This video shows a 20 year old patient with Apert's Syndrome in whom a MFFA/ FB is performed, leaving behind the LeFort I segment for a subsequent procedure. In the particular patient, the strategy to deal with the upper and lower facial deformities in separate sessions was based upon the following considerations: There may be a higher incidence of complications such as epidural abscess in older patients undergoing monobloc fronto-facial advancement; It was felt that better stability would be provided for the Le Fort I osteotomy, which required a two segment maxillary osteotomy with posterior expansion, lengthening, and a sagittal advancement of over 20 mm.