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Table 2 Modified outerbridge classification of articular cartilage lesions [16,17,18,19,20]

From: Proprioception deficiency in articular cartilage lesions of the knee

GradeDescription of lesion
0Normal
ISoftening
IISuperficial fibrillation
IIIPartial thickness loss of cartilage
IVFull thickness loss of cartilage (exposed subchondral bone)