CN104537135A - Computer-aided design method for building tooth occluding relation - Google Patents
Computer-aided design method for building tooth occluding relation Download PDFInfo
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- CN104537135A CN104537135A CN201410597203.3A CN201410597203A CN104537135A CN 104537135 A CN104537135 A CN 104537135A CN 201410597203 A CN201410597203 A CN 201410597203A CN 104537135 A CN104537135 A CN 104537135A
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Abstract
The invention provides a computer-aided design method for building a tooth occluding relation. In a three-dimensional visual environment, a doctor is assisted to build a new occluding relation model on a computer through an intuitive image and an objective quantitative index, so that orthodontic and orthognathous surgical treatment are better guided. The method comprises the following steps: (1) acquiring and reading a three-dimensional data models of upper and lower jaw dentitions; (2) selecting canine fossa corresponding points from the three-dimensional data model of the dentitions; (3) calculating canine fossa corresponding point vectors and a point cloud distance between upper and lower jaws, and displaying a canine fossa corresponding vector diagram and a two-dimensional collision detection chromatogram; (4) moving the three-dimensional data model till the upper and lower jaws are under a good occluding corresponding relation; (5) calculating a three-dimensional collision model; (6) performing Boolean operation on the calculated three-dimensional collision model and the three-dimensional data model of the upper and lower jaw dentitions obtained in the step (4), and removing interference to obtain a virtual occluding model; and (7) saving the built virtual occluding model, and exporting the saved virtual occluding model.
Description
Technical field
The present invention relates to computer-aided design (CAD), Visual analysis techniques field, particularly relate to the computer-implemented method setting up teeth occluding relation.
Background technology
Setting up good, stable teeth occluding relation is one of important goal of Oral and Maxillofacial Surgery.Also therefore, determining good end last occluding relation in the treatment, is the important content of operation designing.Classic method is that the plaster cast manually adjusting patient teeth determines last occluding relation eventually, usually adopt and determine last occluding relation eventually with the following method: doctor is after plaster cast match-place occluding relation, by laser scanning by this occluding relation digitizing, then the fusion of occluding relation and bone block could be realized by complicated registration process.The shortcoming of the method comprises: 1) waste time and energy; 2) specific installation support is needed, as laser scanner; 3) can't see bone information when doctor determines occluding relation, affect the judgement to whole last occluding relation.Therefore, classic method places one's entire reliance upon on the one hand the experience of doctor, not intuitively; Do not play the advantage of computer-aided design (CAD) on the other hand.
Along with the day by day universal of Computer-aided Design Technology and application, the operation such as virtual osteotomy, virtual in place, soft tissue prediction all can have been finished drilling in software environment, but rarely has the accurate and effective method setting up occluding relation under virtual environment both at home and abroad at present.Only report is the process of complete analogy model operation under software environment, and without the defect of gypsum sense of touch under adding collision detection algorithm compensation software environment.But adding of collision detection causes extend computing time, poor real, operator (doctor) cannot accept.
Along with Computer-aided Design Technology is in the widespread use of Oral and Maxillofacial Surgery, in the urgent need to the solution setting up occluding relation accurate and effective under virtual environment.
Summary of the invention
The invention provides a kind of computer-implemented method setting up teeth occluding relation, view-based access control model analysis principle, under three-dimensional visualization environment, by image and objective quantizating index intuitively, carry out assist physician and set up new occluding relation model on computers, better to instruct the surgical intervention of correction and orthognathous.
Technical scheme of the present invention is:
1. set up a computer-implemented method for teeth occluding relation, it is characterized in that, comprise the following steps:
1) gather and read the three-dimensional data model of mandibular dentition, comprising CT three-dimensional reconstruction data or tooth three-dimensional scan-data;
2) on the three-dimensional data model of denture, choose sharp nest corresponding point, mark cusp gauge point and tooth nest gauge point that on several, lower jaw is mutually corresponding respectively;
3) calculate lower jaw point cloud distance on sharp nest corresponding point vector sum, show the corresponding vector plot of sharp nest and two dimension collision detection chromatogram;
4) moving three dimension data model, under namely fixing (on) jaw, along arbitrary axis translation with rotate upper (lower) jaw under three-dimensional system of coordinate, until upper lower jaw is in a good occlusion corresponding relation;
5) real time collision detection of three-dimensional visualization is provided, calculates three-dimensional impact model;
6) to the three-dimensional impact model that three-dimensional impact detection computations goes out, with step 4) the upper mandibular dentition three-dimensional data model that obtains carries out Boolean calculation, removes interference, obtain establishing upper and lower denture to virtual occlusion model;
7) the virtual occlusion model set up is preserved and derived.
