title: A variation in the vertical osteotomy of the rami for correction of retrognathism: preliminary report.
abstract: A new method for the surgical correction of mandibular retrognathism is proposed. With this method, the ascending ramus is osteotomized vertically from an extra-oral incision. The condylar segment is then inserted in a step, which has been cut in the mandibular segment, so that the mandible is fixed in its new advanced position. This step-like support of the segments obviates the tendency to relapse. This surgical procedure is a modification of the technique for vertical osteotomy of the ascending ramus described by Robinson (1957) for the correction of retrognathism.
mesh_terms: D006801:Humans; D008334:Mandible / Q000601:surgery; D010027:Osteotomy / Q000379:methods*; D011862:Radiography, Panoramic; D063173:Retrognathia / Q000601:surgery*