Accuratezza e precisione di un nuovo sistema di chirurgia guidata: studio clinico multicentrico [Multicenter clinical study on accuracy and precision of a new guided surgery system]

Objectives The aim of this study is to evaluate the accuracy of a new guided surgery system. Materials and methods Twenty-six patients were treated in 8 centers with a total 116 implants placed. The surgical guides were bone supported, mucosal or teeth supported. At the end of the surgical phase, a post-op CT scan was taken to evaluate the discrepancies between the virtual and the clinical implant position. Results The mean values regarding the 3D implant position are in line with the mean values reported in the literature. Bone supported and mucosal supported guides are more precise than dental or dental-mucosal supported guides, however, the differences are not statistically significant. Discrepancies at the implant apex, at platform level and at the angle between virtual and clinical position were evaluated by superimposing a pre-op CT scan to a post-op CT scan. Conclusions The accuracy of the guided surgery system used is in line with the data of the literature. A good diagnostic phase is recommended and it is very important to plan the implant position with a safety distance from the anatomical structures of at least 2 mm. In clinical cases of immediate loading it is recommended to reline a provisional prosthesis to compensate the discrepancies between the virtual and the clinical implant position.