title: Management of acute odontoid fractures with single-screw anterior fixation.
abstract: OBJECTIVE
  Accepted management strategies for odontoid fractures include external immobilization and surgical stabilization using anterior or posterior approaches. Displaced Type II fractures and rostral Type III fractures are at high risk for nonunion. Anterior fixation of odontoid fractures with a single cortical lag screw is a relatively new technique that combines rigid internal stabilization with preservation of intrinsic C1-C2 motion. We retrospectively reviewed our series of 26 consecutive patients who underwent odontoid screw fixation, to further define the safety and efficacy of the technique.
  
  
  METHODS
  During a 5-year period, 26 patients presented with acute traumatic Type II odontoid fractures. Ten patients were female and 16 were male, with a mean age of 35 years. All patients underwent anterior odontoid screw fixation by the senior surgeon (RWH), within a mean of 3 days after injury. All patients were postoperatively maintained in external orthoses, for a mean of 7.2 weeks, and were monitored with serial clinical and radiographic examinations.
  
  
  RESULTS
  With a mean follow-up period of 30 months, radiographic fusion was documented for 25 of 26 patients (96%). No complications related to the surgical approach were identified, and all patients remained in neurologically stable condition. Two complications (8%) were related to the instrumentation; one patient required external immobilization because of suboptimal screw placement, and one patient required posterior atlantoaxial arthrodesis because of inadequate fracture reduction.
  
  
  CONCLUSIONS
  Single-screw anterior odontoid fixation was associated with a relatively low complication rate and a high fusion rate in this study. We think that this should be the preferred treatment method for acute Type II odontoid fractures.
authors.affiliation: Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pennsylvania, USA.
authors.forename: B R
authors.initials: BR
authors.lastname: Subach
authors.forename: M A
authors.initials: MA
authors.lastname: Morone
authors.forename: R W
authors.initials: RW
authors.lastname: Haid
authors.forename: M R
authors.initials: MR
authors.lastname: McLaughlin
authors.forename: G R
authors.initials: GR
authors.lastname: Rodts
authors.forename: C H
authors.initials: CH
authors.lastname: Comey
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D017102:Fracture Healing / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009809:Odontoid Process / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011859:Radiography; D016103:Spinal Fractures / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome