Arthritis destroys the cartilage covering the ends of bones. The normally smooth joint surfaces become rough and uneven. As a result, the joint cannot move smoothly. It becomes stiff, and swollen, causing pain and limited movement
Arthritis of the Knee joint may be caused by:
- age-related osteoarthritis (wear -and-tear arthritis)
- chronic inflammatory disease ( rheumatoid arthritis)
- traumatic arthritis , which can occur after a fracture or other bone injury
- some birth defects and growth disorders
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