CN114681077A - Bistable invisible correcting method and correcting device based on shape memory material - Google Patents
Bistable invisible correcting method and correcting device based on shape memory material Download PDFInfo
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- CN114681077A CN114681077A CN202210208365.8A CN202210208365A CN114681077A CN 114681077 A CN114681077 A CN 114681077A CN 202210208365 A CN202210208365 A CN 202210208365A CN 114681077 A CN114681077 A CN 114681077A
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- appliance
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- orthodontic
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- 239000012781 shape memory material Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002861 polymer material Substances 0.000 claims abstract description 12
- 229920000431 shape-memory polymer Polymers 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 210000004513 dentition Anatomy 0.000 claims description 18
- 230000036346 tooth eruption Effects 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 16
- 230000009477 glass transition Effects 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000002591 computed tomography Methods 0.000 claims description 4
- 210000004746 tooth root Anatomy 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 5
- 210000000214 mouth Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 210000004283 incisor Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 206010061274 Malocclusion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011960 computer-aided design Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/002—Orthodontic computer assisted systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
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- A61B6/512—
Abstract
The invention discloses a bistable invisible correcting method based on a shape memory material and a corrector, and relates to the technical field of the corrector. The specific implementation of the invention comprises the following steps: s1, obtaining the oral data of the patient; s2, designing an orthodontic treatment scheme; s3, designing an invisible appliance; s4, shaping the invisible appliance; and S5, wearing the invisible appliance. The material consumption of the invisible orthodontic appliance is greatly reduced, the shape memory polymer material is applied to the invisible orthodontic appliance, and the number of the used appliances is half of that of the traditional invisible appliances; the material cost of the shape memory polymer material is low, and the shape memory polymer material is easy to process and form; shape memory macromolecular material has biocompatibility, and it has good mechanical properties to be applied to the stealthy ware of correcting in orthodontic, compares in traditional stealthy ware of correcting in orthodontic of shape memory macromolecular material, and the ware is corrected more accurately in the stealthy ware of correcting in orthodontic.
Description
Technical Field
The invention relates to the technical field of correction appliances, in particular to a bistable invisible correction method based on a shape memory material and a correction appliance.
Background
With the gradual maturity of 3D printing and computer aided design technologies, the bracket-free invisible correction technology comes up. Most of the traditional invisible orthodontic appliances are made of elastic deformation to generate orthodontic force which is continuously applied to the teeth to be moved, so that the aim of orthodontic treatment is fulfilled. However, due to the fatigue of the elastic material, the force applied to the teeth by the appliance gradually attenuates after the appliance is worn for a period of time, so that the invisible appliance has a plurality of obstacles to the correction of complex malocclusion. Therefore, in the process of correction, a doctor needs to restart the correction scheme of the teeth for many times, so that a large number of correction devices are manufactured, which wastes materials and causes higher treatment cost.
Shape memory macromolecular material has had the application in stealthy correction, mainly is used in on the arch wire of fixed ware of correcting, discovers through three-point bending experiment, simple beam and cantilever beam experiment, and the arch wire that shape memory macromolecular material made, its elastic restoring force can slow release, has mechanical stability. Therefore, the shape memory polymer material has the prospect of being applied to orthodontic correction.
The invention provides an invisible appliance based on a thermotropic shape memory polymer material and a manufacturing and using method thereof. The shape memory polymer material has three memory cycle processes: remembering the initial state, fixing the deformation state and recovering the initial state. The forming temperature of the memory initial state and the forming temperature of the fixed deformation form of the thermotropic shape memory material used by the invention are both greatly higher than the temperature of the oral cavity, after the fixed deformation form is worn on the teeth for a period of time, the invisible appliance is raised to the glass transition temperature by the temperature outside the oral cavity, the appliance is recovered to the memory initial state and is worn on the teeth again. In the process, because the invisible orthodontic devices made of the shape memory materials can be formed secondarily, the orthodontic effect which can be achieved by the two original traditional invisible orthodontic devices can be achieved only by using one invisible orthodontic device made of the shape memory materials, the number of the orthodontic devices can be reduced by half, and the treatment cost is greatly reduced. Meanwhile, the invisible orthodontic appliance made of the shape memory material has more continuous and stable orthodontic force than the traditional invisible orthodontic appliance, the treatment period can be shortened, and a better orthodontic effect is achieved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a bistable invisible orthodontic method and an orthodontic device based on a shape memory material, which solve the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the bistable invisible correcting method and the correcting device based on the shape memory material comprise the following steps:
s1, acquiring oral data of the patient: directly scanning and acquiring dental crown data of a patient by using an intraoral scanner, and carrying out CT scanning on the patient to obtain jaw bone and dental root data of the patient;
s2, designing an orthodontic treatment scheme;
s3, designing an invisible appliance;
s4, shaping the invisible appliance;
and S5, wearing the invisible appliance.
