Affiliation:
1. Department of Oral and Maxillofacial Surgery Peking University School and Hospital of Stomatology Beijing China
2. National Center of Stomatology, National Center for Stomatology National Clinical Research Center for Oral Diseases National Engineering Research Center of Oral Biomaterials and Digital Medical Devices Beijing Key Laboratory of Digital Stomatology Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health National Medical Products Administration Key Laboratory for Dental Materials Beijing China
3. Department of Prosthodontics Peking University School and Hospital of Stomatology Beijing China
Abstract
AbstractObjectiveThis study aimed to evaluate the differences in the accuracy of immediate intraoral, immediate extraoral, and delayed dental implant placement with surgical guides (static computer‐aided implant surgery) in patients treated with mandibular reconstruction.MethodsThis was a retrospective study. The patients were divided into three groups: immediate intraoral placement (IIO), immediate extraoral placement (IEO), and delayed placement (DEL). Four variables were used to compare the planned and actual implant positions: angular deviation, three‐dimensional (3D) deviation at the entry point of the implant, 3D deviation at the apical point of the implant, and depth deviation.ResultsThe angular deviation was significantly higher in the IIO group than in the IEO (p < .05) and DEL (p < .05) groups. The 3D deviation at the entry point was significantly higher in the IIO group than in the IEO (p < .05) and DEL (p < .01) groups. The 3D deviation at the apical point was significantly higher in the IIO group than in the IEO (p < .01) and DEL (p < .01) groups. The depth deviation was significantly higher in the IIO group than in the IEO (p < .05) and DEL (p < .05) groups. There was no statistical difference between the IEO and DEL group in angular and 3D deviation.ConclusionWith surgical guides, among the different approaches for implant placement, delayed implant placement remains the most accurate approach for patients treated with mandibular reconstruction.