title: [Treatment of atlantoaxial instability with C1-C2 posterior transarticular screw fixation].
abstract: OBJECTIVE
  To evaluate the technique of C1-C2 transarticular screw fixation for atlantoaxial instability or dislocation.
  
  
  METHODS
  Among 14 patients with atlantoaxial instability, 10 were male and 4 patients were female, with an average age of 38.6 years ranging from 17 to 62 years. All patients were treated by internal fixation with transarticular screws.
  
  
  RESULTS
  There were 28 screws applied in 14 patients. All patients were followed up. The average follow-up period was 16 months (range, 9 to 35 months). The postoperative JOA score was ranging from 13.8 to 15.8 with the average score of (14.50 +/- 0.66) and the improved rate of (76.12 +/- 4.94)%. No spinal injury and vertical artery injury was found and osseous fusion was completed in all patients.
  
  
  CONCLUSIONS
  The technique of C1-C2 transarticular screw fixation is one of the best treatments for atlantoaxial instability. Without the help of structural bone graft and aided internal fixation, morselized cancellous bone graft can acquire effective osseous fusion.
authors.affiliation: Department of Orthopaedics, Taizhou Municipal Hospital, Taizhou 318000, Zhejiang, China.
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Ruan
authors.forename: Shun-Wu
authors.initials: SW
authors.lastname: Fan
authors.forename: Xiang-Qian
authors.initials: XQ
authors.lastname: Fang
authors.forename: Hai-Bao
authors.initials: HB
authors.lastname: Wang
authors.forename: Li-ya
authors.initials: LY
authors.lastname: Qiao
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Zhao
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Han
mesh_terms: D000293:Adolescent; D000328:Adult; D001268:Atlanto-Axial Joint / Q000473:pathology* / Q000601:surgery*; D001863:Bone Screws; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016268:Internal Fixators; D007593:Joint Instability / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011859:Radiography; D015898:Tomography Scanners, X-Ray Computed; D016896:Treatment Outcome; D055815:Young Adult