Optionally, the step S2 specifically includes the following steps:
s21, determining the restoring force provided by the appliance according to the constitutive model of the shape memory high polymer;
and S22, determining the treatment period of the single pair of orthodontic appliances according to the tooth movement amount and the restoring force of the appliances, and obtaining the dentition model of each stage of orthodontic treatment.
Optionally, the step S3 specifically includes the following steps:
s31, on the staged dentition model, obtaining the labial side of the appliance through curved surface deviation, and then obtaining a base model of the appliance through thickening;
s32, designing the thickness of the personalized local appliance or the design of the accessory and the pasting position thereof according to the constitutive model of the shape memory material,
and S33, combining the final local structure with the aggregate matrix model to obtain the shape of the final invisible appliance.
Optionally, the step S4 specifically includes the following steps:
s41, designing an injection mold according to the designed invisible appliance by using the dentition model at the third stage, sintering the mold by using a laser powder sintering forming machine SLS, and processing the initial shape of the appliance in an injection molding mode;
and S42, performing secondary molding on the injection-molded invisible appliance, increasing the temperature to be higher than the glass transition temperature by using a film pressing method, performing compression molding, performing hot film pressing on the injection-molded appliance on dentition at the second stage, reducing the temperature under the condition of keeping external load, and processing the secondary-molded invisible appliance.
Optionally, the step S5 specifically includes the following steps:
s51, when the patient uses the appliance, the post-forming invisible appliance is directly worn on the dentition in the first stage;
s52, after the teeth move, putting the appliance into water with the temperature higher than the glass transition temperature of the shape memory polymer material, and returning the invisible appliance to the initial memory state;
and S53, wearing the tooth correction device on the patient' S tooth again to push the tooth to move to an ideal pose, thereby achieving the purpose of correction.
An appliance, such as the invisible appliance described above.
The invention provides a bistable invisible correcting method and a correcting device based on a shape memory material, which have the following beneficial effects:
based on the deformation characteristics of the thermotropic shape memory polymer material, the material is deformed by external load in a certain temperature environment (glass transition temperature), and is cooled under the condition of ensuring external constraint, so that a new shape after solidification, namely a fixed deformation shape, is obtained; when the temperature rises above the glass transition temperature again, the shape returns to its initial state of memory.
In the invention, the shape of the secondary-formed invisible appliance is designed as an intermediate form between the initial form and the final form of the tooth, the secondary-formed invisible appliance is directly worn on the initial tooth column, after the first movement of the tooth is completed, the invisible appliance is taken out, stimulation is applied to the periphery (the temperature is raised to be higher than the glass transition temperature), the shape of the secondary-formed invisible appliance is changed into the initial memory state, and the secondary deformation is completed after the secondary-formed invisible appliance is worn on the tooth again.
The material consumption of the invisible orthodontic appliance is greatly reduced, the shape memory polymer material is applied to the invisible orthodontic appliance, and the number of the used appliances is half of that of the traditional invisible appliances; the shape memory polymer material has low material cost, is easy to process and form, and can greatly reduce the treatment cost when being applied to the orthodontic treatment; shape memory macromolecular material has biocompatibility, is applied to just abnormal stealthy appearance of correcting of oral cavity and has good mechanical properties, compares in traditional stealthy appearance of correcting, and shape memory macromolecular material just abnormal stealthy appearance of correcting of oral cavity is corrected more accurately.
