Related Experiment Video
Updated: Sep 17, 2025
Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
In vivo study of intraoral scanner trueness in partial edentulism
Mengxin Yao1,2, Ning Gan1, Jiajun Ming1,3
1Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Shanghai, 200011, China.
Abstract:
The purpose of this study was to evaluate the trueness of complete-arch intraoral scanning of maxillary partially edentulous patients. Sixty-four patients with partially edentulous upper jaws were recruited. The intraoral digital impressions were obtained by Trios 3 scanner. Conventional impression procedure was performed with polyether silicone rubber as reference models. The trueness of intraoral digital impressions for dentition, edentulous area, and palate was calculated by aligning digital scanning data to conventional impression data using Geomagic Studio 2013. Data were classified according to arch width, palatal vault height, Kennedy classification, as well as number and distribution of missing teeth. There were significant differences among the average absolute deviations of dentition (61.9 ± 36.8 μm), palate (115.9 ± 44.3 μm), and edentulous area (63.0 ± 37.1 μm) (P < 0.001). There was no significant effect of arch width, Kennedy Classification, or number and distribution of missing teeth on the trueness of digital impressions (P > 0.05), while the intraoral scanning trueness of edentulous area tended to decrease in patients with higher palatal vault (P = 0.003). Thus, it is feasible to use intraoral scanner to obtain the digital impressions for the fabrication of RPDs. The trueness of patients with higher palatal vault needs more attention and verification.
