2[1]Nakai O,Ookawa A,Yamaura I. Long-term roentgenographic and functional changes in patents who were treeted with wide fenestration for central lumber stenosis [ J ]. J Bome Joint Surg (Am), 1991,73:1184-1191.
3Kadish L J, Simnons E H. Anomalies of the lumbosacral nerve roots. J Bone Joint Surg, 1984;66:411.
3Nagayama R, Nakamura H, Yamano Y, et al. An Experimental study of the effects of root retraction on the posterior ramus[ J]. Spine,2000,25 (4) :418 - 424.
5ThelanderU, FagerlundM, Friberg S, eta. 1 Describing the size of lumbar disc hemiations using computed tomography - a com- parison of different size index calculations and their relation to sciatica [ Jt. Spine, 1994, 19(17):1 979-1 984.