2. further, described step 1) in, described three-dimensional data is comprised being rebuild by 3-D scanning or CT data three-dimensional and obtains, the three-dimensional data of the general format that the computer aided design softwares such as STL, wrl, obj can read and edit; When reading three-dimensional data, need to keep its coordinate system constant.
3. further, described step 2) in, the quantity choosing sharp nest corresponding point is: incisor at least one; Canine tooth and bicuspid are at least two; Grind one's teeth in sleep is four.
4. further, described step 2) in, the corresponding relation of sharp nest corresponding point is: the nearly mid point of the corresponding mandibular incisors of the nearly mid point of maxillary incior; The corresponding mandibular canine cusp of eye tooth mid point far away, the nearly mid point of the corresponding lower jaw canine tooth of eye tooth cusp point; The corresponding lower jaw bicuspid tooth den of upper jaw bicuspid tongue side cusp point, corresponding lower jaw bicuspid cheek side, upper jaw bicuspid tooth den cusp point; The corresponding nearly dens in dente den of lower molar of maxillary molar tongue side nearly dens in dente cusp, the nearly dens in dente cusp in corresponding lower molar cheek side, Molars dens in dente den, the corresponding lower molar dens in dente den far away of maxillary molar tongue side dens in dente far away cusp, corresponding lower molar cheek side, maxillary molar dens in dente far away den dens in dente cusp far away.
5. further, described step 3) in, the corresponding vector plot of described sharp nest is upper jaw point den lower jaw point den one group of tri-vector projection vector on tangent plane formed between two corresponding thereto, points out by its length and direction the situation that sharp nest is corresponding.
6. further, described step 3) in, described two dimension collision detection chromatogram is the real-time statistics according to upper lower jaw point cloud distance, by calculating the distance of upper lower jaw point cloud, and the Two way chromatograms image be converted in jaw plane, be used for real-time prompting position of collision and collision the degree of depth.
7. further, described step 4) in, described translation and rotation comprise by coordinate axis translation, rotation and by any vectorial translation, rotation, and rotation center can be defined as any point in a cloud when rotating.
8. further, described step 4) in, the implementation of described translation and rotation comprises input numerical value and carrys out interactively with mouse drag object move device and realizes translation on three directions and rotation.
9. further, described step 5) in, described three-dimensional impact model is collided by upper lower jaw, i.e. the intersection of two three-dimensional datas is converted into editable tri patch data, and 3-D display.
10. further, described step 7) in, after setting up virtual occluding relation, when being preserved by model and derive, keep its coordinate system constant.
Technique effect of the present invention:
A kind of computer-implemented method setting up teeth occluding relation provided by the invention, achieve the function setting up occluding relation completely in computer virtual environment, instead of loaded down with trivial details manual operations, can under three-dimensional visualization environment, for doctor provides more directly perceived and objective reference data, by image and objective quantizating index intuitively, carry out assist physician and set up new occluding relation model on computers, to the treatment of correction and orthognathous, there is important directive significance.The occluding relation result of foundation is directly applied to follow-up virtual design by prior it is possible to, and avoids the error being obtained occluding relation by scanning.
Accompanying drawing explanation
Fig. 1 is a kind of process flow diagram setting up the computer-implemented method of teeth occluding relation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but protection content of the present invention is not limited to this.
As shown in Figure 1, be a kind of process flow diagram setting up the computer-implemented method of teeth occluding relation of the present invention.
1. set up a computer-implemented method for teeth occluding relation, comprise the following steps:
1) gather and read the three-dimensional data model of mandibular dentition, comprising CT three-dimensional reconstruction data or tooth three-dimensional scan-data;
Step 1) in, described three-dimensional data is comprised being rebuild by 3-D scanning or CT data three-dimensional and obtains, the three-dimensional data of the general format that the computer-aided design (CAD)s such as STL, wrl, obj (Computer Assisted Design, CAD) software can read and edit; When reading three-dimensional data, need to keep its coordinate system constant.
2) on the three-dimensional data model of denture, choose sharp nest corresponding point, mark cusp gauge point and tooth nest gauge point that on several, lower jaw is mutually corresponding respectively;
Step 2) in, the quantity choosing sharp nest corresponding point is: incisor at least one; Canine tooth and bicuspid are at least two; Grind one's teeth in sleep is four.The corresponding relation of point nest corresponding point is: the nearly mid point of the corresponding mandibular incisors of the nearly mid point of maxillary incior; The corresponding mandibular canine cusp of eye tooth mid point far away, the nearly mid point of the corresponding lower jaw canine tooth of eye tooth cusp point; The corresponding lower jaw bicuspid tooth den of upper jaw bicuspid tongue side cusp point, corresponding lower jaw bicuspid cheek side, upper jaw bicuspid tooth den cusp point; The corresponding nearly dens in dente den of lower molar of maxillary molar tongue side nearly dens in dente cusp, the nearly dens in dente cusp in corresponding lower molar cheek side, Molars dens in dente den, the corresponding lower molar dens in dente den far away of maxillary molar tongue side dens in dente far away cusp, corresponding lower molar cheek side, maxillary molar dens in dente far away den dens in dente cusp far away.
