Study of interferences between proximal and distal bony segments in bilateral sagittal split ramus osteotomy of facial asymmetry patients

Abstract

Background and Objectives: Bilateral sagittal split ramus osteotomy (BSSRO) is the most common and stable method to correct mandibular prognathism. However, in facial asymmetry, there may be condyle distortions because of the interferences between the proximal and distal segments. Intraoral vertical ramus osteotomy (IVRO) has advantages in asymmetric patients due to less bony interferences. To overcome this disadvantage, the short-lingual split technique has been proposed. However, a torque on the proximal segment remains according to the degree of asymmetry. The object of this study was to compare the amount of such interferences in the above-mentioned methods. Also, an improved version of the short-lingual split method is presented.