Arthroscopy Article Condylar remodelling Condylar resorption Internal derangement Le Fort I osteotomy Orthognathic surgery Osteoarthrosis Relapse Sagittal split osteotomy adolescent adult arthroscopic surgery arthroscopy clinical outcome cohort analysis conservative treatment female follow up human joint surgery major clinical study male mouth orthognathic surgery pain postoperative period priority journal retrospective study sagittal split ramal osteotomy