EVALUATION OF COMPUTER ASSISTED DESIGN COMPUTER ASSISTED MANUFACTUREING (CAD/CAM) OSTEOTOMY GUIDE IN BILATERAL MANDIBULAR SAGITTAL SPLIT OSTEOTOMY (A RANDOMIZED CONTROLLED CLINICAL TRIAL)

INTRODUCTION: The introduction of CAD/CAM technology in orthognathic surgery planning has facilitated the procedure and enabled more predictable results. This study was designed to introduce and evaluate the clinical use of a CAD/CAM surgical guide for bilateral sagittal split osteotomy (BSSO) in the correction of dentofacial deformity cases with skeletal class 2 or 3. AIM OF THE STUDY: To evaluate the efficiency of guided osteotomy in orthognathic surgery. Materials and Methods: This study was conducted on 20 patients who underwent bilateral sagittal osteotomy (BSO) procedures. Ten patients (the control group) were treated with the conventional method, without an osteotomy guide. The other 10 patients (the study group) were treated with a CAD/CAM bone-borne guide. Postoperative patient evaluation was performed clinically by comparing the operation time post operative pain and sensory nerve involvement at 1 week, 2 weeks, and 3 months. Radiographic evaluation was performed by computed tomography (CT) at 1 month postoperatively. RESULTS: The surgical outcome revealed the satisfactory correction of their skeletal deformity. The study group showed significantly better results than control group concerning operation time, Visual Analogue Scale, and sensory nerve involvement (p ≤ 0.05.) CONCLUSION: Within the limitations of this study, it can be considered that CAD /CAM osteotomy guide for BSSO is superior to non-guided BSSO regarding the operation time and sensory nerve involvement.