2D Evaluation of Condylar Vertical Positional Changes and Stability after Bilateral Sagittal Split Osteotomy

Introduction: The purpose of this study was to evaluate the condylar vertical positional changes and stability after the bilateral sagittal split osteotomy (BSSO) setback procedure for class III malocclusions. Materials and methods: This was a retrospective study comprising lateral cephalograms of 11 patients with 8 males and 3 females who had undergone BSSO, without additional surgery. Manual superimposition was performed with the Frankfurt horizontal plane as a reference. Condylar vertical, linear, and angular positional changes, and chin position were considered. To compare pre- and postsurgical statistics paired t test was used. Significance was set at P-value <0.05. Results: Two angular and three linear parameters showed statistically significant changes. The articular angle, gonial angle, the mandibular plane angle, and Ramal height decreased, Pogonion-Nasion parallel to Sella-Nasion increased postsurgically. Conclusion: There were significant condylar changes and the rigid fixation method provided maximum stability after the BSSO surgical procedure.