Accuracy of the dentofacial models using extraoral scan body and perioral scan including dentition

Abstract

We investigated the accuracy of dentofacial models used in digital dental treatment, which are referred to as virtual patients. In Experiment 1, we investigated the integration method for the dentition and face of the reference virtual patient (RVP) used in Experiment 2, and decided to use the labial surface of the maxillary anterior teeth. In Experiment 2, we compared the accuracy of the dentofacial models integrated using three different methods. An RVP was created by registering the maxillary dentition model and facial model using the labial surface of the maxillary anterior teeth. The maxillary dentition model and facial model were integrated using the extraoral scan body as the integration interface to create a study virtual patient (SVP), Face Hunter study virtual patient (FH-S), and Heges study virtual patient (HE-S) using the dental face scanner (Face Hunter, FH) and a 3D scanning application (Heges, HE). In HE, an SVP was also created using a perioral scan including dentition as the integration interface (HE-P). Registration was performed for the RVP and the three types of SVP. As indicators of the accuracy of the dentofacial model, we measured the deviation distance of the center of gravity of the maxillary dentition model, angular deviation of the frontal cant of the maxillary central incisor edge line, and angular deviation of the inclination of the maxillary dentition reference plane. We found that FH-S showed clinically acceptable accuracy. (J Osaka Dent Univ 2025; 59: 157-171)