CN106228616A - A kind of method repairing corona proximal surface in three-dimensional tooth model - Google Patents
A kind of method repairing corona proximal surface in three-dimensional tooth model Download PDFInfo
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- CN106228616A CN106228616A CN201610569916.8A CN201610569916A CN106228616A CN 106228616 A CN106228616 A CN 106228616A CN 201610569916 A CN201610569916 A CN 201610569916A CN 106228616 A CN106228616 A CN 106228616A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2219/00—Indexing scheme for manipulating 3D models or images for computer graphics
- G06T2219/008—Cut plane or projection plane definition
Abstract
The invention discloses a kind of method repairing corona proximal surface in three-dimensional tooth model, including: from data base, extract tooth model border point set；Proximal surface border, the left and right point set extracting tooth model is concentrated at boundary point；Successively for left margin and right margin, perform following steps: interpolation point at a certain distance between the first and last end points of left margin or right margin, it is thus achieved that closed loop border point set；Calculate closed loop border barycenter, make closed loop border point set gather interpolation point set V to barycenter；Closed loop border point set is generated triangular facet set with point set V；Calculating tooth model barycenter, adjust point set V position with this barycenter, the curvature trend with tooth model that is allowed to keeps consistent.Energy precise restoration of the present invention is the adjacent teeth proximal contact relation of excalation because of tooth slicing operation.
Description
Technical field
The present invention relates to computer application field, the method particularly relating to repair corona proximal surface.
Background technology
By the tooth model of 3D scanning patient, obtain the three-dimensional tooth model file that can show in a computer.Adjacent
It is the computer software by specialty that face is repaired, to each the three-dimensional tooth corona model proximal surface lack part obtained after cutting
Carry out the operation rebuild.Repaired by corona proximal surface, to can with precise restoration because of tooth slicing operation the phase of excalation
Adjacent teeth tooth proximal contact relation, designs, for next step, the scheme of rescuing and provides patient teeth's threedimensional model accurately.
But, lack corona proximal surface method for repairing and mending effective, accurate at present, it is impossible to precise restoration is because of tooth slicing operation
The adjacent teeth proximal contact relation of excalation, thus be the most just difficult for next step and offer foundation is provided.
Summary of the invention
A kind of method that it is an object of the invention to repair corona proximal surface in three-dimensional tooth model, energy precise restoration is because of tooth
Tooth slicing operation and the adjacent teeth proximal contact relation of excalation.
The technical scheme realizing above-mentioned purpose is:
A kind of method repairing corona proximal surface in three-dimensional tooth model, including:
Tooth model border point set is extracted from data base；
Proximal surface border, the left and right point set extracting tooth model is concentrated at boundary point；
Successively for left margin and right margin, execution following steps:
Interpolation point at a certain distance between the first and last end points of left margin or right margin, it is thus achieved that closed loop border point set；
Calculate closed loop border barycenter, make closed loop border point set gather interpolation point set V to barycenter；
Closed loop border point set is generated triangular facet set with point set V；
Calculating tooth model barycenter, adjust point set V position with this barycenter, the curvature trend with tooth model that is allowed to keeps one
Cause.
Repairing in above-mentioned three-dimensional tooth model in the method for corona proximal surface, the generation method of described interpolation point is:
Calculate vector n 1/ | n1 | of end point e to first point s, generate interpolation point by formula p=e+i*n1*delta, wherein
Delta is interpolation distance, i=1, if ep distance is less than es distance, then and i=i+1；Otherwise, interpolation is stopped.
Repairing in above-mentioned three-dimensional tooth model in the method for corona proximal surface, described interpolation method of gathering is:
Calculating closed loop border point set Pi (i=0 ... n) barycenter o, is end point for closed loop point P0, the P0 that sets up an office, headed by barycenter o
Point, uses interpolation point to generate method interpolation；I=i+1, repetition above step to i=n.
