[Conservation of the mandible by osteotomy-osteosynthesis in "trans-mandibular" oropharyngectomy. 34 case reports].

Trans-mandibular oropharyngectomy was performed in 34 patients, as initial treatment in 20 cases and following tumoral recurrence after radiotherapy in the other 14 cases. Results indicate that mandibular conservation is possible when bone is not affected by the neoplastic process and when an oropharyngoplasty ensures perfect covering of the mandible. The site of choice for osteotomy-osteosynthesis appears to be the parasymphysial region, as this provides a very satisfactory route of approach, the mental nerve and innervation of the lip are respected, it is situated outside of the irradiation field (before or after surgery), and there are no dental articulation complications.