A New Surgical Guide for Implant Placement in Complete Edentulism

Abstract: Objectives: The goal of an implant-based reconstruction is obtaining adequate aesthetic and function. In order to reduce post-treatment complications, Ideal implant placement is necessary. The aim of this study was designing and fabricating a surgical guide for accurate positioning and angulation of dental implants in completely edentulous mandibular models and evaluate its effectiveness. Methods: The Designed surgical guide has the following components: the main body, working cylinder, and centralizer. the centralizer pin was placed in a hole created at the midline. The device rotates around the centralizer pin to be transferred to the other parts of the jaw. The cylinder has two holes on the lateral sides, corresponding with the implant surgical drill diameter, to create the guiding path. drilling through the guiding path is possible after the adjustments. With the aid of the surgical guide, 16 dental implants were placed in two completely edentulous mandibular models. Afterwards, CBCT DICOM images were captured and analyzed by NNT Viewer software. Implant angle Deviations and distance from the planned angulation/position were compared. One-sample t-test was used for data analysis (at P<0.05 level of significance) Results: The mean angular deviation between the planned and placed implants was 3.31±1.2° and 0.97±0.56° for 0° (angulation relative to the vertical index at the midline) and 15° implants, respectively. The mean linear deviation between the planned and placed implants was 1.00±0.75 mm. Despite the differences being significant (P<0.05), they were clinically acceptable. Conclusions: The new designed surgical guide was efficient with little angular and linear deviation in the placed implants compared to the planned angulations/positions.