title: Screw osteosynthesis compared with wire osteosynthesis in advancement genioplasty: a retrospective study of skeletal stability.
abstract: OBJECTIVE
  To compare the skeletal stability of wire and screw fixation after advancement genioplasty.
  
  
  METHODS
  Retrospective study.
  
  
  METHODS
  Teaching hospital and private practice, South Africa.
  
  
  METHODS
  40 Patients who required advancement genioplasty, 20 in each group.
  
  
  METHODS
  Advancement genioplasty measurements made on cephalometric radiographs before and immediately after operation, and at least 6 months later.
  
  
  METHODS
  Comparison of horizontal and vertical measurements.
  
  
  RESULTS
  In the screw (rigid) group mean horizontal advancement was 6.3 mm followed by a relapse of 0.3 mm during the follow up period. The corresponding figures for the wire (non-rigid) group were 5.8 and 0.5 mm. The two differed significantly in the degree of vertical change but the result is clinically unimportant. There was no difference in the degree of horizontal change.
  
  
  CONCLUSIONS
  There was no difference in skeletal stability between the two groups.
authors.affiliation: Division of Maxillofacial and Oral Surgery, University of the Witwatersrand, Johannesburg, South Africa.
authors.forename: J P
authors.initials: JP
authors.lastname: Reyneke
authors.forename: T
authors.initials: T
authors.lastname: Johnston
authors.forename: W J
authors.initials: WJ
authors.lastname: van der Linden
mesh_terms: D000293:Adolescent; D000328:Adult; D001863:Bone Screws; D001864:Bone Wires; D002508:Cephalometry; D002680:Chin / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D010027:Osteotomy / Q000295:instrumentation*; D011859:Radiography; D019651:Plastic Surgery Procedures; D012008:Recurrence; D012189:Retrospective Studies; D013193:Stainless Steel; D014025:Titanium; D016896:Treatment Outcome; D014716:Vertical Dimension
chemical_list: D013193:Stainless Steel; D014025:Titanium