CN110226978A - A kind of computer assisted hidden tooth rescues the generation method of model - Google Patents
A kind of computer assisted hidden tooth rescues the generation method of model Download PDFInfo
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention discloses the generation method that a kind of computer assisted hidden tooth rescues model, the monodentate cutting techniques based on model surface average curvature are split single tooth, separate to tooth and gum, effectively increase segmentation precision；For every tooth, it can identify the characteristic point (nearly midpoint, remote midpoint, infradentale) on tooth, and according to anatomic measurement result (corona height, root length) generate long axis of tooth and tooth rotation center, establish tooth moving coordinate system, the actual anatomical features of tooth are accurately reflected, simulation precision is effectively improved；In the establishment process of tooth model, solution of the root of the tooth automatic generation method based on Poisson's equation used, the root of the tooth curved surface that this method generates can meet simultaneously: complexity of coincideing gum line, smooth diseased Root Surfaces and reasonable root form.
Description
Technical field
The present invention relates to computers and field of medical technology, and in particular to a kind of computer assisted hidden tooth rescues model
Generation method.
Background technique
Malocclusion influences the development of dentofacial, influences the health in oral cavity, influences the function in oral cavity, is more likely to seriously affect
The appearance appearance of patient.Furthermore malocclusion causes masticatory function to reduce, and may cause indigestion and gastrointestinal disease, and face
Deformity may also bring psychology and phrenoblabia.And as social development and living standard improve, with modern to (appearance)
The continuous improvement of the pursuit of beauty and health, mouth cavity orthodontic are increasingly taken seriously.
There are mainly three types of orthodontic technologies currently on the market: it is tradition is rescued (using there is bracket appliance) respectively, tongue
Side is rescued (using lingual orthodontics device) and invisalign (using invisible orthotic device without bracket).Invisible orthotic device without bracket is most just
The newest fruits of abnormal technology development, such appliance is with new Computer Image Processing and aided design techniques, rapid shaping
A series of transparent elastic removeable appliance device of technology production, specifically, the tooth model of patient is converted by processing
The identifiable digitalized data of computer.Step is rescued with software Computer Aided Design and finally rescues target.Proprietary technology is used again
A series of appliance facings are customized for every patient, self-changeable is primary every 2 weeks by patient, completes until rescuing.Use is being worn every time
When, tooth can all have the feeling of stress, and mobile to the position of the appliance design, compared with tradition is rescued with lingual orthodontics,
Invisalign has more original advantage and characteristic, and it is good to be embodied in aesthetics, and comfort level is high, and easy cleaning, rescuing result can
Time shortening etc. is rescued in prediction.
Summary of the invention
The technical problem to be solved in the present invention is to provide the generation method that a kind of computer assisted hidden tooth rescues model,
Single tooth can be split by the monodentate cutting techniques based on model surface average curvature, tooth and gum are carried out
Separation, effectively increases segmentation precision；For every tooth, characteristic point (the nearly midpoint, remote midpoint, tooth on tooth can be identified
Slot ridge vertex), and long axis of tooth and tooth rotation center are generated according to anatomic measurement result (corona height, root length), it builds
Vertical tooth moving coordinate system, accurately reflects the actual anatomical features of tooth, effectively improves simulation precision；In building for tooth model
During vertical, solution of the root of the tooth automatic generation method based on Poisson's equation used, the root of the tooth curved surface that this method generates can be with
Meet simultaneously: complexity of coincideing gum line, smooth diseased Root Surfaces and reasonable root form cause to solve the prior art
Defect.
The present invention provides technical solution below to solve above-mentioned technical problem: a kind of computer assisted hidden tooth is rescued
The generation method of model, wherein the following steps are included:
S1: scanning obtains upper dental arch model and mandibular dentition model, and is imported；
S2: the upper dental arch model and the mandibular dentition model are handled respectively；
S3: it is configured according to single tooth, calculates the nearly midpoint plane of generation, remote midpoint plane and long axis of tooth direction；
S4: long axis of tooth direction is adjusted according to clinical demand；
S5: coordinate system is established according to single tooth and long axis of tooth；
S6: calculating upper and lower dental arch model surface curvature, obtains surface curvature distribution model, generates tooth according to surface curvature distribution
The boundary curve of tooth-tooth and tooth-gingiva, and monodentate segmentation is carried out according to boundary curve；
S7: the scarce face on the gingival model generated after monodentate segmentation is filled up, it is bent on boundary condition to control mended face and gum face
Rate is continuous；
S8: tooth (corona) face and measurement gained root length information generated after being divided according to monodentate generates artificial tooth root；
S9: the gingival model after segmentation is assembled with tooth model, generates final invisalign model.
