5Key J A, Ford L T. Experimental intervertebral-disc lesions [ J ], J Bone Joint Surg Am, 1948, 30A(3) : 621 -630.
6Hadjipavlou A G, Tzermiadianos M N, Bogduk N, et al. The patho- physiology of disc degeneration : a critical review [ J ]. J Bone Joint Surg Br, 2008, 90(10): 1261 -1270.
7Sobajima S, Kompel J F, Kim J S, et al. A slowly progressive and re- producible animal model of intervertebral disc degeneration character- ized by MRI, X-ray, and histology [ J ]. Spine ( Phila Pa 1976) , 2005, 30(1) : 15 -24.
8Niinimaki J, Ruohonen J, Silfverhuth M, et al. Quantitative magnetic resonance imaging of experimentally injured porcine intervertebral disc [J]. Acta Radiol, 2007, 48(6): 643-649.
9Benneker L M, Heini P F, Anderson S E, et al. Correlation of radio- graphic and MRI parameters to morphological and biochemical assess- ment of intervertebral disc degeneration[ J]. Eur Spine J, 2005, 14 (1) : 27 -35.
10Hoogendoorn R J, Wuisman P I, Smit T H, et al. Experimental inter- vertebral disc degeneration induced by chondroitinase ABC in the goat [J]. Spine (PhilaPa1976),2007, 32(17): 1816 -1825.