ĐỘ CHÍNH XÁC CỦA PHẪU THUẬT ĐẶT IMPLANT SỬ DỤNG MÁNG HƯỚNG DẪN PHẪU THUẬT VÀ MŨI KHOAN TREPHINE: NGHIÊN CỨU IN-VITRO

Abstract

Objectives: The present  study aims to evaluate the accuracy of fully guided implant placement using trephine burs and a Trephine Key instrument, and to compare the accuracy between two distinct drilling protocols employing trephine burs of different diameters. Materials and Methods: An in-vitro study was conducted on dental models. A total of 40 implants were allocated into two experimental groups based on the surgical protocol: group 1 (n=20) utilized a trephine bur with a 2.5 mm inner diameter, and group 2 (n=20) utilized a trephine bur with a 2.9 mm inner diameter. Accuracy was evaluated by comparing the actual and planned implant positions through angular deviation, deviation at the implant platform and apex, and vertical deviation at the platform and apex. Results: The results showed that the mean angular deviation was 1.74 ± 0.78 degrees. The mean deviations at the implant platform and apex were 0.60 ± 0.13 mm and 0.73 ± 0.10 mm, respectively; while the mean vertical deviations at the platform and apex were 0.35 ± 0.05 mm and 0.39 ± 0.05 mm, respectively. There was no statistically significant difference (p > 0.05) in accuracy between the implants of Group 1 and Group 2. Conclusion: Within the limitations of this in-vitro study, the findings demonstrate that the fully guided implant placement protocol utilizing trephine burs and the Trephine Key instrument is a highly accurate procedure, suggesting its viability for clinical application. Furthermore, the results indicate that the selection of a larger diameter trephine (2.9 mm) to procure a larger bone core does not adversely affect the final implant placement accuracy when compared to the protocol using a smaller diameter bur (2.5 mm).