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Osteoarthritis (OA) occurs when the cartilage (a tough, but flexible spongy tissue at the ends of bones in the affected joint) doesnât work as well as it should, this causes the ends of bones glide against each other with more friction. This joint disease manifests itself by generating some symptoms.n diagnosing OA, physical examination is usually the first step. In this procedure, your doctor will closely evaluate and examine the affected joint physically through symptoms that appear. The following are some major concern that will be closely evaluated in physical examination: 1  The level of jointâs range motion!
In OA, this cartilage breaks down.OA usually occurs in the fingers and weight-bearing joints; these include, knees, feet, hips and back. Osteoarthritis is the result of changes in the cells of the cartilage resulting in a loss of elasticity. Over time this causes the cartilage to thin out and in some situation breakdown all together. This leaves the ends of the bone without its smooth covering, and the joint loses its easy mobility..