Klassifikation der Chondromalacia patellae nach Outerbridge

 
Referenz

Outerbridge RE (1961) The etiology of chondromalacia patellae. J Bone Jt Surg 43-B: 752-757

Grade I Softening and swelling of the articular cartilage
Grade IIFragmentation and fissuring in an area half an inch (1.3 cm) or less in diameter
Grade IIIFragmentation and fissuring in an area of more than half an inch (1.3 cm) in diameter
Grade IVErosion of articular cartilage down to (subchondral) bone