[Surgical correction of Crouzon syndrome using LeFort III advancement osteotomy]

Crouzon syndrome is one of craniosynostosis syndromes (or craniofacial dysostosis). It consists of multiple craniofacial deformities including severe midface retrusion, exorbitism and close bite. In 11 cases LeFort III advancement osteotomy to move the midface segments was performed in past eight years. We evaluate the result of reconstructive and postoperative aesthetic improvement using measurements of lateral cephalograms and exophthalmetry. Changes in midface horizontal view are obvious postoperatively, and SNA is increased from 70.9 degree to 74.5 degree, SNB decrease from 85.1 degree to 80.8 degree, and ANB increase from -14.2 degree to -6.3 degree. Midface segment is brought forward (average 10mm) and downward (average 2mm) postoperatively. The distance from the posterior nasal spine to the posterior pharyngeal wall on cephalograms is increased from 9.1mm to 19mm. Complications are discussed.