2Misenhimer GR, Peeer RD, Wiltse LL, et al. Anatomic analysia of pediele Oortical and Cancellous diameters as related to screw size [J]. Spine, 1989,14 (4) : 367- 372.
3Esses SJ, Botsford DJ, Huler RJ, et al. Sargical anaromy of The sacrum,a guide for national screw fixating[J] Spine, 1991,16(sappl) : S283- 288.
7Boucher HH. A method of spinal fusion [J]. J Bone Joint Surg Br,1959,41(2):248-259.
8Roy-Camille R, Saillant G, Mazel C. Intemalfixation of the lumbar spine with pedicle screw plating [J]. Clin Orthop Relat Res, 1986,20(2) :7-17.
9Kim YJ, Lenke LG, Bridwell KH, et al. Free hand pedicle screw placement in the thoracic spine:is it safe? [J]. Spine, 2004,29 (3) : 333-342.
10Boachie-Adjei O, Girardi FP, Bansal M,et al. Safety and efficacy of pedicle screw placement for adult spinal deformity with a pedicle-probing conven-tional anatomic technique[J]. JS Pinal Disord,2000, 13(6):496-500.
