CN104537135B - Establish the computer-implemented method of teeth occluding relation - Google Patents
Establish the computer-implemented method of teeth occluding relation Download PDFInfo
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- CN104537135B CN104537135B CN201410597203.3A CN201410597203A CN104537135B CN 104537135 B CN104537135 B CN 104537135B CN 201410597203 A CN201410597203 A CN 201410597203A CN 104537135 B CN104537135 B CN 104537135B
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Abstract
The present invention provides a kind of computer-implemented method for establishing teeth occluding relation, under three-dimensional visualization environment, by intuitively image and objective quantizating index, to aid in doctor to establish new occluding relation model on computers, the surgical intervention of correction and orthognathous is preferably instructed.The method of the present invention includes following steps：1) gather and read the three-dimensional data model of mandibular dentition；2) sharp nest corresponding points are chosen on the three-dimensional data model of denture；3) lower jaw point cloud distance on sharp nest corresponding points vector sum is calculated, shows that sharp nest corresponds to vectogram and two dimension collision detection chromatogram；4) moving three dimension data model, until upper lower jaw is in a good occlusion correspondence；5) three-dimensional impact model is calculated；6) the upper mandibular dentition three-dimensional data model obtained to the three-dimensional impact model calculated with step 4) carries out Boolean calculation, removes interference, obtains virtually being engaged model；7) the virtual occlusion model of foundation is preserved and exported.
Description
Technical field
The present invention relates to CAD, Visual analysis techniques field, more particularly to establishing teeth occluding relation
Computer-implemented method.
Background technology
It is one of important goal of Oral and Maxillofacial Surgery to establish teeth occluding relation that is good, stablizing.Also therefore, exist
Good occluding relation last eventually is determined in treatment, is the important content of operation designing.Conventional method is manually to adjust patient
The plaster cast of tooth determines last occluding relation eventually, and the following method of generally use determines last occluding relation eventually：Doctor is in gypsum
After model match-place occluding relation, the occluding relation is digitized by laser scanning, then could be real by complicated registration process
Existing occluding relation is merged with bone piece.The shortcomings that this method, includes：1) it is time-consuming and laborious；2) special installation is needed to support, such as laser
Scanner；3) doctor determines to can't see bone information during occluding relation, influences the judgement to last occluding relation eventually.Therefore, it is traditional
On the one hand method places one's entire reliance upon the experience of doctor, not enough intuitively；On the other hand the advantage of CAD is not played.
Becoming increasingly popular and applying with Computer-aided Design Technology, virtual osteotomy, virtual in place, soft tissue prediction etc.
Operation can operate completion under software environment, but rarely have the standard that occluding relation is established under virtual environment both at home and abroad at present
Really, effective ways.Only report is the process of the complete simulation model operation under software environment, and adds collision detection algorithm
The defects of under compensation software environment without gypsum sense of touch.But the addition of collision detection causes to calculate time lengthening, and real-time is poor, operation
Person (doctor) can not receive.
As Computer-aided Design Technology is in the extensive use of Oral and Maxillofacial Surgery, there is an urgent need in virtual environment
Under the accurate and effective solution for establishing occluding relation.
The content of the invention
A kind of computer-implemented method for establishing teeth occluding relation of present invention offer, view-based access control model analysis principle,
Under three-dimensional visualization environment, by intuitively image and objective quantizating index, to aid in doctor to establish on computers newly
Occluding relation model, preferably to instruct the surgical intervention of correction and orthognathous.
The technical scheme is that：
1. a kind of computer-implemented method for establishing teeth occluding relation, it is characterised in that comprise the following steps：
1) gather and read the three-dimensional data model of mandibular dentition, including CT three-dimensional reconstructions data or tooth three-dimensional scanning
Data；
2) sharp nest corresponding points are chosen on the three-dimensional data model of denture, lower jaw on several is marked respectively and corresponds
Cusp mark point and tooth nest mark point；
3) lower jaw point cloud distance on sharp nest corresponding points vector sum is calculated, shows that sharp nest corresponds to vectogram and two dimension collision detection
Chromatogram；
4) moving three dimension data model, that is, under fixing (on) jaw, in any axis translation of three-dimensional system of coordinate lower edge and rotation
(under) jaw, until upper lower jaw is in a good occlusion correspondence；
5) real time collision detection of three-dimensional visualization is provided, calculates three-dimensional impact model；
6) the three-dimensional impact model calculated to three-dimensional impact detection, the upper mandibular dentition three-dimensional data obtained with step 4)
Model carries out Boolean calculation, removes interference, obtains establishing the virtual occlusion model of upper and lower denture pair sum；
7) the virtual occlusion model of foundation is preserved and exported.
