title: Posterior cervical fixation with nitinol shape memory loop in the anterior-posterior combined approach for the patients with three column injury of the cervical spine : preliminary report.
abstract: OBJECTIVE
  The authors reviewed clinical and radiological outcomes in patients with three column injury of the cervical spine who had undergone posterior cervical fixation using Nitinol shape memory alloy loop in the anterior-posterior combined approach.
  
  
  METHODS
  Nine patients were surgically treated with anterior cervical fusion using an iliac bone graft and dynamic plate-screw system, and the posterior cervical fixation using Nitinol shape memory loop (Davydovtrade mark) at the same time. A retrospective review was performed. Clinical outcomes were assessed using the Frankel grading method. We reviewed the radiological parameters such as bony fusion rate, height of iliac bone graft strut, graft subsidence, cervical lordotic angle, and instrument related complication.
  
  
  RESULTS
  Single-level fusion was performed in five patients, and two-level fusion in four. Solid bone fusion was presented in all cases after surgery. The mean height of graft strut was significantly decreased from 20.46+/-9.97 mm at immediate postoperative state to 18.87+/-8.60 mm at the final follow-up period (p<0.05). The mean cervical lordotic angle decreased from 13.83+/-11.84 degrees to 11.37+/-6.03 degrees at the immediate postoperative state but then, increased to 24.39+/-9.83 degrees at the final follow-up period (p<0.05). There were no instrument related complications.
  
  
  CONCLUSIONS
  We suggest that the posterior cervical fixation using Nitinol shape memory alloy loop may be a simple and useful method, and be one of treatment options in anterior-posterior combined approach for the patients with the three column injury of the cervical spine.
authors.affiliation: Department of Neurosurgery, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Korea.
authors.forename: Dong-Kun
authors.initials: DK
authors.lastname: Yu
authors.forename: Dong-Hwa
authors.initials: DH
authors.lastname: Heo
authors.forename: Sung-Min
authors.initials: SM
authors.lastname: Cho
authors.forename: Jong-Hun
authors.initials: JH
authors.lastname: Choi
authors.forename: Seung-Hun
authors.initials: SH
authors.lastname: Sheen
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Cho