Accuracy and Precision Evaluation of International Standard Spherical Model by Digital Dental Scanners.

Hong Xin Cai,Jie Liu,Heng Bo Jiang,Yujie Jiang,Qi Jia,Haoyu Shi,Haotian Gong,Eui-Seok Lee,Chunxu Chen,Jingnan Xue,Ying Zhao

doi:10.1155/2020/1714642

Abstract

With the popularization of digital technology and the exposure of traditional technology's defects, computer-aided design and computer-aided manufacturing (CAD/CAM) has been widely used in the field of dentistry. And the accuracy of the scanning system determines the ultimate accuracy of the prosthesis, which is a very important part of CAD/CAM, so we decided to evaluate the accuracy of the intraoral and extraoral scanners. In this study, we selected the sphere model as the scanning object and obtained the final result through data analysis and 3D fitting. In terms of trueness and precision, the scanner of SHINING was significantly different from that of others; however, there was no significant difference between TRIOS and CEREC. SHINING showed the lowest level of accuracy, with CEREC slightly lower than TRIOS. The sphere model has also been proven to be scanned successfully.

Highlights

With the emergence of digitalization, computer-aided design and computer-aided manufacturing (CAD/CAM) systems [1] have found an increasingly wide utilization in the field of prosthodontics on account of its considerable strengths [2]
The results show that there is a larger error of SHINING compared with other scanners, and a large area is lower than the control group
We find that there is no significant difference between CEREC and TRIOS, but the absolute mean precision values of the CEREC are significantly lower than TRIOS through statistical analysis

Summary

Introduction

With the emergence of digitalization, CAD/CAM systems [1] have found an increasingly wide utilization in the field of prosthodontics on account of its considerable strengths [2]. Given the fact that the traditional prostheses gradually fail to meet the needs of patients, the use of intraoral [3] and extraoral scanners in dentistry is becoming more and more common [4, 5]. By using the specific and intuitive model presented from intraoral and extraoral scanners [6,7,8,9], we can immediately obtain detailed information of the patient’s oral cavity and its digital files. The extraoral scanner scans the impression model, and the intraoral scanner directly scans the patient’s oral cavity [7]. Compared to the traditional technology, the scanning technology is undoubtedly time-saving and efficient [11, 12]

Methods

Results

Conclusion