title: The evaluation of jaw function subsequent to bilateral sagittal split osteotomy.
abstract: OBJECTIVE
  The objective of the present study was to evaluate the jaw function and anatomical changes subsequent to orthodontic treatment combined with mandibular advancement or set-back surgery.
  
  
  METHODS
  The sample consisted of 67 combined skeletal and dental malocclusion patients, who had received orthodontic and surgical treatment previously. Three and 6 months following jaw surgery, the following jaw functions were evaluated: the level of occlusal force developed, the efficiency of masticatory function, the size in the temporomandibular joint (TMJ), the relationship between occlusal force and maxillo-mandibular skeletal change, and the range of mandibular movement.
  
  
  RESULTS
  The results revealed that after surgery the occlusal force, masticatory function, TMJ positioning, and mandibular movement distance were all different from presurgery values. The surgical set-back group jaw function recovery proved to be more rapid than that for the mandibular-advancement group.
  
  
  CONCLUSIONS
  Surgical mandibular advancement and set-back by sagittal-split osteotomy influence subsequent mandibular function.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Wuhan University, Wuhan City, China.
authors.forename: Xue Wen
authors.initials: XW
authors.lastname: Yang
authors.forename: Yao Jun
authors.initials: YJ
authors.lastname: Dong
authors.forename: Xing
authors.initials: X
authors.lastname: Long
authors.forename: Guo Zhi
authors.initials: GZ
authors.lastname: Zhang
authors.forename: Chia Tze
authors.initials: CT
authors.lastname: Kao
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001732:Bite Force; D002508:Cephalometry; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000502:physiology* / Q000601:surgery*; D019186:Mandibular Advancement; D008409:Mastication; D019647:Oral Surgical Procedures; D010027:Osteotomy; D011184:Postoperative Period; D011378:Prognathism / Q000601:surgery; D016059:Range of Motion, Articular; D018709:Statistics, Nonparametric; D013704:Temporomandibular Joint / Q000033:anatomy & histology / Q000502:physiology