Above-mentioned three-dimensional tooth model is repaired in the method for corona proximal surface, the position side of described adjustment point set V
Method:
Calculate closed loop boundary point collection central point O2, calculate respectively point set Vi (i=0 ... N) to distance di of O2, and calculate
Meansigma methods ave of 1/di, updating point is Vi=O1+k*n2*di/ave, and wherein k is adjustment factor, and n2 is that tooth model barycenter arrives
The vector of some Vi.
The invention has the beneficial effects as follows: the proximal surface that causes because of tooth three-dimensional model slicing operation of completion of the present invention
Part, the precise restoration 3 D anatomical feature of every tooth, discharge tooth operation provides real user's tooth model, it is ensured that set
The scheme of rescuing of meter and appliance product and user's perfection are fitted.
Accompanying drawing explanation
Fig. 1 be the present invention three-dimensional tooth model in repair the flow chart of method of corona proximal surface.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1, the method repairing corona proximal surface in the three-dimensional tooth model of the present invention, comprise the following steps:
Step S1, extracts tooth model border point set from data base.
Step S2, concentrates proximal surface border, the left and right point set extracting tooth model at boundary point.
Successively for left margin and right margin, execution following steps:
Step S3, interpolation point at a certain distance between the first and last end points of left margin or right margin, it is thus achieved that closed loop boundary point
Collection.Interpolation point generates method: calculate vector n 1/ | n1 | of end point e to first point s, by formula p=e+i*n1*delta (wherein
Delta is interpolation distance, is set to 0.2mm, i=1 at this) generate interpolation point, if ep distance is less than es distance, then i=i+1；No
Then, interpolation is stopped.
Step S4, calculates closed loop border barycenter, makes closed loop border point set gather interpolation point set V to barycenter.Concrete gathers
Interpolation method is: and calculating closed loop border point set Pi (i=0 ... n) barycenter o, is end point, barycenter o for closed loop point P0, the P0 that sets up an office
For first point, interpolation point is used to generate method interpolation；I=i+1, repetition above step to i=n.Then, closed loop boundary point and interpolation
The point set obtained is for gathering interpolation point set.
Closed loop border point set is generated triangular facet set with point set V, it may be assumed that according to existing delaunay triangulation methodology
It is opened up benefit rebuild, obtain triangle sets.
Step S5, calculates tooth model barycenter O1, adjusts point set V position with this barycenter O1, is allowed to the song with tooth model
Rate trend keeps consistent.Complete interproximal tooth coating to repair.Wherein, the location method of point set V is adjusted: calculate closed loop boundary point and concentrate
Heart point O2, calculate respectively point set Vi (i=0 ... N) to distance di of O2, and calculate meansigma methods ave of 1/di, update point for Vi
=O1+k*n2*di/ave, wherein k is adjustment factor, is set to 1.2 at this, and n2 is the barycenter O1 vector to some Vi.
Central point defines: and traversal closed loop border point set Bi (i=0 ... t), central point=(B0+B1+ ... .+Bt)/t.
Barycenter defines: and traversal tooth model summit Si (i=0 ... n), barycenter=(S0+S1+ ... .+Sn)/n.
Above example is used for illustrative purposes only, rather than limitation of the present invention, about the technology people of technical field
Member, without departing from the spirit and scope of the present invention, it is also possible to make various conversion or modification, the most all equivalents
Technical scheme also should belong to scope of the invention, should be limited by each claim.
Claims (4)
1. the method repairing corona proximal surface in a three-dimensional tooth model, it is characterised in that including:
Tooth model border point set is extracted from data base；
Proximal surface border, the left and right point set extracting tooth model is concentrated at boundary point；
Successively for left margin and right margin, execution following steps:
Interpolation point at a certain distance between the first and last end points of left margin or right margin, it is thus achieved that closed loop border point set；
Calculate closed loop border barycenter, make closed loop border point set gather interpolation point set V to barycenter；
Closed loop border point set is generated triangular facet set with point set V；
Calculating tooth model barycenter, adjust point set V position with this barycenter, the curvature trend with tooth model that is allowed to keeps consistent.
