title: Fracture of mandibular reconstruction plates used after tumor resection.
abstract: OBJECTIVE
  We assessed the incidence of fractured plates after primary temporary AO plate reconstruction of the mandible following tumor resection.
  
  
  METHODS
  One hundred ten patients were retrospectively evaluated according to the extent of the tumor, anatomic location of the reconstruction, type of plate, additional use of radiotherapy or flap surgery (or both), and the incidence of fractured plates.
  
  
  RESULTS
  Fractured plates occurred in 8 of 110 patients. Most occurred less than 6 months after surgery. All of the 8 patients had a malignant tumor; 2 had received radiation therapy and 4 had skin flaps placed. The fractured plate was the straight type in 1 patient and the angular type in 7 patients. Among patients who had fractured plates, the average number of remaining teeth was 12.8 in the maxilla and 9.5 in the mandible.
  
  
  CONCLUSIONS
  Fractured plates were more common among patients with oral cancer with a segmental defect that did not cross the midline in whom an angular-type plate was used and no bone grafting was performed.
authors.affiliation: First Department of Oral and Maxillofacial Surgery, Tokyo Dental College, Chiba, Japan. sibahara@tdc.ac.jp
authors.forename: Takahiko
authors.initials: T
authors.lastname: Shibahara
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Noma
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Furuya
authors.forename: Ryou
authors.initials: R
authors.lastname: Takaki
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001860:Bone Plates / Q000145:classification; D001863:Bone Screws; D016025:Bone Transplantation; D016009:Chi-Square Distribution; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019248:Jaw Fixation Techniques; D007576:Jaw, Edentulous, Partially / Q000145:classification; D008297:Male; D008334:Mandible / Q000601:surgery*; D008339:Mandibular Neoplasms / Q000601:surgery*; D008341:Mandibular Prosthesis / Q000145:classification; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D013193:Stainless Steel; D013524:Surgical Flaps; D013997:Time Factors; D014025:Titanium; D016896:Treatment Outcome
chemical_list: D013193:Stainless Steel; D014025:Titanium