim 1, which is characterized in that the facing (2) includes first transparent
Set (22) and the second transparent sheath (21), first transparent sheath (22) and the second transparent sheath (21) are bonded to each other, the branch
Support member (1) is connected between the first transparent sheath (22) and the second transparent sheath (21).
5. a kind of dental appliance according to claim 4, which is characterized in that first transparent sheath (22) and second
The contact surface of transparent sheath (21) is sandblasting coarse surface, and first transparent sheath (22) and the second transparent sheath (21) pass through resin
Binder photocuring bonding.
6. a kind of dental appliance according to claim 4, which is characterized in that the thickness of first transparent sheath (22)
For 0.2mm ~ 0.5mm, the second transparent sheath (21) with a thickness of 0.5mm ~ 1mm.
7. a kind of dental appliance according to claim 2, which is characterized in that the facing (2) is equipped with hollow out, institute
The hollow out stated is apart from vertical portion (12) 1mm ~ 1.5mm.
8. a kind of dental appliance according to claim 1, which is characterized in that the supporting element (1) is by transparent resin
Material is made.
9. a kind of manufacturing method of dental appliance, which comprises the following steps:
S101: the oral cavity model of patient is scanned, and model information is directed into row's tooth software；
S102: virtually arranging tooth using row's tooth software, and presets at extraction of tooth space during virtually row's tooth
The position of supporting element (1) forms dental appliance model in computer；
S103: by dental appliance model described in step S102 by 3D printing at the first transparent sheath (22) and the second transparent sheath
(21), press mold is carried out；
S104: first suppressing the first transparent sheath (22), is coated with resinoid bond and places supporting element (1), re-compacted second transparent sheath
(21), finally carry out light-cured resin bonding make supporting element (1) be compressed on the first transparent sheath (22) and the second transparent sheath (21) it
Between, the first transparent sheath (22) and the second transparent sheath (21) bonding.
10. a kind of manufacturing method of dental appliance according to claim 9, which is characterized in that described first is transparent
The contact surface for covering (22) and the second transparent sheath (21) carries out sandblasting roughening treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092158.9A CN109771063B (en) | 2019-01-30 | 2019-01-30 | Tooth appliance and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092158.9A CN109771063B (en) | 2019-01-30 | 2019-01-30 | Tooth appliance and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109771063A true CN109771063A (en) | 2019-05-21 |
| CN109771063B CN109771063B (en) | 2024-06-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910092158.9A Active CN109771063B (en) | 2019-01-30 | 2019-01-30 | Tooth appliance and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109771063B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110251249A (en) * | 2019-06-03 | 2019-09-20 | 杭州一牙数字口腔有限公司 | A kind of invisible orthotic device without bracket and tooth with channel-attached forces down system |
| CN110575271A (en) * | 2019-09-03 | 2019-12-17 | 南京市口腔医院 | preparation method and use method of digital appliance |
| CN112022385A (en) * | 2020-08-21 | 2020-12-04 | 南京医科大学附属口腔医院 | Layered pressure-applying orthodontic device |
| CN113440272A (en) * | 2020-03-25 | 2021-09-28 | 朱军利 | Tooth traction appliance |
| WO2022095394A1 (en) * | 2020-11-09 | 2022-05-12 | 国际医学及牙科研究协会有限公司 | Orthodontic brace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020192617A1 (en) * | 2000-04-25 | 2002-12-19 | Align Technology, Inc. | Embedded features and methods of a dental appliance |
| KR20150126115A (en) * | 2014-05-02 | 2015-11-11 | 김창환 | Removable orthodontic molar uprighting device |
| CN106388954A (en) * | 2016-10-13 | 2017-02-15 | 东莞定远陶齿制品有限公司 | Manufacturing technology of digitized orthodontic guide plate |
| CN107847293A (en) * | 2014-03-13 | 2018-03-27 | 马茨公司 | Tooth positioning appliances for closing gap |
| CN210843529U (en) * | 2019-01-30 | 2020-06-26 | 广州医科大学附属口腔医院（广州医科大学羊城医院） | Tooth appliance |
-
2019
- 2019-01-30 CN CN201910092158.9A patent/CN109771063B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020192617A1 (en) * | 2000-04-25 | 2002-12-19 | Align Technology, Inc. | Embedded features and methods of a dental appliance |
| CN107847293A (en) * | 2014-03-13 | 2018-03-27 | 马茨公司 | Tooth positioning appliances for closing gap |
| KR20150126115A (en) * | 2014-05-02 | 2015-11-11 | 김창환 | Removable orthodontic molar uprighting device |
| CN106388954A (en) * | 2016-10-13 | 2017-02-15 | 东莞定远陶齿制品有限公司 | Manufacturing technology of digitized orthodontic guide plate |
| CN210843529U (en) * | 2019-01-30 | 2020-06-26 | 广州医科大学附属口腔医院（广州医科大学羊城医院） | Tooth appliance |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110251249A (en) * | 2019-06-03 | 2019-09-20 | 杭州一牙数字口腔有限公司 | A kind of invisible orthotic device without bracket and tooth with channel-attached forces down system |
| CN110575271A (en) * | 2019-09-03 | 2019-12-17 | 南京市口腔医院 | preparation method and use method of digital appliance |
| CN113440272A (en) * | 2020-03-25 | 2021-09-28 | 朱军利 | Tooth traction appliance |
| CN112022385A (en) * | 2020-08-21 | 2020-12-04 | 南京医科大学附属口腔医院 | Layered pressure-applying orthodontic device |
| WO2022095394A1 (en) * | 2020-11-09 | 2022-05-12 | 国际医学及牙科研究协会有限公司 | Orthodontic brace |
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| Publication number | Publication date |
|---|---|
| CN109771063B (en) | 2024-06-21 |
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