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Sagittal split osteotomy

. The ramus of the mandible is divided by creating a horizontal osteotomy on the medial aspect of the mandible and a vertical osteotomy on the lateral aspect of the mandible. These are connected by an anterior ramus osteotomy. The lateral cortex of the mandible is then separated from the medial aspect, and the mandible is advanced or set back for correction of mandibular deficiency or excess, respectively.