Evaluation of the effect of different core substrates on the accuracy of intraoral scanners.

Background: The aim of this study was to determine if different types of core substrates have any effect on the trueness and precision of digital intraoral impressions.

Material And Methods: A customized typodont with four similar cores of natural dentine, composite, metal (Ni-Cr), and zirconia in the position of premolars was fabricated. The study model was scanned five times with two types of intraoral scanners (Carestream 3600 and 3Shape Trios 3), and a reference standard scan was obtained using a laboratory scanner (3shape D1000).