A case of mandibular prognathism with Marfan's syndrome treated with sagittal splitting ramus osteotomy was presented.
A 37 year-old man, complaining of difficulty of mouth opening was referred to our clinic. The patient was diagnosed as bilateral temporomandibular joints arthrosis with mandibular prognathism.
Although occlusal treatment with bite splint was effective to some extent, intermittent trismus did not disappear, so bilateral sagittal splitting ramus osteotomy was performed to correct his dental malocclusion.
Postoperative course was not eventful and his range of mouth opening increased to 35mm between incisal edges of maxillary and mandibular central incisor.