A kind of above-mentioned computer assisted hidden tooth rescues the generation method of model, wherein to the upper dental arch model
Processing, which is carried out, with the mandibular dentition model respectively includes following steps:
The upper dental arch model and the mandibular dentition model are carried out respectively to simplify processing；
Fairing processing is carried out to the upper dental arch model and the mandibular dentition model respectively；
Adjust the position of the upper dental arch model Yu the mandibular dentition model.
A kind of above-mentioned computer assisted hidden tooth rescues the generation method of model, wherein the upper dental arch model with
Reasonable positional relationship is established according to occluding relation between the mandibular dentition model.
A kind of above-mentioned computer assisted hidden tooth rescues the generation method of model, wherein generates nearly midpoint plane, remote
Midpoint plane, the method in long axis of tooth direction the following steps are included:
The nearly midpoint and remote midpoint of single tooth are set, and nearly midpoint, remote midpoint define every tooth near and far direction
General width；
The infradentale of single tooth is set, which defines every tooth in axial corona general height；
It is calculated according to the nearly midpoint of single tooth, remote midpoint and infradentale position and generates plane and long axis of tooth direction in close, remote.
A kind of above-mentioned computer assisted hidden tooth rescues the generation method of model, wherein establishes the specific of coordinate system
Steps are as follows:
Tooth impedance center is calculated according to the projection of infradentale to long axis of tooth and measurement gained root length informix
Position, i.e. tooth moving coordinate system origin；
According to tooth impedance center, tooth is close, it is remote in plane vertical direction, long axis of tooth direction generates single tooth moving coordinate
System.
A kind of above-mentioned computer assisted hidden tooth rescues the generation method of model, wherein by invisalign mould
The simulation that (translation and rotation) single tooth realizes invisalign process is moved in type, gum is in simulation process to calculate generation
Coefficient is reasonably deformed.
The technical solution of the generation method offer of model is provided according to a kind of computer assisted hidden tooth of aforementioned present invention
Effect is: being split by the monodentate cutting techniques based on model surface average curvature to single tooth, to tooth and gum
It is separated, effectively increases segmentation precision；For every tooth, can identify on tooth characteristic point (nearly midpoint, it is remote in
Point, infradentale), and generated in long axis of tooth and tooth rotation according to anatomic measurement result (corona height, root length)
The heart establishes tooth moving coordinate system, accurately reflects the actual anatomical features of tooth, effectively improves simulation precision；In tooth mould
In the establishment process of type, solution of the root of the tooth automatic generation method based on Poisson's equation used, the root of the tooth song that this method generates
Face can meet simultaneously: complexity of coincideing gum line, smooth diseased Root Surfaces and reasonable root form.
Detailed description of the invention
Fig. 1 is the flow chart for the generation method that a kind of computer assisted hidden tooth of the present invention rescues model.
Fig. 2 is the upper and lower dentition model schematic that occluding relation is established after importing；
Fig. 3 close, remote midpoint schematic diagram for single tooth；
Fig. 4 is single tooth infradentale position view；
Fig. 5 be single tooth it is close, it is remote in floor map；
Fig. 6 is single tooth long axis of tooth direction schematic diagram；
Fig. 7 is the gingival model schematic diagram after segmentation；
Fig. 8 is the tooth model schematic diagram after segmentation；
Fig. 9 is that gum mends face result schematic diagram；
Figure 10 is that root of the tooth generates result schematic diagram.
Specific embodiment
In order to realize invention technological means, create feature, reach purpose and effect is easy to understand, lower combination tool
Body diagram, the present invention is further explained.
