Kneecap Dislocation

Brief Outline of Subluxing Kneecap (Patellar Dislocation)

subluxation is a partial dislocation of the kneecap, whereby the kneecap slides partially out of the groove in which it is designed to travel. Pain and swelling may accompany this condition. Athletes who suffer from a muscle imbalance or a structural deformity, such as a high kneecap, have a higher risk of a subluxing kneecap. This condition can also happen with forceful contractions, such as planting to change direction or landing from a jump.

Kneecap Dislocation

 

Cause of Subluxing Kneecap (Patellar Dislocation)

Strength imbalance between the outer quadriceps group and the inner quadriceps group. Impact to the side of the kneecap. Twisting of the knee.

Signs and Symptoms of Subluxing Kneecap (Patellar Dislocation)

Feeling of pressure under the kneecap. Pain and swelling behind the kneecap. Pain when bending or straightening the knee.

Complications if Left Kneecap Subluxation or Patellar Dislocation Unattended

Continued subluxations can cause small fractures in the patella, cartilage tears, and stress to the tendons. Failure to treat a subluxation could lead to chronic subluxations.

Treatment for Kneecap Subluxation or Patellar Dislocation

Rest, Ice, Compression, Elevation. Anti-inflammatory medications. Physiotherapy.

Rehabilitation and Prevention Kneecap Subluxation or Patellar Dislocation

During rehabilitation, activities that do not aggravate the injury should be sought, such as swimming or cycling instead of running. Strengthening the vastus medialis and stretching the vastus lateralis will help correct the muscle imbalances that may cause this condition. A brace to hold the kneecap in place may be needed when initially returning to activity. To prevent subluxations it is important to keep the muscles surrounding the knee strong and flexible and avoid impact to the kneecap.

Long-term Prognosis and Surgery

Subluxations respond well to rest, rehabilitation, and anti-inflammatory measures. Rarely, surgery may be required to prevent recurring subluxations due to misalignment or loose support structures.

Joint Pain

Brief Outline of Knee Joint Dislocation

knee joint dislocation is a serious injury and quite often involves damage to a number of the structures of the knee, including ligaments, tendons, and menisci. There is also a chance that damage will occur to the vascular structures around the knee, which may require emergency surgery. Dislocation occurs when the top of the tibia (shin bone) is completely dislodged from the end of the femur (thigh bone). A dislocation of the knee joint is most commonly caused by a high impact injury, such as an automobile accident or a severe fall.

Cause of Knee Joint Dislocation

High impact to the knee or leg. Forceful twisting of the knee.

Complications if left Knee Joint Dislocation unattended

Dislocation of the knee joint causes tearing of the ligaments that hold the joint together. Dislocation results in gross instability and the knee joint becoming considerably more prone to successive dislocations and other injuries.

Immediate Treatment for Knee Joint Dislocation

Ice an immobilisation. Seek medical attention immediately.

Rehabilitation and prevention for Knee Joint Dislocation

During rehabilitation, activities that do not aggravate the injury should be sought, such as swimming and cycling instead of weight-bearing activities like running and walking. Stengthening the muscles around the knee will help to provide support. A knee brace may also be used to provide extra support when initially returning to activity.

Long-term prognosis and surgery for Knee Joint Dislocation

Even if the knee joint relocates without treatment, which is rare, there will still be significant damage to the soft tissues around the joint. In most cases the knee joint will need to be relocated by a physician or medical professional, and as damage to the soft tissues is always present with a knee dislocation, further surgery may be required to fix the soft tissue damage. Extensive rehabilitation is usually required after surgery.

Call (+65) 6471 2674 (24 Hour) to make an appointment to treat knee joint dislocation today.

knee-subluxation

Brief Outline of Subluxing Knee Cap

A subluxation or dislocation of the knee cap (patella) commonly occurs during deceleration. The knee cap slides partially out of the groove that is designed for it but does not limit mobility. Pain and swelling may accompany this condition. Athletes who has a muscle imbalance or a structural deformity, such as a high knee cap, have a higher chance of a subluxing knee cap.

Anatomy and Physiology of Subluxing Knee Cap

The patella is a small triangular sesamoid bone within the tendon of the quadriceps femoris muscle and forms the front of the knee joint. It is attached above to the quadriceps tendon, and below to the patellar (tendon) ligament, and articulates with the patellofemoral groove between the femoral condyles to form the patellofemoral joint. The patella slides over the groove when the knee flexes. If the outer muscle of the quadriceps, the vastus lateralis, is stronger than the inner muscle, the vastus medialis, this imbalance may cause an uneven pull on the knee cap forcing it out of the normal groove. In addition, the lateral femoral condyle and medial patellar bone may be bruised. This happens with forceful contractions such as planting, changing direction, or landing from a jump.

knee-subluxationCause of Subluxing Knee Cap

Strength imbalance between the outer quadriceps group and the inner group. Impact to the side of the knee cap. Twisting of the knee.

Signs and Symptoms of Subluxing Knee Cap

Feeling of pressure under the knee cap. Pain and swelling behind the knee cap. Pain when bending or straightening the knee.

Complications if Left Knee Cap Subluxation Unattended

Continued subluxations can cause small fractures in the patella, cartilage tears, and stress on the tendons. Failure to treat a subluxation could lead to chronic subluxations.

Immediate Treatment for Knee Cap Subluxation

R.I.C.E. Anti-inflammatory medication. Physiotherapy.

Rehabilitation and Prevention of Knee Cap Subluxation

During rehabilitation, activities that do not aggravate the injury should be sought, such as swimming or biking instead of running. Strengthening of the vastus medialis and stretching the vastus lateralis will help correct the muscle imbalance that may cause this condition. A brace to hold the knee cap in place may be needed when initially returning to activity. To prevent subluxations, it is important to keep the muscles surrounding the knee strong and flexible and avoid impact to the knee cap.

Long-term Prognosis for Knee Cap Subluxation

Subluxations respond well to rest, rehabilitation, and anti-inflammatory measures. Rarely surgery may be required to prevent recurring subluxations due to misalignment or loose support structures.

Call (+65) 6471 2674 (24 Hour) to see our orthopaedic specialist regarding your knee cap subluxation today.