The method repairing corona proximal surface in three-dimensional tooth model the most according to claim 1, it is characterised in that described slotting
The generation method of value point is:
Calculating vector n 1/ | n1 | of end point e to first point s, generate interpolation point by formula p=e+i*n1*delta, wherein delta is
Interpolation distance, i=1, if ep distance is less than es distance, then i=i+1；Otherwise, interpolation is stopped.
The method repairing corona proximal surface in three-dimensional tooth model the most according to claim 1, it is characterised in that described
Gathering interpolation method is:
Calculating closed loop border point set Pi (i=0 ... n) barycenter o, is end point for closed loop point P0, the P0 that sets up an office, and barycenter o is first point,
Interpolation point is used to generate method interpolation；I=i+1, repetition above step to i=n.
The method repairing corona proximal surface in three-dimensional tooth model the most according to claim 1, it is characterised in that described
The location method of adjustment point set V:
Calculate closed loop boundary point collection central point O2, calculate respectively point set Vi (i=0 ... N) to distance di of O2, and calculate 1/di
Meansigma methods ave, update point for Vi=O1+k*n2*di/ave, wherein k is adjustment factor, and n2 is that tooth model barycenter is to putting a Vi
Vector.
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| CN201610569916.8A CN106228616B (en) | 2016-07-19 | 2016-07-19 | The method of corona adjacent surface is repaired in a kind of three-dimensional tooth model |
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| CN201610569916.8A CN106228616B (en) | 2016-07-19 | 2016-07-19 | The method of corona adjacent surface is repaired in a kind of three-dimensional tooth model |
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| CN106228616A true CN106228616A (en) | 2016-12-14 |
| CN106228616B CN106228616B (en) | 2019-04-30 |
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Cited By (4)
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| CN108567501A (en) * | 2017-03-14 | 2018-09-25 | 无锡时代天使医疗器械科技有限公司 | The method for reconstructing of interproximal tooth coating |
| CN108670451A (en) * | 2018-05-04 | 2018-10-19 | 上海正雅齿科科技股份有限公司 | Interproximal tooth coating method for repairing and mending, device, user terminal and storage medium |
| CN111563900A (en) * | 2020-04-01 | 2020-08-21 | 上海正雅齿科科技股份有限公司 | Method for repairing digital dental crown model, designing shell-shaped dental appliance and preparing same |
| WO2024078361A1 (en) * | 2022-10-10 | 2024-04-18 | 杭州朝厚信息科技有限公司 | Method for reconstructing approximal surface of three-dimensional digital model of tooth |
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| CN108567501A (en) * | 2017-03-14 | 2018-09-25 | 无锡时代天使医疗器械科技有限公司 | The method for reconstructing of interproximal tooth coating |
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| CN108670451A (en) * | 2018-05-04 | 2018-10-19 | 上海正雅齿科科技股份有限公司 | Interproximal tooth coating method for repairing and mending, device, user terminal and storage medium |
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| CN111563900A (en) * | 2020-04-01 | 2020-08-21 | 上海正雅齿科科技股份有限公司 | Method for repairing digital dental crown model, designing shell-shaped dental appliance and preparing same |
| CN111563900B (en) * | 2020-04-01 | 2023-04-25 | 正雅齿科科技(上海)有限公司 | Method for repairing digital dental crown model and designing and preparing shell-shaped dental appliance |
| WO2024078361A1 (en) * | 2022-10-10 | 2024-04-18 | 杭州朝厚信息科技有限公司 | Method for reconstructing approximal surface of three-dimensional digital model of tooth |
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| CN106228616B (en) | 2019-04-30 |
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Effective date of registration: 20211109 Address after: 201800 3rd floor, No.5 factory building, Lane 615, Fengdeng Road, Malu Town, Jiading District, Shanghai Patentee after: Shanghai Emendi Material Technology Co.,Ltd. Address before: 201306 room 25077, area 1, building 1, No.888, Huanhu West 2nd Road, Nanhui new town, Pudong New Area, Shanghai Patentee before: SHANGHAI AISHENGMEI TECHNOLOGY CO.,LTD. |