If there is damage to the articular cartilage in the joint, we can treat it arthroscopically. Failure to address these issues may lead to a chronically unstable patella and potentially an arthritic knee. Rehabilitation following reconstruction of the patellofemoral ligament focuses on getting the patient fitter, faster, stronger with a primary emphasis on promoting proper tracking of the patella. During the first month, emphasis is on healing of the repaired ligament while maintaining range of motion as allowed by the patient's surgeon on an individual basis.
As patients progress through the program, specific lower extremity strength and stabilization activities are introduced. In the final months of the rehab program, focus transitions to sports-specific training. Some people are chronically loose in the knee cap, often due to bony shapes such as a flat anterior femur trochlea in combination with tissue laxity stretchy tissues.
In those cases, careful physical therapy and strengthening exercises focused on the muscles that guide the patella are prescribed first before any surgical procedure is undertaken. Getting back into your groove. Mechanism of injury Patellar dislocation is usually caused by either a direct trauma to the knee e. Symptoms If you dislocate your patella, you may experience some of the following symptoms: Your knee buckles and can no longer support your weight Your kneecap slips off to the side You feel your knee catching when you move it You have pain in the front of your knee that increases with activities You are experiencing pain in your knee when you are sitting You notice stiffness and swelling of your knee You notice creaking or crackling sounds when you move your knee Examination and diagnosis A careful physical exam, X-rays and an MRI are used to diagnose the extent of the injuries.
When the medial patellofemoral ligament on the inside of the knee tears as a result of patellar dislocation, you might need reconstructive surgery. These tears are caused by anatomic variables like:. These conditions might need an osteotomy to correct the alignment by reshaping the bone or moving the attachment of the patella tendon. In special circumstances, the groove the kneecap should ride in is either absent or shaped like a rounded dome rather than as a "V" shape.
This can result in instability that can be disabling, and it can only be corrected with surgery called trochleoplasty. Trochleoplasty involves your surgeon reshaping the trochlear groove, the v-shaped groove in front of the knee. If you experience recurrent kneecap dislocation, you may be offered surgery to tighten the muscles or reconstruct the inside ligaments.
In rare circumstances you may need to have the bone cut and repositioned. Some surgeons are starting to recommend preventative surgery to repair the medial patellofemoral ligament MPFL after the first kneecap dislocation. This is because repeated dislocations can damage cartilage, leading to an increased risk of arthritis. This website uses cookies so that we can provide you with the best user experience possible.
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Skip to content. Kneecap patella dislocation. You are here:. What is kneecap patella dislocation? Read more.. What causes a dislocated kneecap? A dislocated kneecap can be caused by: A blow to the knee, for example if the knee joint collides with another person or object with great force.
A sudden change of direction while the leg is still planted firmly on the ground, such as during sports or dancing. Weak leg muscles which puts pressure on the knee joint. A misaligned or elevated kneecap. What are the symptoms of a dislocated kneecap?
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