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Knowledge center. The knee is a complex structure and one of the most stressed joints in the body. It is the largest joint, vital for movement, and vulnerable to injury. The knee is the most commonly injured joint by adolescent athletes with an estimated 2.5 million sports-related injuries annually. Many knee injuries can be successfully treated with simple measures, such as bracing and strengthening exercises. Other injuries may require surgery to correct.
1 Osteoarthritis is the most common reason for knee replacement operation in the U.S. 2  Risks of total knee replacement surgery have been identified. 3  Physical therapy is an essential part of rehabilitation after total knee replacement. Risks of total knee replacement surgery have been identified. 2  Physical therapy is an essential part of rehabilitation after total knee replacement. 3  Patients with artificial joints are recommended to take antibiotics before, during, and after any elective invasive procedures (including dental work).