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 PDF

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Publication number
CN110226978A
CN110226978A CN201810182586.6A CN201810182586A CN110226978A CN 110226978 A CN110226978 A CN 110226978A CN 201810182586 A CN201810182586 A CN 201810182586A CN 110226978 A CN110226978 A CN 110226978A
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tooth
model
midpoint
generation method
rescues
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盛华山
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Zhejiang youyiji oral medical instrument Co.,Ltd.
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Shanghai Excellent Medical Instrument Co Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002Orthodontic computer assisted systems
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

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

A kind of computer assisted hidden tooth rescues the generation method of model
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.
CN201810182586.6A 2018-03-06 2018-03-06 A kind of computer assisted hidden tooth rescues the generation method of model Pending CN110226978A (en)

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
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
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

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CN105748163A (en) * 2016-02-05 2016-07-13 杭州美齐科技有限公司 Design method for computer-aided bracket-free concealed teeth correcting equipment
CN106137414A (en) * 2015-04-14 2016-11-23 上海时代天使医疗器械有限公司 Determine the method and system of target dentition layout

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CN1686058A (en) * 2005-04-28 2005-10-26 上海隐齿丽医学技术有限公司 Computer assisted hidden tooth abnormal correction system
CN103932807A (en) * 2013-01-18 2014-07-23 无锡时代天使医疗器械科技有限公司 Method for acquiring tooth target orthodontics state, method for producing tooth corrector and tooth corrector thereof
CN106137414A (en) * 2015-04-14 2016-11-23 上海时代天使医疗器械有限公司 Determine the method and system of target dentition layout
CN105046750A (en) * 2015-08-24 2015-11-11 杭州美齐科技有限公司 Method for automatically segmenting whole dental triangular mesh model
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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
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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
CN111407440B (en) * 2020-03-31 2022-02-01 正雅齿科科技(上海)有限公司 Shell-shaped dental instrument and design method and preparation method thereof
CN111437048B (en) * 2020-04-01 2022-01-25 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
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.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190913