2. further, in the step 1), the three-dimensional data includes passing through 3-D scanning or CT data three-dimensional weights
Build, the three-dimensional data for the general format that the computer aided design software such as STL, wrl, obj can read and edit；Read
, it is necessary to keep its coordinate system constant during three-dimensional data.
3. further, in the step 2), the quantity for choosing sharp nest corresponding points is：Incisor is at least one；Canine tooth and double
Canine tooth at least two；Grind one's teeth in sleep as four.
4. further, in the step 2), the correspondence of sharp nest corresponding points is：The nearly midpoint of maxillary incior corresponds to lower jaw
The nearly midpoint of incisor；The remote midpoint of eye tooth corresponds to mandibular canine cusp, and eye tooth cusp point corresponds to the nearly midpoint of lower jaw canine tooth；
Upper jaw bicuspid tongue side cusp point corresponds to the double pointed sound of baby talk den of lower jaw, and the double pointed sound of baby talk den of the upper jaw corresponds to lower jaw bicuspid cheek side tooth
Cusp；The nearly dens in dente cusp of maxillary molar tongue side corresponds to the nearly dens in dente den of lower molar, and Molars dens in dente den corresponds to lower jaw
Grind one's teeth in sleep the nearly dens in dente cusp in cheek side, the remote dens in dente cusp of maxillary molar tongue side corresponds to the remote dens in dente den of lower molar, during maxillary molar is remote
Tooth den corresponds to the remote dens in dente cusp in lower molar cheek side.
5. further, in the step 3), the point nest corresponds to vectogram be upper jaw point den corresponding thereto under
Projection vector of the three-dimensional vector that jaw point den is formed in pairs on section, prompts sharp nest to correspond to its length and direction
Situation.
6. further, in the step 3), the two dimension collision detection chromatogram is according to upper lower jaw point cloud distance
Real-time statistics, by calculating the distance of upper lower jaw point cloud, and the Two way chromatograms image being converted into jaw plane, for real-time
Prompt position of collision and collision depth.
7. further, in the step 4), the translation and rotation include by reference axis translation, rotation and by it is any to
Amount translation, rotation, and any point that pivot can be defined as during rotation in a cloud.
8. further, in the step 4), the translation and rotating implementation include input numerical value and use mouse
Drag object shifter interactively realizes translation and rotation on three directions.
9. further, in the step 5), the three-dimensional impact model is to collide upper lower jaw, i.e. two three-dimensional datas
Intersection, be converted into editable tri patch data, and Three-dimensional Display.
10. it is further, in the step 7), after establishing virtual occluding relation, when model is preserved and exported, keep it
Coordinate system is constant.
The technique effect of the present invention：
A kind of computer-implemented method for establishing teeth occluding relation provided by the invention, realizes and is calculating completely
The function of occluding relation is established in machine virtual environment, instead of cumbersome manual operations, can be under three-dimensional visualization environment
Doctor provides more directly perceived and objective reference data, by intuitively image and objective quantizating index, to aid in doctor to exist
New occluding relation model is established on computer, the treatment to correction and orthognathous has important directive significance.Importantly,
The occluding relation result of foundation can be directly applied to follow-up virtual design, avoid and obtain occluding relation by scanning
Error.
Brief description of the drawings
Fig. 1 is a kind of flow chart for the computer-implemented method for establishing teeth occluding relation of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings, but the protection content of the present invention is not limited to this.
As shown in Figure 1, it is a kind of flow chart for the computer-implemented method for establishing teeth occluding relation of the present invention.
1. a kind of computer-implemented method for establishing teeth occluding relation, comprises the following steps：
1) gather and read the three-dimensional data model of mandibular dentition, including CT three-dimensional reconstructions data or tooth three-dimensional scanning
Data；
In step 1), the three-dimensional data includes what is rebuild by 3-D scanning or CT data three-dimensionals, STL,
The general lattice that the CADs such as wrl, obj (Computer Assisted Design, CAD) software can read and edit
The three-dimensional data of formula；, it is necessary to keep its coordinate system constant when reading three-dimensional data.
