Comparative evaluation of the virtual planned position and actual position of implant in mandibular posterior region using a DIOnavi system

Abstract

Statement of problem: Implant placement in the mandibular posterior regions is often challenging because of limited space and insufficient accessibility. Purpose: The purpose of this clinical study was to investigate the accuracy of computer-guided surgery with a long drill key to place implants in the mandibular posterior regions. Material and methods: Computer-guided implant surgery was performed for 15 participants requiring implants in mandibular posterior region. This procedure involved using 6mm long drill key to guide the 2.0 mm diameter drill. The planned and placed implant position were scanned and superimposed to evaluate the accuracy of the guide. Results: A total of 15 implants were place where the mean linear deviation was 0.4 mm (range, 0.15 to 1.30 mm) for the implant shoulder and 0.45 mm (range, 0 to 1.48 mm) for the implant apex. The mean angular deviation was 1.4 degrees (0.38 to 4.89 degrees). The mean depth deviation was 0.61 mm (0.10 to 1.85 mm). The differences between virtually planned implants and actual positions of the implants were statistically significant for all variables (P<.05).