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Table 2 ICRS classification as described by Mainil-Varlet et al. [2]

From: Comparison of properties determined using electromechanical assessment (Arthro-BST™) with macroscopic and histological properties in symptomatic human articular cartilage of the hip

Grade Property
1 Superficial lesions, fissures and cracks, soft indentation
2 Defects that extend to less than 50% in depth
3 Defects that extend to more than 50% in depth
4 Complete loss of cartilage thickness, bone only