2) sharp nest corresponding points are chosen on the three-dimensional data model of denture, lower jaw on several is marked respectively and corresponds
Cusp mark point and tooth nest mark point；
In step 2), the quantity for choosing sharp nest corresponding points is：Incisor is at least one；Canine tooth and bicuspid at least two；
Grind one's teeth in sleep as four.The correspondence of sharp nest corresponding points is：The nearly midpoint of maxillary incior corresponds to the nearly midpoint of mandibular incisors；Eye tooth is remote
Midpoint corresponds to mandibular canine cusp, and eye tooth cusp point corresponds to the nearly midpoint of lower jaw canine tooth；Upper jaw bicuspid tongue side cusp point
The corresponding double pointed sound of baby talk den of lower jaw, the double pointed sound of baby talk den of the upper jaw corresponds to lower jaw bicuspid cheek side cusp point；Maxillary molar tongue side is near
Dens in dente cusp corresponds to the nearly dens in dente den of lower molar, and Molars dens in dente den corresponds to the nearly dens in dente cusp in lower molar cheek side,
The remote dens in dente cusp of maxillary molar tongue side corresponds to the remote dens in dente den of lower molar, and the remote dens in dente den of maxillary molar corresponds to lower molar cheek
The remote dens in dente cusp in side.
3) lower jaw point cloud distance on sharp nest corresponding points vector sum is calculated, shows that sharp nest corresponds to vectogram and two dimension collision detection
Chromatogram；
In step 3), it is described point nest corresponds to vectogram be the lower jaw point den of upper jaw point den corresponding thereto in pairs
Projection vector of the three-dimensional vector of composition on section, prompts sharp nest corresponding situation with its length and direction.The collision
It is the real-time statistics according to upper lower jaw point cloud distance to detect chromatogram, by calculating the distance of upper lower jaw point cloud, and is converted
For the Two way chromatograms image in jaw plane, for real-time prompting position of collision and depth is collided.
4) moving three dimension data model, that is, under fixing (on) jaw, in any axis translation of three-dimensional system of coordinate lower edge and rotation
(under) jaw, until upper lower jaw is in a good occlusion correspondence；Often complete step translation or rotate, it is necessary to re-start
Two dimension collision detects the calculating of vector corresponding with sharp nest；
In step 4), the translation and rotation include pressing reference axis translation, rotation and translate, rotate by any vector, and
Any point that pivot can be defined as during rotation in a cloud.The translation and rotating implementation include input number
Value and interactively realize translation and rotation on three directions with mouse drag object shifter.
5) three-dimensional visual real time collision detection is provided, calculates three-dimensional impact model；
In step 5), the three-dimensional impact model is to collide upper lower jaw, i.e., the intersection of two three-dimensional datas, conversion
For editable tri patch data, and Three-dimensional Display.
6) the three-dimensional impact model data calculated to three-dimensional impact detection, the upper mandibular dentition obtained with step 4) are three-dimensional
Model data carries out Boolean calculation, removes and disturbs, and realizes and adjusts jaw function automatically, obtains establishing virtually stinging for upper and lower denture pair sum
Molding type.
7) obtained virtual occlusion model is preserved and exported.
In step 7), after establishing virtual occluding relation, when model is preserved and exported, keep its coordinate system constant.
It is hereby stated that described above contribute to skilled artisan understands that the invention, but not limit the present invention
The protection domain of creation.It is any that equivalent substitution described above, modification are improved without departing from the invention substantive content
And/or the implementation deleted numerous conform to the principle of simplicity and carried out, each fall within the protection domain of the invention.
Claims (10)
1. a kind of computer-implemented method for establishing teeth occluding relation, it is characterised in that comprise the following steps：
1) gather and read the three-dimensional data model of mandibular dentition, including CT three-dimensional reconstructions data or tooth three-dimensional scanning number
According to；
2) sharp nest corresponding points are chosen on the three-dimensional data model of denture, mark the tooth that lower jaw corresponds on several respectively
Sharp mark point and tooth nest mark point；
3) lower jaw point cloud distance on sharp nest corresponding points vector sum is calculated, shows that sharp nest corresponds to vectogram and two dimension collision detection chromatography
Figure；
4) moving three dimension data model, i.e., fixed lower jaw or the upper jaw are another in any axis translation of three-dimensional system of coordinate lower edge and rotation
One jaw, until upper lower jaw is in a good occlusion correspondence；
5) three-dimensional visual real time collision detection is provided, calculates three-dimensional impact model；
6) the three-dimensional impact model calculated to three-dimensional impact detection, the upper mandibular dentition three-dimensional data model obtained with step 4)
Boolean calculation is carried out, removes interference, obtains establishing the virtual occlusion model of upper and lower denture pair sum；
7) the virtual occlusion model of foundation is preserved and exported.
2. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that described
In step 1), the three-dimensional data includes what is rebuild by 3-D scanning or CT data three-dimensionals, and STL, wrl, obj are calculated
The three-dimensional data for the general format that machine Autocad can read and edit；, it is necessary to keep its coordinate when reading three-dimensional data
It is constant.
3. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that described
In step 2), the quantity for choosing sharp nest corresponding points is：Incisor is at least one；Canine tooth and bicuspid at least two；Grind one's teeth in sleep as four
It is a.
4. the computer-implemented method according to claim 3 for establishing teeth occluding relation, it is characterised in that into one
Step, in the step 2), the correspondence of sharp nest corresponding points is：The nearly midpoint of maxillary incior corresponds to the nearly midpoint of mandibular incisors；On
Jaw canine distal midpoint corresponds to mandibular canine cusp, and eye tooth cusp point corresponds to the nearly midpoint of lower jaw canine tooth；Upper jaw bicuspid tongue
Side cusp point corresponds to the double pointed sound of baby talk den of lower jaw, and the double pointed sound of baby talk den of the upper jaw corresponds to lower jaw bicuspid cheek side cusp point；The upper jaw is ground
The nearly dens in dente cusp of tooth tongue side corresponds to the nearly dens in dente den of lower molar, Molars dens in dente den correspond to lower molar cheek side it is near in
Cusp point, the remote dens in dente cusp of maxillary molar tongue side corresponds to the remote dens in dente den of lower molar, under the remote dens in dente den of maxillary molar corresponds to
Jaw is ground one's teeth in sleep the remote dens in dente cusp in cheek side.
5. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that into one
Step, in the step 3), it is the lower jaw point den of upper jaw point den corresponding thereto two-by-two one that the point nest, which corresponds to vectogram,
Projection vector of the three-dimensional vector that group is formed on section, prompts sharp nest corresponding situation with its length and direction.
6. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that described
In step 3), the two dimension collision detection chromatogram is the real-time statistics according to upper lower jaw point cloud distance, by calculating upper lower jaw
The distance of point cloud, and the Two way chromatograms image being converted into jaw plane, for real-time prompting position of collision and collision depth.
7. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that into one
Step, in the step 4), the translation and rotation include pressing reference axis translation, rotation and translate, rotate by any vector, and
Any point that pivot can be defined as during rotation in a cloud.
8. the computer-implemented method according to claim 7 for establishing teeth occluding relation, it is characterised in that described
In step 4), the translation and rotating implementation include input numerical value and with mouse drag object shifter come interactively
Realize the translation and rotation on three directions.
9. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that into one
Step, in the step 5), the three-dimensional impact model is to collide upper lower jaw, i.e., the intersection of two three-dimensional datas, is turned
Turn to editable tri patch data, and Three-dimensional Display.
10. the computer-implemented method according to claim 1 for establishing teeth occluding relation, it is characterised in that into
One step, in the step 7), after establishing virtual occluding relation, when model is preserved and exported, keep its coordinate system constant.
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| CN105893739B (en) * | 2016-03-28 | 2018-02-09 | 杭州美齐科技有限公司 | A kind of collision checking method calculated for upper lower jaw engagement region |
| CN108403234B (en) * | 2018-02-26 | 2020-08-11 | 北京正齐口腔医疗技术有限公司 | Tooth arrangement method and device |
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| CN111696191A (en) * | 2019-03-14 | 2020-09-22 | 杭州朝厚信息科技有限公司 | Method and computer system for determining occlusion relation between upper and lower teeth |
| CN109935334A (en) * | 2019-03-22 | 2019-06-25 | 杭州师范大学 | Use the depth profile of layering and the virtual bracket exchange method of Point set matching |
| CN110164558B (en) * | 2019-05-27 | 2023-05-26 | 上海埃蒙迪材料科技股份有限公司 | Tooth model parameterization method |
| CN112022409B (en) * | 2019-06-04 | 2022-07-01 | 先临三维科技股份有限公司 | Occlusion method and device for tooth scanning data, storage medium and processor |
| JP2022543195A (en) * | 2019-07-18 | 2022-10-11 | スリーエム イノベイティブ プロパティズ カンパニー | Virtual occlusion in orthodontic and dental treatment planning |
| CN112932695B (en) * | 2019-12-10 | 2023-07-11 | 杭州朝厚信息科技有限公司 | Method for judging adjacent surface glaze removing time by computer |
| CN111292320B (en) * | 2020-03-12 | 2023-01-24 | 中国人民解放军第四军医大学 | Occlusion evaluation method and system based on three-dimensional digital model and machine learning |
| CN111728720A (en) * | 2020-03-12 | 2020-10-02 | 北京大学口腔医学院 | Computer aided design method for deciding orthodontic orthognathic combined treatment operation time |
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