Intraoral scanner (IOS) accuracy is commonly evaluated using full-arch surface comparison,
which fails to take into consideration the starting position of the scanning (scan
origin). Previously a novel method was developed, which takes into account the scan
origin and calculates the deviation of predefined identical points between references
and test models. This method may reveal the error caused by stitching individual images
during intraoral scan. This study aimed to validate the novel method by comparing
the trueness of seven IOSs (Element 1, Element 2, Emerald, Omnicam, Planscan, Trios
3, CS 3600) to a physical impression digitized by laboratory scanner which lacks linear
stitching problems.
