title: Stability of maxillary position after Le Fort I osteotomy using self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the stability of Le Fort I osteotomy using self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws.
  
  
  METHODS
  Nineteen patients who had Le Fort I osteotomy and internal fixation using self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws were evaluated both radiographically and clinically. Changes in maxillary position after operation were documented 1 week, 1, 3, 6 mo, and/or 1-yr postoperatively with lateral cephalometric tracings. Complications of the self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws were evaluated by follow-up roentgenograms and clinical observation. A mixed model analysis for repeated measures was used for statistical analysis.
  
  
  RESULTS
  Maxillary position was stable after operation with no change between time points (P > .05). There were no complications with the self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws.
  
  
  CONCLUSIONS
  Internal fixation of the maxilla after Le Fort I osteotomy with self-reinforced biodegradable poly-70L/30DL-lactide miniplates and screws is a reliable method for maintaining the postoperative maxillary position after Le Fort I osteotomy.
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seodaemun-gu, Seoul, Korea.
authors.forename: Bong Chul
authors.initials: BC
authors.lastname: Kim
authors.forename: Bonnie L
authors.initials: BL
authors.lastname: Padwa
authors.forename: Hyung-Sik
authors.initials: HS
authors.lastname: Park
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Jung
mesh_terms: D020341:Absorbable Implants; D001860:Bone Plates; D001863:Bone Screws; D002508:Cephalometry; D003766:Dental Occlusion; D005260:Female; D005500:Follow-Up Studies; D005624:Frontal Bone / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D009295:Nasal Bone / Q000000981:diagnostic imaging; D009777:Occipital Bone / Q000000981:diagnostic imaging; D056948:Orthognathic Surgical Procedures / Q000295:instrumentation / Q000379:methods; D010027:Osteotomy / Q000379:methods; D019340:Osteotomy, Le Fort / Q000295:instrumentation*; D010159:Palate / Q000000981:diagnostic imaging; D011091:Polyesters / Q000737:chemistry*; D011183:Postoperative Complications; D011859:Radiography; D019291:Skull Base / Q000000981:diagnostic imaging; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D011091:Polyesters; C033616:poly(lactide)