6Pfirrmann CWA, Metzdorf A, Zanetti M, et al. Magnetic reso-naDce classification of the lumbar intervertebral disc degenera-don [J]. Spine, 2001, 26: 1873-1878.
7Szypryt EP, Twining P, Mulholland RC. The prevalence of disc de- generation associated with neurarch detects of the lunfimr spine as- sessed by magnetic resonance imaging [J]. Spine, 1989, 14: 977-981.
8Mihara H, Onari K, Cheng BC, et al. The biomechanical effects of spondylolysis and its treatment [J]. Spine, 2003, 28: 235-238.
9Goel VK, Nishiyama K, Weinstein JN, et al. Mechanical properties of lumbar spinal motion segments as a affected by partial disc renlo- val [J]. Spine, 1986, 11: 1008-1012.
10Bonetti M, Fontana A, Aibertini F. CT-guided oxygen 0no treatment for fn-st degree spondyIoIisthcsis and spondylolysis [J]. Acta Ncur chit suppl, 2005, 92: 87-92.
