Copyright ©2014 Baishideng Publishing Group Inc.
World J Orthop. Nov 18, 2014; 5(5): 677-684
Published online Nov 18, 2014. doi: 10.5312/wjo.v5.i5.677
Table 1 Classification of articular lesions by severity
GradeOuterbridgeModified outerbridgeICRS
0Normal cartilageIntact cartilageIntact cartilage
ISoftening and swellingChondral softening or blistering with intact surfaceSuperficial (soft indentation or superficial fissures and cracks)
IIFragmentation and fissures in area less than 0.5 inch in diameterSuperficial ulceration, fibrillation, or fissuring less than 50% of depth of cartilageLesion less than half the thickness of articular cartilage
IIIFragmentation and fissures in area larger than 0.5 inch in diameterDeep ulceration, fibrillation, fissuring or chondral flap more than 50% of cartilage without exposed boneLesion more than half the thickness of articular cartilage
IVExposed subchondral boneFull-thickness wear with exposed subchondral boneLesion extending to subchondral bone