Bilateral sagittal split osteotomies (BSSO) and mandibular distraction ostoegenesis (MDO) have both been applied in the surgical treatment of Class II mandibular hypoplasia. This randomized controlled trial aimed to compare the stability and morbidities of both techniques. From the preliminary data, skeletal relapse seems to be comparable between BSSO and MDO within the first post-operative six months. Objective and subjective neurosensory evaluation showed no significant difference in all mean scores for LT, 2PD and PPPT between both surgical techniques. Localized wound infection was a common post-operative complication for MDO. A greater sample size is required to ascertain which technique is better.