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Table 5 Jäger and Wirth classification for osteoarthritis of the knee [15]

From: The 5.5-year results of MegaOATS – autologous transfer of the posterior femoral condyle: a case-series study

Grade

 

1

Initial osteoarthritis with hinted osteophytes at the eminentia intercondylaris and the articular side of the inferior and superior pole of the patella

2

Moderate osteoarthritis with hinted osteophytes at the tibia plateau, moderate narrowing of the joint space, hinted flattening of the femoral condyles, moderate subchondral sclerosis

3

Advanced osteoarthritis with 50% narrowing of the joint space, manifest flattening of the femoral condyles, osteophytes at the tibial plateau, tibial spine, intercondylar notch and at the articular side of the inferior and superior pole of the patella. Significant subchondral sclerosis

4

Pronounced osteoarthrosis. Joint destruction with significant narrowing of the joint space or loss of joint space, disturbed contour of the bone margins. Cystic changes in the tibia plateau, femoral condyles and patella. Subluxation of the tibia to the femur