title: Comparison of titanium and resorbable copolymer fixation after Le Fort I maxillary impaction.
abstract: BACKGROUND
  Advances in skeletal stabilization techniques have led to the use of titanium devices for rigid fixation. Their advantages include strength and skeletal stability, but they also have disadvantages. The purpose of this study was to investigate the stability of a resorbable copolymer as a potential alternative to titanium for fixation of Le Fort I maxillary impaction.
  
  
  METHODS
  Fifty consecutive patients underwent maxillary impaction with nonsegmental monopiece Le Fort I osteotomy. Twenty-five patients were treated with titanium fixation; 25 patients were treated with resorbable copolymer fixation (82% poly-L-lactic acid: 18% polyglycolic acid). Lateral cephalograms were obtained 1 week preoperatively, 1 week postoperatively, and a minimum of 8 months postoperatively. Linear and angular measurements were recorded digitally to evaluate 2-dimensional skeletal changes.
  
  
  RESULTS
  Statistical analysis showed no significant radiographic differences (P <0.05) in long-term stability in or between the 2 groups. No clinical or radiographic evidence of wound healing problems was noted.
  
  
  CONCLUSIONS
  These results support the use of resorbable copolymer fixation for Le Fort I impaction as a viable alternative to titanium fixation.
authors.affiliation: University of Toronto, Toronto, Ontario, Canada.
authors.forename: Walinder S
authors.initials: WS
authors.lastname: Dhol
authors.forename: Johan P
authors.initials: JP
authors.lastname: Reyneke
authors.forename: Bryan
authors.initials: B
authors.lastname: Tompson
authors.forename: George K B
authors.initials: GK
authors.lastname: Sándor
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D001672:Biocompatible Materials / Q000737:chemistry; D001860:Bone Plates; D002508:Cephalometry / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D019344:Lactic Acid / Q000737:chemistry; D008137:Longitudinal Studies; D008297:Male; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D009295:Nasal Bone / Q000473:pathology; D019340:Osteotomy, Le Fort / Q000295:instrumentation* / Q000379:methods; D010159:Palate / Q000473:pathology; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D014025:Titanium / Q000737:chemistry; D014716:Vertical Dimension
chemical_list: D001672:Biocompatible Materials; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D014025:Titanium