Marginal and Internal Fit of Ceramic Prostheses Fabricated from Different Chairside CAD/CAM Systems: An In Vitro Study

The purpose of this in vitro study was to evaluate marginal and internal fits ceramic crowns fabricated with chairside computer-aided design manufacturing (CAD/CAM) systems. An experimental model based on ISO 12836:2015 digitally scanned different intraoral scanners (Omnicam (CEREC), EZIS PO (DDS), CS3500 (Carestream)). Ceramic were using the CAD/CAM process recommended by each system (CEREC, EZIS, Carestream systems; N = 15). 3-dimensional (3D) fit crown measured a 3D inspection software (Geomagic control X). Differences among systems various measurements evaluated Kruskal–Wallis test. Statistically significant differences validated pairwise comparisons (? 0.05). Occlusal gaps CEREC, groups 113.0, 161.3, 438.2 µm, respectively (p < 0.001). axial 83.4, 78.0, 107.9 respectively. 77.8, 99.3, 60.6 respectively, whole 85.9, 107.3, 214.0 Significant observed compared other two terms gap sizes. CEREC showed no four regions. However, did show statistically difference All three judged be capable fabricating clinically acceptable prostheses, because gap, which is most important factor recorded below 100 µm all