3Husted DS,Yue JJ,Fairchild TA,et al.An extrapedicular appr-oach to the placement of screws in the thoracic spine:an anato-mic and radiographic assessment.Spine,2003,28:2324-2330.
5Dick JC,Jones MP,Zdeblick TA,et al.A biomechanical comparison evaluating the use of intermediate screws and cross-linkage in lumbar pedicle fixation.J Spinal Disord,1994,7:402-407.