Evaluation with a coordinate measuring machine of dimensional accuracy of the Abutment Duplication Technique in cement-retained implant restoration

Purpose : To evaluate the effectiveness and accuracy of a proposed duplication technique in terms of one- and three-dimensional discrepancies between an original abutment and polyurethane duplicates obtained through a conventional workflow in single-implant rehabilitation. Materials and Methods : A titanium shoulder-less abutment was chosen for a single-implant cemented rehabilitation. The master cast was made using a plastic-based die system, and the implant portion was separated. The implant section was consecutively duplicated eight times using a manual technique with polyvinyl siloxane and unfilled polyurethane resin as impression and die materials. The duplicates were analyzed with a coordinate-measuring machine (SmartScope Flash200, OGP): one- and three-dimensional discrepancies were determined for each duplicate on 20 analysis points (A-T) located on