Xray of normal right hip4/22/2024 ![]() (2018) Clinical orthopaedics and related research. Classifications in Brief: Tönnis Classification of Hip Osteoarthritis. Atlas of standard radiographs of arthritis" UNESCO and WHO grade 4: above criteria plus femoral head deformity.grade 3: criteria of grade 1 and 2 plus indistinct zone between femoral head and acetabulum subchondral signal loss due to bone sclerosis.grade 2: inhomogeneity with areas of high signal intensity in articular cartilage (T2WI) indistinct trabeculae or signal intensity loss in femoral head and neck (T1WI).grade 1: inhomogeneous high signal intensity in cartilage (T2WI).grade 5: femoral head deformity plus three of the above mentioned radiographic features.grade 4: three of the above mentioned radiographic features.grade 3: two of the above mentioned radiographic features. ![]() The Croft score uses different compositions of the following features for the grading of hip osteoarthritis: osteophytes, joint space narrowing, subchondral sclerosis, subchondral cysts 4,5.
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