2Wright NM. Post.erior C2 fixat.ion using bilateral, crossing C2 laminar screws : case series and technical note [ J ]. J Spinal Disord Tech,2004,17 (2) : 158 - 162.
3Jeanneret B,Magerl F. Primary posterior fusion C1/2 in odontoid fractures : indications, technique, and results of transarticular screw fixation [ J ]. J Spinal Disord, 1992,5 (4) :464 -475.
4Tan M, Wang H, Wang Y, et al. Morphometric evaluation of screw fixation in atlas via posterior arch and lateral mass [ J ]. Spine ( Phita Pa 1976),2003,28 (9) : 888 - 895.