3) calculate lower jaw point cloud distance on sharp nest corresponding point vector sum, show the corresponding vector plot of sharp nest and two dimension collision detection chromatogram;
Step 3) in, the corresponding vector plot of described sharp nest is upper jaw point den lower jaw point den one group of tri-vector projection vector on tangent plane formed between two corresponding thereto, points out by its length and direction the situation that sharp nest is corresponding.Described collision detection chromatogram is the real-time statistics according to upper lower jaw point cloud distance, by calculating the distance of upper lower jaw point cloud, and is converted into the Two way chromatograms image in jaw plane, be used for real-time prompting position of collision and collision the degree of depth.
4) moving three dimension data model, under namely fixing (on) jaw, along arbitrary axis translation with rotate upper (lower) jaw under three-dimensional system of coordinate, until upper lower jaw is in a good occlusion corresponding relation; Often complete step translation or a rotation, need to re-start two dimension collision and detect and the corresponding vectorial calculating of sharp nest;
Step 4) in, described translation and rotation comprise by coordinate axis translation, rotation and by any vectorial translation, rotation, and rotation center can be defined as any point in a cloud when rotating.The implementation of described translation and rotation comprises input numerical value and carrys out interactively with mouse drag object move device and realizes translation on three directions and rotation.
5) provide three-dimensional visual real time collision detection, calculate three-dimensional impact model;
Step 5) in, described three-dimensional impact model is collided by upper lower jaw, i.e. the intersection of two three-dimensional datas is converted into editable tri patch data, and 3-D display.
6) to the three-dimensional impact model data that three-dimensional impact detection computations goes out, with step 4) the upper mandibular dentition three-dimensional modeling data that obtains carries out Boolean calculation, remove interference, realize automatically adjusting jaw function, obtain establishing upper and lower denture to virtual occlusion model.
7) the virtual occlusion model obtained is preserved and derived.
Step 7) in, after setting up virtual occluding relation, when being preserved by model and derive, keep its coordinate system constant.
Herein means bright, more than describe and contribute to those skilled in the art and understand the invention, but and the protection domain of unrestricted the invention.Any enforcement improving the equivalent replacement described above, modification and/or delete numerous conforming to the principle of simplicity and carry out not departing from the invention flesh and blood, all falls into the protection domain of the invention.
Claims (10)
1. set up a computer-implemented method for teeth occluding relation, it is characterized in that, comprise the following steps:
1) gather and read the three-dimensional data model of mandibular dentition, comprising CT three-dimensional reconstruction data or tooth three-dimensional scan-data;
2) on the three-dimensional data model of denture, choose sharp nest corresponding point, mark cusp gauge point and tooth nest gauge point that on several, lower jaw is mutually corresponding respectively;
3) calculate lower jaw point cloud distance on sharp nest corresponding point vector sum, show the corresponding vector plot of sharp nest and two dimension collision detection chromatogram;
4) moving three dimension data model, under namely fixing (on) jaw, along arbitrary axis translation with rotate upper (lower) jaw under three-dimensional system of coordinate, until upper lower jaw is in a good occlusion corresponding relation;
5) provide three-dimensional visual real time collision detection, calculate three-dimensional impact model;
6) to the three-dimensional impact model that three-dimensional impact detection computations goes out, with step 4) the upper mandibular dentition three-dimensional data model that obtains carries out Boolean calculation, removes interference, obtain establishing upper and lower denture to virtual occlusion model;
7) the virtual occlusion model set up is preserved and derived.
2. the computer-implemented method setting up teeth occluding relation according to claim 1, it is characterized in that, described step 1) in, described three-dimensional data is comprised being rebuild by 3-D scanning or CT data three-dimensional and obtains, the three-dimensional data of the general format that the computer aided design softwares such as STL, wrl, obj can read and edit; When reading three-dimensional data, need to keep its coordinate system constant.
3. the computer-implemented method setting up teeth occluding relation according to claim 1, is characterized in that, described step 2) in, the quantity choosing sharp nest corresponding point is: incisor at least one; Canine tooth and bicuspid are at least two; Grind one's teeth in sleep is four.
