Modified technique used for sagittal splitting of the mandible

Sagittal osteotomy of the mandible is the most common orthognathic surgery procedure. The drawbacks of this technique are: nerve disturbance, the common formations of a pre-angular notch after mandibular advancement, and the impossibility of lowering the mandibular angle bicortically. The goal of the described technique is to maintain the basal mandibular edge and the internal valve in one single piece. This split prevents unsightly notches appearing after mandibular advancement and it moves down the mandibular angle during counterclockwise rotation and does not increase the intergonial distance. It is especially indicated for skeletal class II cases.