Objectives: This study was made to determine the accuracy of 3 intraoral scanners (IOS) on different Endocrown preparations.Methods: Four Endocrown preparations with two internal angulations (6° & 10°) and two depths (3mm & 5 mm) were made on an acrylic typodont.Reference scans were taken with a reference scanner (InEos X5) and saved in a STL format then each IOS (Trios, Omnicam, and My crown) sca...