Trueness evaluation of latest generation intraoral scanners on complete arch implant impressions.

Abstract

To evaluate the trueness of five intraoral scanners for a fully edentulous model with seven implants. The study model was created from gypsum with seven implant analogs that were placed with 2-mm gingival height and 0-degree angle at tooth sites 47, 45, 43, 31, 33, 35, and 37. The study model was scanned 10 times (n = 10) with five intraoral scanners (CS3600, Emerald S, Primescan, TRIOS 3, TRIOS 4). The study model was digitized with a high-resolution industrial desktop scanner, and the data were imported into a software (Geomagic Studio 2012) as the reference model. The trueness assessment was made digitally with superimposition using the software. Linear measurements were calculated by the differences between the centers of the scan bodies on the study vs the reference model. Volumetric deviations were calculated with root mean square values. Data obtained in the study were analyzed statistically. One-way analysis of variance and Tukey tests were used to evaluate significant interactions. A value of P < .05 was accepted as statistically significant. In linear measurements, TRIOS 4 showed the best trueness results, followed by TRIOS 3, Emerald S, Primescan, and CS3600. TRIOS 4 showed statistically truer results than CS3600 (P = .029). However, no statistically significant difference was found between groups in volumetric measurements (P < .05). All of the intraoral scanners used in the study showed favorable deviation values in an edentulous model with seven implants. TRIOS 4 showed the best trueness values. The latest generation of intraoral scanners can be used in full-arch implant impressions.