In Reliability and Validity of T-scan and 3D Intraoral Scanning for Measuring the Occlusal Contact Area, the researchers sough to determine the reliability of T-scan and 3D intraoral scan techniques for assessing the occlusal contact area (OCA), compared to occlusal registration and also to assess the validity of the techniques.
They concluded T-Scan is a reliable method for measuring the OCA, but the 3D surface scan is not. Occlusal registration showed a high validity.