Drawings
FIG. 1 is a schematic view of a first stage dentition structure according to the present invention;
FIG. 2 is a schematic view of the structure of the dentition (0.5 mm of outward displacement of the left incisors on the lower jaw) in the second stage of the present invention;
fig. 3 is a schematic view of the third stage of the present invention showing the structure of the dentition (left incisors on the lower jaw moved outward by 1 mm).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
The invention provides a technical scheme that: the bistable invisible correcting method and the correcting device based on the shape memory material comprise the following steps:
as shown in fig. 1, S1, acquiring patient oral data: directly scanning and acquiring dental crown data of a patient by using an intraoral scanner, and carrying out CT scanning on the patient to obtain jaw bone and dental root data of the patient;
s2, designing an orthodontic treatment scheme;
s3, designing an invisible appliance;
s4, shaping the invisible appliance;
s5, wearing the invisible orthodontic device.
Detailed description of the preferred embodiment 2
The bistable invisible correcting method and the correcting device based on the shape memory material comprise the following steps:
as shown in FIG. 1, S1, the oral data of the patient is obtained
The dental crown data of the patient is directly obtained by scanning with an intraoral scanner, and the patient is subjected to CT scanning to obtain jaw bone and dental root data of the patient.
S2 orthodontic treatment scheme design
S21, carrying out scheme design on orthodontic treatment tooth arrangement, carrying out motion constraint, collision constraint and tooth spacing constraint on the orthodontic treatment tooth arrangement, wherein the tooth arrangement result specifically comprises the position and number of tooth extractions, tooth movement or rotation, anchorage design, accessory design and the like, and the restoring force provided by the appliance is determined according to a constitutive model of the shape memory high polymer;
and S22, determining the treatment period of the single appliance according to the tooth movement amount and the restoring force of the appliance, and obtaining the dentition model of each stage of orthodontic treatment.
S3 design of invisible appliance
S31, on the staged dentition model, obtaining the labial side of the appliance through curved surface deviation, and then obtaining a base model of the appliance through thickening;
s32, designing the thickness of the personalized local appliance or the design of the accessory and the pasting position thereof according to the constitutive model of the shape memory material,
and S33, combining the final local structure with the aggregate matrix model to obtain the form of the final invisible orthodontic appliance.
As shown in FIG. 2 and FIG. 3, S4, shaping of invisible appliance
S41, designing an injection mold according to the designed invisible orthodontic appliance by using the dentition model in the third stage, sintering the mold by using a laser powder sintering forming machine (SLS), and processing the initial shape of the orthodontic appliance in an injection molding mode;
and S42, performing secondary molding on the injection-molded invisible appliance, increasing the temperature to be higher than the glass transition temperature by using a film pressing method, performing compression molding, performing hot film pressing on the injection-molded appliance on dentition at the second stage, reducing the temperature under the condition of keeping external load, and processing the secondary-molded invisible appliance.
Optionally, the step S5 specifically includes the following steps:
s51, when the patient uses the appliance, the post-forming invisible appliance is directly worn on the dentition in the first stage;
s52, after the teeth move, putting the appliance into water with the temperature higher than the glass transition temperature of the shape memory polymer material, and returning the invisible appliance to the initial state of memory;
and S53, wearing the tooth correction device on the patient' S tooth again to push the tooth to move to an ideal pose, thereby achieving the purpose of correction.
An appliance, such as the invisible appliance described above.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (6)
1. The bistable invisible correcting method based on the shape memory material comprises the following steps:
s1, acquiring oral data of the patient: directly scanning and acquiring dental crown data of a patient by using an intraoral scanner, and carrying out CT scanning on the patient to obtain jaw bone and dental root data of the patient;
s2, designing an orthodontic treatment scheme;
s3, designing an invisible appliance;
s4, shaping the invisible appliance;
and S5, wearing the invisible appliance.
2. The bistable invisible orthodontic method based on the shape memory material as claimed in claim 1, wherein the step S2 specifically comprises the following steps:
s21, determining the restoring force provided by the appliance according to the constitutive model of the shape memory high polymer;
and S22, determining the treatment period of the single pair of orthodontic appliances according to the tooth movement amount and the restoring force of the appliances, and obtaining the dentition model of each stage of orthodontic treatment.