The first embodiment of the present invention is to provide the generation method that a kind of computer assisted hidden tooth rescues model, purpose
It is to be split by the monodentate cutting techniques based on model surface average curvature to single tooth, tooth and gum is divided
From effectively increasing segmentation precision；For every tooth, characteristic point (the nearly midpoint, remote midpoint, alveolus on tooth can be identified
Ridge vertex), and long axis of tooth and tooth rotation center are generated according to anatomic measurement result (corona height, root length), it establishes
Tooth moving coordinate system accurately reflects the actual anatomical features of tooth, effectively improves simulation precision；In the foundation of tooth model
In the process, solution of the root of the tooth automatic generation method based on Poisson's equation used, the root of the tooth curved surface that this method generates, Ke Yitong
When meet: complexity of coincideing gum line, smooth diseased Root Surfaces and reasonable root form.
As Figure 1-10 shows, a kind of computer assisted hidden tooth rescues the generation method of model, wherein including following step
It is rapid:
S1: scanning obtains upper dental arch model and mandibular dentition model, and is imported；
S2: upper dental arch model and mandibular dentition model are handled respectively；
S3: it is configured according to single tooth, calculates the nearly midpoint plane of generation, remote midpoint plane and long axis of tooth direction；
S4: long axis of tooth direction is adjusted according to clinical demand；
S5: coordinate system is established according to single tooth and long axis of tooth；
S6: calculating upper and lower dental arch model surface curvature, obtains surface curvature distribution model, generates tooth according to surface curvature distribution
The boundary curve of tooth-tooth and tooth-gingiva, and monodentate segmentation is carried out according to boundary curve；
S7: the scarce face on the gingival model generated after monodentate segmentation is filled up, it is bent on boundary condition to control mended face and gum face
Rate is continuous；
S8: tooth (corona) face and measurement gained root length information generated after being divided according to monodentate generates artificial tooth root；
S9: the gingival model after segmentation is assembled with tooth model, generates final invisalign model.
A kind of computer assisted hidden tooth provided in this embodiment rescues the generation method of model, to upper dental arch model with
Mandibular dentition model carries out processing and respectively includes following steps:
Upper dental arch model and mandibular dentition model are carried out respectively to simplify processing；
Fairing processing is carried out to upper dental arch model and mandibular dentition model respectively；
The position of dental arch model and mandibular dentition model in adjustment.
A kind of computer assisted hidden tooth provided in this embodiment rescues the generation method of model, and upper dental arch model is under
Reasonable positional relationship is established according to occluding relation between dental arch model.
A kind of computer assisted hidden tooth provided in this embodiment rescues the generation method of model, and it is flat to generate nearly midpoint
Face, remote midpoint plane, the method in long axis of tooth direction the following steps are included:
The nearly midpoint and remote midpoint of single tooth are set, and nearly midpoint, remote midpoint define every tooth near and far direction
General width；
The infradentale of single tooth is set, which defines every tooth in axial corona general height；
It is calculated according to the nearly midpoint of single tooth, remote midpoint and infradentale position and generates plane and long axis of tooth direction in close, remote.
A kind of computer assisted hidden tooth provided in this embodiment rescues the generation method of model, establishes the tool of coordinate system
Steps are as follows for body:
Tooth impedance center is calculated according to the projection of infradentale to long axis of tooth and measurement gained root length informix
Position, i.e. tooth moving coordinate system origin；
According to tooth impedance center, tooth is close, it is remote in plane vertical direction, long axis of tooth direction generates single tooth moving coordinate
System.
A kind of computer assisted hidden tooth provided in this embodiment rescues the generation method of model, by invisalign
The simulation that (translation and rotation) single tooth realizes invisalign process is moved on model, gum is generated in simulation process to calculate
Coefficient reasonably deformed.
