TÖNNİS CLASSIFICATION of OSTEOARTHRITIS by RADIOGRAPHIC CHANGES
GRADE
DESCRIPTION
0
No signs of osteoarthritis
1
Mild: Increased sclerosis, slight narrowing of the joint space, no or slight loss of head sphericity
2
Moderate: Small cysts, moderate narrowing of the joint space, moderate loss of head sphericity
3
Severe: Large cysts, severe narrowing or obliteration of the joint space, severe deformity of the head