X-ray of osteoarthritis of the hip joint
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Author:
Mikael Häggström [notes 1]

Hip joint with no signs of osteoarthritis.
The most commonly used radiographic classification system for osteoarthritis of the hip joint is the Kellgren-Lawrence system (or K-L system).[1] It uses plain radiographs.
Grade | Description |
---|---|
0 | No radiographic features of osteoarthritis |
1 | Possible joint space narrowing (normal joint space is at least 2 mm at the superior acetabulum)[2] and osteophyte formation |
2 | Definite osteophyte formation with possible joint space narrowing |
3 | Multiple osteophytes, definite joint space narrowing, sclerosis and possible bony deformity |
4 | Large osteophytes, marked joint space narrowing, severe sclerosis and definite bony deformity |
Osteoarthritis of the hip joint may also be graded by Tönnis classification. There is no consensus whether it is more or less reliable than the Kellgren-Lawrence system.[3]
Grade | Description |
---|---|
0 | No osteoarthritis signs |
1 | Mild:
|
2 | Moderate:
|
3 | Severe:
|
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ Zdravko Jotanovic, Radovan Mihelic, Gordan Gulan, Branko Sestan, Zlatko Dembic (2015). "Osteoarthritis of the hip: An overview ". Periodicum biologorum 117 (1). Archived from the original. .
- ↑ 2.0 2.1 Lequesne, M (2004). "The normal hip joint space: variations in width, shape, and architecture on 223 pelvic radiographs ". Annals of the Rheumatic Diseases 63 (9): 1145–1151. doi: . ISSN 0003-4967.
- ↑ Terjesen, Terje; Gunderson, Ragnhild B (2012). "Radiographic evaluation of osteoarthritis of the hip ". Acta Orthopaedica 83 (2): 185–189. doi: . ISSN 1745-3674.
- ↑ . Tönnis Classification of Osteoarthritis by Radiographic Changes. Society of Preventive Hip Surgery. Retrieved on 2016-12-13.