To sum up, a kind of computer assisted hidden tooth of the invention rescues the generation method of model, can be by being based on mould
The monodentate cutting techniques of type surface average curvature are split single tooth, separate, effectively improve to tooth and gum
Segmentation precision；For every tooth, the characteristic point (nearly midpoint, remote midpoint, infradentale) on tooth, and root can be identified
Long axis of tooth and tooth rotation center are generated according to anatomic measurement result (corona height, root length), establishes tooth moving coordinate
System, accurately reflects the actual anatomical features of tooth, effectively improves simulation precision；In the establishment process of tooth model, use
Solution of the root of the tooth automatic generation method based on Poisson's equation, this method generate root of the tooth curved surface, can meet simultaneously: kiss
Complicated gum line, smooth diseased Root Surfaces and reasonable root form are closed, for virtual orthodontic treatment process, the deformation process of gum
Using efficient Weight deformation algorithm is more in line with, the characteristics of acquisition of weight meets physical deformation, which, which has, becomes
Shape calculating cost is minimum, has the features such as simulation effect well and calculating speed simultaneously for translation and rotation.
The specific embodiment of invention is described above.It is to be appreciated that invention be not limited to it is above-mentioned specific
Embodiment, devices and structures not described in detail herein should be understood as is practiced with the common mode in this field；
Those skilled in the art can make within the scope of the claims various deformations or amendments make it is several it is simple deduce, deformation or
Replacement, this has no effect on the substantive content of invention.
Claims (6)
1. the generation method that a kind of computer assisted hidden tooth rescues model, which comprises the following steps:
S1: scanning obtains upper dental arch model and mandibular dentition model, and is imported；
S2: the upper dental arch model and the mandibular dentition model are handled respectively；
S3: it is configured according to single tooth, calculates the nearly midpoint plane of generation, remote midpoint plane and long axis of tooth direction；
S4: long axis of tooth direction is adjusted according to clinical demand；
S5: coordinate system is established according to single tooth and long axis of tooth；
S6: calculating upper and lower dental arch model surface curvature, obtains surface curvature distribution model, generates tooth according to surface curvature distribution
The boundary curve of tooth-tooth and tooth-gingiva, and monodentate segmentation is carried out according to boundary curve；
S7: the scarce face on the gingival model generated after monodentate segmentation is filled up, it is bent on boundary condition to control mended face and gum face
Rate is continuous；
S8: tooth (corona) face and measurement gained root length information generated after being divided according to monodentate generates artificial tooth root；
S9: the gingival model after segmentation is assembled with tooth model, generates final invisalign model.
2. the generation method that a kind of computer assisted hidden tooth as described in claim 1 rescues model, which is characterized in that right
The upper dental arch model and the mandibular dentition model carry out processing and respectively include following steps:
The upper dental arch model and the mandibular dentition model are carried out respectively to simplify processing；
Fairing processing is carried out to the upper dental arch model and the mandibular dentition model respectively；
Adjust the position of the upper dental arch model Yu the mandibular dentition model.
3. the generation method that a kind of computer assisted hidden tooth as claimed in claim 2 rescues model, which is characterized in that institute
It states and reasonable positional relationship is established according to occluding relation between dental arch model and the mandibular dentition model.
4. the generation method that a kind of computer assisted hidden tooth as claimed in claim 3 rescues model, which is characterized in that raw
At nearly midpoint plane, remote midpoint plane, the method in long axis of tooth direction the following steps are included:
The nearly midpoint and remote midpoint of single tooth are set, and nearly midpoint, remote midpoint define every tooth near and far direction
General width；
The infradentale of single tooth is set, which defines every tooth in axial corona general height；
It is calculated according to the nearly midpoint of single tooth, remote midpoint and infradentale position and generates plane and long axis of tooth direction in close, remote.
5. the generation method that a kind of computer assisted hidden tooth as claimed in claim 4 rescues model, which is characterized in that build
Specific step is as follows for vertical coordinate system:
Tooth impedance center is calculated according to the projection of infradentale to long axis of tooth and measurement gained root length informix
Position, i.e. tooth moving coordinate system origin；
According to tooth impedance center, tooth is close, it is remote in plane vertical direction, long axis of tooth direction generates single tooth moving coordinate
System.
