Osteoarthritis (OA) is cartilage failure resulting in joint pain and loss of joint functions. Knee OA is the OA of knee that mechanical forces have major effect on initiation and progression of it. Knee OA is the most common disease of knee especially in the middle to old ages. The most common findings in the history and physical examination of the patients with knee OA are mechanical knee pain, gelling knee pain, crepitus on knee motion, bony tenderness and bony enlargement in the joint line. During the flare up of Osteoarthritis, knee can show swelling due to joint effusion called “Hydrarthrosis” that is a mechanical type of synovial fluid.
Osteoarthritis
Classification Criteria for Osteoarthritis
ACR Classification Criteria for Osteoarthritis of the Hip
Traditional format
Hip pain plus at least two of the following:
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ESR of less than 20 mm per hour
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Femoral or acetabular osteophytes on radiographs
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Joint space narrowing on radiographs