Mandibular osteotomies
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Excess or deficiency of the mandible can result in abnormal occlusion and facial deformity. Bilateral sagittal split osteotomy (BSSO) is commonly used to correct mandibular positioning by splitting the ramus and body of the mandible, allowing advancement or setback of the mandible through a transoral incision. For mandibular deficiency cases, bone grafts from the iliac crest are often placed to fill the osteotomy defect.
Mandibular osteotomies
- 1. Mandibular osteotomies: - Excess growth of the mandible frequently results in an abnormal occlusion with class III molar and cuspid relationships and a reverse overjet in the incisor area. Deficiency results in class II. - An obvious facial deformity may also be evident. Facial features associated with mandibular excess include a prominence of the lower third of the face, particularly in the area of the lower lip and chin in the anteroposterior and vertical dimensions. - Correction of mandibular is mostly done by the bilateral sagittal split osteotomy (BSSO). - BSSO is accomplished through a transoral incision similar to that for the intraoral vertical ramus osteotomy. The osteotomy splits the ramus and posterior body of the mandible in a sagittal fashion which allows either setback or advancement of the mandible. The telescoping effect in the area of the osteotomy produces large areas of bony overlap that have the flexibility necessary to move the mandible in several directions. - The technique has become one of the most popular methods for treatment of both mandibular deficiency and mandibular excess. - In surgical correction of mandibular deficiency, iliac crest bone grafts in the area of the osteotomy defect should be done. P.S: - That’s what I got from Peterson, nothing much I know but it's what I found must important. - If u have a copy of " Contemporary Oral and Maxillofacial Surgery" check chapter 25, I found good pictures that might come in OSCE. But I don’t know how to upload it.