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No generally accepted definition of osteoarthritis exists. Traditionally, the diagnosis is obtained by radiographic examination but different definitions are used for different purposes. Since no causal treatment exists, treatment is aiming at reducing symptoms and improving function. The correlation between radiographic features of osteoarthritis and symptoms is poor. Thus, it is recommended that in the early and moderate stages the diagnosis osteoarthritis be obtained through clinical examination. Radiographs should be obtained when other serious pathologies are suspected or when operative procedures are being discussed.

There is no causal treatment for osteoarthritis. Instead treatment is aimed at decreasing pain and improving function. The base of osteoarthritis treatment is education and exercise. Exercise, both aerobic exercise and muscular strength training, have positive effects on pain and function. The minimum recommendations of exercise are equivalent to the recommendations of physical activity to obtain or maintain a good general health. Acupuncture is a safe and effective treatment for osteoarthritis pain. However, function is not automatically improved when pain is relieved.