Evaluation the Accuracy of Three-Dimensional virtual Surgical Planning for Maxillary Positioning in Orthognathic Surgery: Prospective Clinical Study

Background: Dento-facial distortions was known as a specific type of deformities which affect jaws and dentition. The incidence of dentofacial deformaties is rely on genetic and sociofactors. Orthognathic surgeries purposed to rectify dento-facial distortion, functional and aesthetic issues. The success was no only depend on the orthogathic surgeries, but although; accuracy and detailes management plan. Therefore; this study aims to evaluate the accuracy of 3D virtual surgical planning for maxillary positioning and orientation in orthognathic surgery via comparison of preoperative planning and postoperative actual results. Materials and Methods: In this prospective clinical study was enrolled 11 patients diagnosed with dentofacial abnormalities of the jaws cannot be managed with conventional orthodontics techniques underwent orthognathic surgery was conducted at outpatient clinic of the department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ain Shams University. Results: The results showed non statistically significant difference between the virtual plan and the actual postsurgical outcome. Only minor inaccuracies were present; none of these discrepancies affected the clinical result for the sample included in this study. The inter-observer reliability was assessed by weighted Kappa, which was 0.947, indicating almost perfect agreement between the two assessors. Assessment of the points distances to the FHP in the virtually plan 3D model (mean=45.72mm, SD=8.49mm) in the comparison to the postoperative 3D model (mean=45.80mm, SD=8.54mm) showed a non-significant statistical difference where P=0.186. Assessment of the points distances to the MSP in the virtually plan 3D model (mean=17.09mm, SD=8.54mm) in the comparison to the postoperative 3D model (mean=17.10mm, SD=8.49mm) showed a nonsignificant statistical difference where P=0.877. Assessment of the points distances to the CP in the virtually plan 3D model (mean=55.85mm, SD=12.39mm) in the comparison to the postoperative 3D model (mean=55.85mm, SD=12.36mm) showed a non-significant statistical difference where P=0.960. Conclusion: No significant differences between 3D virtual surgical planning for maxillary positioning and orientation and postoperative 3D model. 3D virtual surgical planning was highly accurate in dentofacial abnormalities