title: Analysis and comparison of clinical results of bilateral sagittal split ramus osteotomy performed with the use of monocortical locking plate fixation or bicortical screw fixation.
abstract: OBJECTIVE
  The aim of this study was to compare clinical results of bilateral sagittal split ramus osteotomy (BSSRO) with the use of monocortical locking plate or bicortical screw fixation.
  
  
  METHODS
  Fifty-five patients underwent BSSRO for prognathism, using either monocortical locking plate (group A; n = 28) or bicortical screw (group B; n = 27) osseofixation. No intermaxillary fixation was done after surgery. Groups were subdivided according to presence or absence of mandibular asymmetry. Time course changes in condylar and skeletal stability were measured on lateral and posteroanterior cephalograms and axial radiographs before surgery and at 3 and 6 months after surgery.
  
  
  RESULTS
  In facial symmetry subjects, the change in angle of the longitudinal axis of the condyle in group A was significantly greater than that for group B up to 3 months after surgery, but no significant differences were found in facial asymmetry subjects.
  
  
  CONCLUSIONS
  The findings of this study suggest that monocortical fixation using the locking plate system to stabilize SSRO is as reliable as bicortical screw fixation regardless of facial asymmetry.
authors: Oral and Maxillofacial Surgery, Graduate School, Tokyo Medical and Dental University. Electronic address: kabasawa.osur@tmd.ac.jp.
authors: Yuhji
authors: Y
authors: Kabasawa
authors: Masaru
authors: M
authors: Sato
authors: Tsuyoshi
authors: T
authors: Kikuchi
authors: Yuriko
authors: Y
authors: Sato
authors: Yukiko
authors: Y
authors: Takahashi
authors: Yusuke
authors: Y
authors: Higuchi
authors: Ken
authors: K
authors: Omura
mesh_terms: D000328:Adult; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data; D001860:Bone Plates; D001863:Bone Screws; D002508:Cephalometry; D005146:Facial Asymmetry / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D061646:Operative Time; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods*; D011378:Prognathism / Q000000981:diagnostic imaging / Q000601:surgery*; D011859:Radiography; D016896:Treatment Outcome