4. the computer-implemented method setting up teeth occluding relation according to claim 3, is characterized in that, further, and described step 2) in, the corresponding relation of sharp nest corresponding point is: the nearly mid point of the corresponding mandibular incisors of the nearly mid point of maxillary incior; The corresponding mandibular canine cusp of eye tooth mid point far away, the nearly mid point of the corresponding lower jaw canine tooth of eye tooth cusp point; The corresponding lower jaw bicuspid tooth den of upper jaw bicuspid tongue side cusp point, corresponding lower jaw bicuspid cheek side, upper jaw bicuspid tooth den cusp point; The corresponding nearly dens in dente den of lower molar of maxillary molar tongue side nearly dens in dente cusp, the nearly dens in dente cusp in corresponding lower molar cheek side, Molars dens in dente den, the corresponding lower molar dens in dente den far away of maxillary molar tongue side dens in dente far away cusp, corresponding lower molar cheek side, maxillary molar dens in dente far away den dens in dente cusp far away.
5. the computer-implemented method setting up teeth occluding relation according to claim 1, it is characterized in that, further, described step 3) in, the corresponding vector plot of described sharp nest is upper jaw point den lower jaw point den one group of tri-vector projection vector on tangent plane formed between two corresponding thereto, points out by its length and direction the situation that sharp nest is corresponding.
6. the computer-implemented method setting up teeth occluding relation according to claim 1, it is characterized in that, described step 3) in, described two dimension collision detection chromatogram is the real-time statistics according to upper lower jaw point cloud distance, by calculating the distance of upper lower jaw point cloud, and the Two way chromatograms image be converted in jaw plane, be used for real-time prompting position of collision and collision the degree of depth.
7. the computer-implemented method setting up teeth occluding relation according to claim 1, it is characterized in that, further, described step 4) in, described translation and rotation comprise by coordinate axis translation, rotation and by any vectorial translation, rotation, and rotation center can be defined as any point in a cloud when rotating.
8. the computer-implemented method setting up teeth occluding relation according to claim 7, it is characterized in that, described step 4) in, the implementation of described translation and rotation comprises input numerical value and carrys out interactively with mouse drag object move device and realizes translation on three directions and rotation.
9. the computer-implemented method setting up teeth occluding relation according to claim 1, it is characterized in that, further, described step 5) in, described three-dimensional impact model is collided by upper lower jaw, the i.e. intersection of two three-dimensional datas, is converted into editable tri patch data, and 3-D display.
10. the computer-implemented method setting up teeth occluding relation according to claim 1, is characterized in that, further, and described step 7) in, after setting up virtual occluding relation, when being preserved by model and derive, keep its coordinate system constant.
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| CN105893739A (en) * | 2016-03-28 | 2016-08-24 | 杭州美齐科技有限公司 | Collision detection algorithm for calculating occlusion areas of upper and lower jaws |
| 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 |
| CN108403234A (en) * | 2018-02-26 | 2018-08-17 | 北京正齐口腔医疗技术有限公司 | Arrange tooth method and device |
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| CN110164558A (en) * | 2019-05-27 | 2019-08-23 | 上海爱圣美科技有限公司 | A kind of method of tooth model parametrization |
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| CN112022409A (en) * | 2019-06-04 | 2020-12-04 | 先临三维科技股份有限公司 | Occlusion method and device for tooth scanning data, storage medium and processor |
| 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 |
| CN114126535A (en) * | 2019-07-18 | 2022-03-01 | 3M创新有限公司 | Virtual joint motion 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 |
| CN112932695A (en) * | 2019-12-10 | 2021-06-11 | 杭州朝厚信息科技有限公司 | Computer-implemented method for judging adjacent surface stripping time |
| 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 |
| CN115300138A (en) * | 2020-03-12 | 2022-11-08 | 北京大学口腔医学院 | Computer aided design method for deciding orthodontic orthognathic combined treatment operation time |
| CN111292320A (en) * | 2020-03-12 | 2020-06-16 | 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 |
| CN111973309B (en) * | 2020-07-24 | 2022-05-17 | 上海交通大学医学院附属第九人民医院 | Manufacturing method of blending guide plate |
| CN111973309A (en) * | 2020-07-24 | 2020-11-24 | 上海交通大学医学院附属第九人民医院 | Method for manufacturing blending guide plate |
| CN112184910A (en) * | 2020-09-28 | 2021-01-05 | 上海正雅齿科科技股份有限公司 | Dental model occlusion relation establishing method and system |
| CN112184910B (en) * | 2020-09-28 | 2023-11-07 | 正雅齿科科技(上海)有限公司 | Dental model occlusion relation establishment method and system |
| CN113284385A (en) * | 2021-05-08 | 2021-08-20 | 中山大学附属口腔医院 | Teaching platform setting method, device, equipment and computer storage medium |
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