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Table 2 The Pfirrmann classification of intervertebral discs in two groups

From: Increased lactic acid content associated with extracellular matrix depletion in a porcine disc degeneration induced by superficial annular lesion

Grade4 weeks8 weeks12 weeks
shamALshamALshamAL
I1408030
II221616490
III02001302
IV000607
V000103
  1. sham sham group, AL annular lesion group