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Table 3 Assessment of cartilage damage during primary and revision ACL-R according to the classification by Outerbridge

From: Joint effusion, anteroposterior stability, muscle strength and degree of patellofemoral osteoarthritis significantly impact outcome following revision ACL reconstruction

Outerbridge-classification Patellofemoral Medial tibia Lateral tibia Medial femur Lateral femur
ACL surgery primary revision primary revision primary revision primary revision primary revision
Grade 0 65 51 71 66 71 69 51 29 69 65
Grade 1 0 2 0 0 0 0 1 0 0 0
Grade 2 4 6 0 1 0 1 12 18 2 1
Grade 3 2 10 0 3 0 1 7 14 0 3
Grade 4 0 2 0 1 0 0 0 10 0 2