Extraoral and intraoral vertical subcondylar ramusosteotomy for correction of mandibular prognathism.

Vertical subcondylar ramusosteotomy for correction of mandibular prognathism was performed in 203 cases with an extraoral (EVSO) and in 55 cases with an intraoral (IVSO) approach. Clinical and surgical observations were analyzed and the 2 techniques compared with regard to operation time, per- and postoperative complications, postoperative morbidity of the patients and the duration of hospital stay. The extraoral approach demonstrated significantly shorter operation time, less blood loss and shorter hospital stay. The extent of postoperative swelling, nausea and vomiting was also in favour of the EVSO. Serious complications were few, and both techniques were considered as satisfactory and safe.