Influence of titanium dioxide and composite on the accuracy of an intraoral scanner for bilateral upper posterior edentulous jaw (Kennedy class I) scanning: An in vitro study.

Objectives: The accuracy of 3-dimensional images produced by the intraoral scanner (IOS) is affected by scanning-aid materials. This in vitro study aimed to elucidate the influence of scanning-aid materials on the accuracy (trueness and precision) of digital scanning on the bilateral upper posterior edentulous jaw (Kennedy class I).

Methods: The asymmetrical bilateral upper posterior edentulous model (reference model) was generated using a 3D printer with three groups (application of TiO powder - composite and no-treatment control).