Native radiological classification of osteoarthritis according to the Kellgren and Lawrence score.
Osteophytes (new bone formations) | Joint space | Sclerosis | Deformation | Points |
none or questionable | none or questionable narrowed | none | none | 0 |
unique | unique | light | light | 1 |
large | advanced | light with cysts | distinctly | 2 |
cancelled | strong with cyst formation | 3 |
Interpretation
According to the Kellgren-Lawrence score, the radiological expression of osteoarthritis is divided into five grades:
- Grade 0 = 0 points
- Grade 1 = 1-2 points
- Grade 2 = 3-4 points
- Grade 3 = 5-9 points
- Grade 4 = 10 points
Grade 1: Minor subchondral (“below the cartilage“) sclerosis, no joint space narrowing or osteophytesGrade 2: Minor joint space narrowing and incipient osteophyte formation, indicated joint surface irregularitiesGrade 3: Marked osteophyte formation, marked joint surface irregularitiesGrade 4: Marked joint space narrowing to complete destruction, deformity/necrosis of joint partners.
Classification of osteoarthritis according to Noyes/Stabler.
Stage | Macroscopic-arthroscopic pathologies |
1 | |
2 |
|
3 |
|
Classification of rhizarthrosis according to Eaton/Little.
Stage | Native radiological pathologies |
1 | Joint splitter extension if necessary |
2 | Joint space narrowing, osteophytes (bone neoplasms), free joint bodies <2 mm. |
3 | Progressive joint narrowing, osteophytes, free joint bodies > 2 mm. |
4 | Additional osteoarthritis of the scaphoid (scaphoid trapezoid) joint (STT joint; joint between the scaphoid (scaphoid bone), trapezium (large polygonal bone), and the trapezoideum (small polygonal bone))/carpal arthrosis |