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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.

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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.