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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.
Surgical Treatment of Hyperextended Knee. If the knee hyperextension causes tear or rupture of the tendon, then surgery may be needed to repair it. One of the most common tendon injuries of the knee joint is ACL or anterior cruciate ligament rupture. These occur in extreme hyperextension of the knee joint. Injuries to the posterior cruciate ligament (PCL) and popliteal tendon can also occur with a hyperextended knee and require surgery for repair.