title: [Treatment of upper cervical spine instability with posterior fusion plus atlantoaxial pedicle screw].
abstract: OBJECTIVE
  To evaluate the clinical efficacies, indications and application values of posterior fusion plus pedicle screw fixation in the treatment of upper cervical spine instability.
  
  
  METHODS
  From May 2006 to December 2010, a total of 24 patients with atlantoaxial instability were treated with C1-2 pedicle screws and rod fixation under general anesthesia. There were 18 males and 6 females with a mean age of 49.8 years old (range: 17 - 69).
  
  
  RESULTS
  The postoperative radiographs verified a good position of all screws with satisfactory atlantoaxial reduction. A mean follow-up period of 23 months (range: 3 - 45) showed no injury of spinal cord and vertebral artery or inter fixation failure. Atlantoaxial alignment and stability were restored without instrumentation-related complications.
  
  
  CONCLUSIONS
  Posterior atlantoaxial pedicle screw and rod fixation provide immediate three-dimensional rigid fixation of atlantoaxial joint. It is a more effective technique than with previously reported techniques.
authors.affiliation: Department of Orthopedics, Xuzhou Central Hospital, Xuzhou, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Ma
authors.forename: Ji-bin
authors.initials: JB
authors.lastname: Wu
authors.forename: Meng
authors.initials: M
authors.lastname: Zhao
authors.forename: Wei-xiang
authors.initials: WX
authors.lastname: Dai
authors.forename: De-hui
authors.initials: DH
authors.lastname: Wu
authors.forename: Zhao-hong
authors.initials: ZH
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Feng
authors.forename: Chao
authors.initials: C
authors.lastname: Liu
authors.forename: Qing-hua
authors.initials: QH
authors.lastname: Zhao
authors.forename: Ji-wei
authors.initials: JW
authors.lastname: Tian
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001268:Atlanto-Axial Joint / Q000601:surgery*; D001863:Bone Screws; D002574:Cervical Vertebrae; D005260:Female; D005593:Fracture Fixation, Internal / Q000379:methods*; D006801:Humans; D016268:Internal Fixators; D007593:Joint Instability / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D013123:Spinal Fusion / Q000379:methods; D016896:Treatment Outcome; D055815:Young Adult