A novel reference model for dental scanning system evaluation: Analysis of fve intraoral scanners

Abstract

PURPOSE. The aim of thisi n vitro study was to investigate the accuracy (true-ness and precision) of fve intraoral scanners (IOS) using a novel reference model for standardized performance evaluation. MATERIALS AND METHODS. Five IOSs (Medit i500, Omnicam, Primescan, Trios 3, Trios 4) were used to digitize the reference model, which represented a simplifed full-arch situation with four abutment teeth. Each IOS was used fve times by an experienced operator, resulting in 25 STL (Standard Tessellation Language) fles. STL data were imported into 3D software (Final Surface®) and examined for interand intra-group analyses. Deviations in the parameter matching error were calculated. ANOVA F-test and Kru-skal-Wallis test were applied for inter-group comparisons (α = .05); and the coef-fcient of variation (CV) was calculated for intra-group comparisons (in % ± SD). RESULTS. Primescan (matching error value: 0.015), Trios 3 (0.016), and Trios 4 (0.018) revealed comparable results with signifcantly higher accuracy compared to Medit i500 (0.035) and Omnicam (0.028) P (