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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.
The knee has three compartments: medial (inside of knee), patellofemoral (between knee cap and femur), and lateral (outside section of knee joint). The most common form of osteoarthritis is a tri-compartmental arthritis that affects all 3 compartments of the knee. Therefore, it makes sense that the traditional knee replacement is a tri-compartmental arthroplasty that replaces all 3 compartments of the knee.