3. The bistable invisible orthodontic method based on the shape memory material as claimed in claim 1, wherein the step S3 specifically comprises the following steps:
s31, on the staged dentition model, obtaining the labial side of the appliance through curved surface deviation, and then obtaining a base model of the appliance through thickening;
s32, designing the thickness of the personalized local appliance or the design of the accessory and the pasting position thereof according to the constitutive model of the shape memory material,
and S33, combining the final local structure with the aggregate matrix model to obtain the shape of the final invisible appliance.
4. The bistable invisible orthodontic method based on the shape memory material as claimed in claim 1, wherein the step S4 specifically comprises the following steps:
s41, designing an injection mold according to the designed invisible appliance by using the dentition model at the third stage, sintering the mold by using a laser powder sintering forming machine SLS, and processing the initial shape of the appliance in an injection molding mode;
and S42, performing secondary molding on the injection-molded invisible appliance, increasing the temperature to be higher than the glass transition temperature by using a film pressing method, performing compression molding, performing hot film pressing on the injection-molded appliance on dentition at the second stage, reducing the temperature under the condition of keeping external load, and processing the secondary-molded invisible appliance.
5. The bistable invisible orthodontic method based on the shape memory material as claimed in claim 1, wherein the step S5 specifically comprises the following steps:
s51, when the patient uses the appliance, the post-forming invisible appliance is directly worn on the dentition in the first stage;
s52, after the teeth move, putting the appliance into water with the temperature higher than the glass transition temperature of the shape memory polymer material, and returning the invisible appliance to the initial state of memory;
and S53, wearing the tooth correction device on the patient' S tooth again to push the tooth to move to an ideal pose, thereby achieving the purpose of correction.
6. An appliance, the invisible appliance of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210208365.8A CN114681077A (en) | 2022-03-04 | 2022-03-04 | Bistable invisible correcting method and correcting device based on shape memory material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210208365.8A CN114681077A (en) | 2022-03-04 | 2022-03-04 | Bistable invisible correcting method and correcting device based on shape memory material |
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| CN114681077A true CN114681077A (en) | 2022-07-01 |
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| CN202210208365.8A Pending CN114681077A (en) | 2022-03-04 | 2022-03-04 | Bistable invisible correcting method and correcting device based on shape memory material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050003318A1 (en) * | 2001-07-02 | 2005-01-06 | Young-Kyu Choi | Orthodontic appliance by using a shape memory polymer |
| CN104161596A (en) * | 2014-08-04 | 2014-11-26 | 浙江工业大学 | Shape memory material-based oral appliance production method and invisible appliance thereby |
| CN106725926A (en) * | 2016-12-20 | 2017-05-31 | 有研医疗器械（北京）有限公司 | A kind of memorial alloy invisible orthotic device without bracket and preparation method thereof |
| CN108348306A (en) * | 2015-11-02 | 2018-07-31 | 3M创新有限公司 | Orthodontic appliance with continuous shape memory |
| CN110507432A (en) * | 2019-08-27 | 2019-11-29 | 深圳牙领科技有限公司 | One kind is rescued with selfreparing hot pressing diaphragm |
| US20210369422A1 (en) * | 2017-10-06 | 2021-12-02 | Airway Technologies, Llc | Methods for Manufacturing an Oral Appliance |
-
2022
- 2022-03-04 CN CN202210208365.8A patent/CN114681077A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050003318A1 (en) * | 2001-07-02 | 2005-01-06 | Young-Kyu Choi | Orthodontic appliance by using a shape memory polymer |
| CN104161596A (en) * | 2014-08-04 | 2014-11-26 | 浙江工业大学 | Shape memory material-based oral appliance production method and invisible appliance thereby |
| CN108348306A (en) * | 2015-11-02 | 2018-07-31 | 3M创新有限公司 | Orthodontic appliance with continuous shape memory |
| CN106725926A (en) * | 2016-12-20 | 2017-05-31 | 有研医疗器械（北京）有限公司 | A kind of memorial alloy invisible orthotic device without bracket and preparation method thereof |
| US20210369422A1 (en) * | 2017-10-06 | 2021-12-02 | Airway Technologies, Llc | Methods for Manufacturing an Oral Appliance |
| CN110507432A (en) * | 2019-08-27 | 2019-11-29 | 深圳牙领科技有限公司 | One kind is rescued with selfreparing hot pressing diaphragm |
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