Maxillomandibular advancement (MMA) surgery in OSAHS patients traditionally consists of a) a bilateral sagittal split osteotomy of the mandible and b) a Le Fort I osteotomy of the maxilla. Maxillomandibular advancement (MMA) surgery in OSAHS patients traditionally consists of a) a bilateral sagittal split osteotomy of the mandible and b) a Le Fort I osteotomy of the maxilla. Adopted from reference [77] with permission from the publisher. O.M. Vanderveken, and A. Hoekema breathe 2010;7:157-167 ©2010 by European Respiratory Society