The purpose of this study was to evaluate hypoesthesia of the lower lip using trigeminal somatosensory-evoked potential following 2 types of sagittal split ramus osteotomy (SSRO) and intraoral vertical ramus osteotomy (IVRO). There were 30 patients with mandibular prognathism, with and without asymmetry, who were divided into three groups: the Obwegeser method (Ob) group, the Obwegeser-Dal Pont...

Two case reports of a modified sagittal split osteotomy of the ramus of the mandible are presented which illustrate a technically simplified modality of treating various dentofacial abnormalities. A brief review of the literature is presented and observations are made on the procedures. The need for future documentation of intraoperative and postoperative results on this type of procedure is re...

The mandibular ramus bilateral sagittal split osteotomy (BSSO) is the common approach in orthognathic surgery; however, this design has some limitations to achieve a good definition angle of jaw Class II patients with decreased posterior facial height. This paper aims show novel modification and its technic description conventional BSSO which increases vertical length angle, two similar diagnos...

BACKGROUND In 1953, the sagittal ramus split osteotomy was introduced by Obwegeser. For many years, and in some countries still, this technique has defined the term oral and maxillofacial surgery. METHODS The basic design of the sagittal ramus split surgical procedure evolved very quickly. The original operation technique by Obwegeser was shortly after improved by Dal Pont's modification. The...