Recurrent patellar luxation occurs when the kneecap slips out of place. The patella is the bone best known as the patella. It fits tightly into a V-shaped groove in the front of the knee and moves up and down when the leg is bent or stretched. The patella can be dislocated if the knee joint is slightly bent and turned inward while the foot is resting on the floor.
The knee contains four bones: the femur (femur), the patella (patella), the tibia, and a smaller bone in the lower leg (fibula). Knee dislocation occurs when one of these bones moves out of its normal position. In most cases, this is a dislocated kneecap. However, the tibia and fibula may be dislocated from the joint.
This injury is much rarer and more serious than a patellar dislocation. Another name for this injury is femorotibial dislocation. It accounts for less than 1% of orthopedic injuries. When the medial patellofemoral ligament inside the knee is torn as a result of a patellar dislocation, you may need reconstructive surgery.
Patellar subluxation can also cause discomfort during activity and pain around the front or side of the patella, known as patellofemoral pain syndrome (PFPS). While the kneecap may not fully come out of the groove of the knee joint, the unstable kneecap will still cause knee pain. If you experience a patellar subluxation, it's likely that the patella is being stretched to the outside (lateral side) or inward (medial side) of the knee. You can keep your knees healthy and reduce your risk of having a knee dislocation by maintaining a healthy body weight.
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