Evaluation of the quality of three-dimensional data acquired by using two kinds of structure light intra-oral scanner to scan the crown preparation model
10.3760/cma.j.issn.1002-0098.2016.07.011
- VernacularTitle:两种结构光口内三维扫描仪获取单冠预备体数据质量的模型评价
- Author:
Xinyue ZHANG
1
;
Hong LI
;
Yijiao ZHAO
;
Yong WANG
;
Yuchun SUN
Author Information
1. 100081,北京大学口腔医学院·口腔医院口腔医学数字化研究中心口腔修复教研室 口腔数字化医疗技术和材料国家工程实验室 卫生部口腔医学计算机应用工程技术研究中心口腔数字医学北京市重点实验室
- Keywords:
Imaging,three-dimensional;
Dental models;
Direct digital impression;
Intra-oral scanning
- From:
Chinese Journal of Stomatology
2016;51(7):432-436
- CountryChina
- Language:Chinese
-
Abstract:
Objective To quantitatively evaluate the quality and accuracy of three-dimensional (3D) data acquired by using two kinds of structure intra-oral scanner to scan the typical teeth crown preparations.Methods Eight typical teeth crown preparations model were scanned 3 times with two kinds of structured light intra-oral scanner(A,B),as test group.A high precision model scanner were used to scan the model as true value group.The data above the cervical margin was extracted.The indexes of quality including non-manifold edges,the self-intersections,highly-creased edges,spikes,small components,small tunnels,small holes and the anount of triangles were measured with the tool of mesh doctor in Geomagic studio 2012.The scanned data of test group were aligned to the data of true value group.3D deviations of the test group compared with true value group were measured for each scanned point,each preparation and each group.Independent-samples Mann-Whitney U test was applied to analyze 3D deviations for each scanned point of A and B group.Correlation analysis was applied to index values and 3D deviation values.Results The total number of spikes in A group was 96,and that in B group and true value group were 5 and 0 respectively.Trueness:A group 8.0 (8.3) μm,B group 9.5 (11.5) μm(P＞0.05).Correlation analysis of the number of spikes with data precision of A group was r=0.46.Conclusions In the study,the qulity of the scanner B is better than scanner A,the difference of accuracy is not statistically significant.There is correlation between quality and data precision of the data scanned with scanner A.
