Trueness of High-Resolution Function in Intraoral Scanners: an in Vitro Study

Description :

CAD-CAM technology has revolutionized dental workflows by facilitating digital impressions through IOS. Accurately capturing tooth preparations and finish lines, especially in subgingival areas, are essential for the long-term success of dental restorations. Recent advancements in IOS technology have introduced adjustable scanning parameters, such as HR modes, designed to enhance the level of detail captured in digital impressions. However, there is limited consensus in the literature regarding the actual impact of scan resolution settings on the trueness of digital impressions, especially across different IOS systems. Trueness, defined as the closeness of a scan to the true geometry of the object, is a crucial metric in evaluating digital impression accuracy (1). This in vitro study will aim to evaluate the trueness of digital impressions obtained at two different resolution settings, SD and HR, compared to the reference desktop scan, using various IOS devices. A standardized typodont model featuring a posterior single-tooth preparation will be cast in type IV gypsum and used as the scanning subject. Scans will be performed under controlled conditions and the resulting digital impressions will be compared to a reference model obtained via desktop scanner, Ceramill Map 600+ (Amann Girrbach, Koblach, Austria). Three-dimensional deviation analyses will be performed using specialized inspection software, Geomagic Control X software (3D Systems, Rock Hill, SC, USA) to quantify the discrepancies between the test scans and the reference model. The primary objective of the study is to determine whether HR scan setting significantly improve the trueness of the 3D impressions among the different IOS

Titulaire :
HARDAN Louis

Contact USJ :
louis.hardan@usj.edu.lb

Chercheur(s) :
Pr Louis HARDAN

Projet présenté au CR, le : 01/06/2025

Projet achevé auprès du CR : 30/04/2026