Three dimensional repositioning and fixation of the external fragments of mandibular ramus in sagittal split ramus osteotomy of the mandible

In orthognathic surgery (sagittal split ramus osteotomy of the mandible: SSO) there are problems such as postoperative arthrotic symptoms or relapse of the mandibular position. Prevention of such problems may require accurate repositioning of the external (proximal) fragments of the mandibular ramus. Consequently, some techniques for repositioning condyles and external fragments of the mandibular ramus have been reported.However, these techniques are not always successful in exact three-dimensional repositioning, so we devised a system consisting of repositioning and rigid fixation, and have been using these techniques in clinical applications. Our system has the following advantages:1. exact repositioning of external fragments of the mandibular ramus including condyles of the mandible.2. rigid fixation under repositioning.3. exact confirmation of repositioning is relatively easy.We thus concluded that our system is very valuable for SSO and modified techniques.