Abstract: Impression techniques using digital technology seemed to be studied with the accuracy planning to initiate acceptable prosthetic results in implant dentistry. In order to overcome these misfit, digital impression by means of an intra-oral scanner may assist. The purpose of this study was conducted to assess the efficacy of using digital impression technique compared to conventional technique
Material and Methods: 8 patients were examined with a total of 22 implants placed, each patient had undergone two impression techniques: a digital impression: intraoral scan body, and a conventional impression: open tray impression, the total deviation between the two impression techniques was measured. This was done by scanning the scan body in patient mouth in group I and digitalizing the conventional open tray impression by scanning the scan body on the cast produced by the open tray in group 2. The scan body was replaced on the software (Exocad software) with custom made abutment and the deviation between the two groups was measured using (Geomagic Control X; 3D systems) GOM inspection software
Results: Total deviation between groups, the open tray conventional impression was compared to hypothesized reference digital impression and were calculated using GOM inspect software. The total deviation was statistically significantly different among the studied groups.
Conclusions: In partially edentulous patients, intraoral oral scanning using intra oral scan bodies improves over all accuracy, than conventional open tray impression technique.