[Vertical-sagittal "peninsular" osteotomy of the body of the mandible: a concept for forward displacement and anterior rotation of the mandible].

A new mandibular osteotomy is presented for special indications of severe mandibular retrognathia combined with a high mandibular plane angle, a dentoalveolar compensation and an open bite. The procedure allows an anterior rotation of the mandible with a maximum skeletal and minimum dental advancement.