Hasan Alkumru
University of Western Ontario, Canada
Title: Accuracy of an Intra-oral Digital versus a Conventional Implant Impression Approach: A 3-Dimensional Comparative Analysis
Biography
Biography: Hasan Alkumru
Abstract
Scanning abutments allow clinicians to use digital intra-oral scanners to produce casts on which to fabricate implant-supported prostheses. The purpose of this study was to assess the accuracy of a digital impression approach and to compare it to a conventional impression technique. A simulated patient was fabricated with implants placed in posterior edentulous segments. Digital implant impressions were taken using an intra-oral scanner with scanbodies and conventional implant impressions were taken using an open-tray technique. 3-dimensional analysis and comparison of implant location on resultant working casts was performed using a laser scanner. A statistically significant difference between the two groups was found, with average 3-dimensional error of implant positioning of 116μm and 56μm for the digital group and conventional groups, respectively (p=0.01). Within the limitations of this study, the digital impression technique was less accurate than the conventional impression technique and did not produce working casts with clinically acceptable accuracy.