6. the generation method that a kind of computer assisted hidden tooth as claimed in claim 5 rescues model, which is characterized in that logical
It crosses and moves the simulation that (translation and rotation) single tooth realizes invisalign process on invisalign model, simulation process dens in dente
Gum is reasonably deformed with the coefficient for calculating generation.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110623760A (en) * | 2019-09-20 | 2019-12-31 | 上海正雅齿科科技股份有限公司 | Tooth correction scheme generation method based on pre-experience and electronic commerce system |
| CN111275808A (en) * | 2019-12-06 | 2020-06-12 | 上海正雅齿科科技股份有限公司 | Method and device for establishing orthodontic model |
| CN111407440A (en) * | 2020-03-31 | 2020-07-14 | 上海正雅齿科科技股份有限公司 | Shell-shaped dental instrument and design method and preparation method thereof |
| CN111437048A (en) * | 2020-04-01 | 2020-07-24 | 上海正雅齿科科技股份有限公司 | Rotation center design inspection method, shell-shaped dental instrument design and preparation method |
| CN111437047A (en) * | 2020-04-01 | 2020-07-24 | 上海正雅齿科科技股份有限公司 | Rotation center design inspection method, shell-shaped dental instrument design and preparation method |
| CN111991106A (en) * | 2020-08-17 | 2020-11-27 | 苏州瀚华智造智能技术有限公司 | Automatic tooth socket cutting line generation method and application |
| CN114652467A (en) * | 2022-03-17 | 2022-06-24 | 杭州爱新芽医疗科技有限公司 | Computer-aided tooth bracket-free invisible correction method |
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| CN117942179A (en) * | 2024-03-21 | 2024-04-30 | 沈阳市口腔医院 | Digital orthodontic bow expander design method based on AI technology |
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| CN110623760A (en) * | 2019-09-20 | 2019-12-31 | 上海正雅齿科科技股份有限公司 | Tooth correction scheme generation method based on pre-experience and electronic commerce system |
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| CN111437047B (en) * | 2020-04-01 | 2021-12-28 | 正雅齿科科技(上海)有限公司 | Rotation center design inspection method, shell-shaped dental instrument design and preparation method |
| CN111437047A (en) * | 2020-04-01 | 2020-07-24 | 上海正雅齿科科技股份有限公司 | Rotation center design inspection method, shell-shaped dental instrument design and preparation method |
| CN111437048A (en) * | 2020-04-01 | 2020-07-24 | 上海正雅齿科科技股份有限公司 | Rotation center design inspection method, shell-shaped dental instrument design and preparation method |
| CN111991106B (en) * | 2020-08-17 | 2021-11-23 | 苏州瀚华智造智能技术有限公司 | Automatic tooth socket cutting line generation method and application |
| CN111991106A (en) * | 2020-08-17 | 2020-11-27 | 苏州瀚华智造智能技术有限公司 | Automatic tooth socket cutting line generation method and application |
| CN114652467A (en) * | 2022-03-17 | 2022-06-24 | 杭州爱新芽医疗科技有限公司 | Computer-aided tooth bracket-free invisible correction method |
| CN114652467B (en) * | 2022-03-17 | 2023-12-12 | 杭州爱新芽医疗科技有限公司 | Tooth bracket-free invisible correction method based on computer assistance |
| CN117934885A (en) * | 2024-03-21 | 2024-04-26 | 沈阳市口腔医院 | Coordinate automatic matching method and system based on CBCT data and three-dimensional facial scan data |
| CN117942179A (en) * | 2024-03-21 | 2024-04-30 | 沈阳市口腔医院 | Digital orthodontic bow expander design method based on AI technology |
| CN117942179B (en) * | 2024-03-21 | 2024-05-28 | 沈阳市口腔医院 | Digital orthodontic bow expander design method based on AI technology |
| CN117934885B (en) * | 2024-03-21 | 2024-06-18 | 沈阳市口腔医院 | Coordinate automatic matching method and system based on CBCT data and three-dimensional facial scan data |
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Effective date of registration: 20210720 Address after: 314109 floors 1-2 and 3 of plant 1, No. 666, Tianning Avenue, Tianning Town, Jiashan County, Jiaxing City, Zhejiang Province Applicant after: Zhejiang youyiji oral medical instrument Co.,Ltd. Address before: 201318 3rd floor, building 12, no.1-28, Lane 588, Tianxiong Road, Pudong New Area, Shanghai Applicant before: SHANGHAI UEG MEDICAL INSTRUMENT Co.,Ltd. |
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Application publication date: 20190913 |