Comparative study on the accuracy of four digital methods by linear and volumetric analysis of dental material impressions – Presented by Stefano Pagano, University of Perugia, at the 3D Dental Printing Conference, which takes place on Jan 31, 2017 at MECC Maastricht in The Netherlands.
Objective: to evaluate accuracy and precision of different 3D scanning systems, both desktop ones and intra-oral, compared with traditional imprint using linear and volumetric techniques. A dental tooth was selected in order to obtain a referring zirconium model. A coordinate measurement machine (CMM) was used to acquire a high accuracy point clouds of the master model. Three desktop scanners (D1, D2, D3) and one intraoral scanner (I) were compared by using two commercial softwares (Geomagic and 3Matic) and a custom developed algorithm (Matlab).Results: The mean values calculated with Geomagic software range from 0.0286 (D1) to 0.1654 mm (I); those calculated with 3-matic software range from -0.0396 (D1) to 0.1303 mm (I). The mean volumes calculated with MATLAB range from 1.4156e-04 (D1) to 4.9597e-04 mm3 (D2). The volumetric technique seems to be the most accurate to evaluate the accuracy of digital impressions. Among the different scanners, D1 scanner and I scanner have a low probability of errors respect to D2 and D3 scanners.
About Stefano Pagano
Aggregate Professor University of Perugia, Subject of Dental Materials. Director: Prof Stefano Cianetti
Chair Prof. Stefano Cianetti, , S. Andrea delle Fratte, 06156 Perugia, Italy