Knee Dislocation

Knee Dislocation

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Knee Dislocation

Knee

What is Knee Dislocation?

Knee dislocation also known as Patella Dislocation, is a condition in which the patella (kneecap) is displaced from its normal position. This can occur when there is a sudden trauma to the knee joint, such as a fall or pushing off with the foot during a sports activity.

What is Multiligament Knee Dislocation?

Multiligament knee dislocations are a type of knee injury that involves the rupture of two or more ligaments. The most common ligaments to be torn in this way are the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), and medial collateral ligament (MCL). This type of injury is also known as a “bucket handle tear” because of the shape of the damaged ligaments.

What are the types of Knee Dislocation?

The knee joint has three compartments: medial, lateral and patellofemoral. A dislocated patella will most likely be in one of these compartments. The medial compartment is under the quadriceps muscle and over the tibia (shinbone). The lateral compartment is under the quadriceps muscle on the outer part of your thigh. The patellofemoral compartment is under your kneecap.

There are five main types of knee dislocations: anterior, posterior, medial, lateral, and rotary.

Anterior knee dislocations are the most common type of knee dislocation. The knee cap is dislocated forward and away from the thigh bone.

Posterior knee dislocations occur when the lower leg bone comes out behind the upper leg bone. This type of dislocation may be difficult to diagnose because it can cause damage to the nerves and blood vessels in the back of your leg.

Medial knee dislocations occur when your kneecap moves inward toward your other knee. This happens when your thighbone slides backward and your kneecap moves forward at a steep angle toward your shinbone (tibia).

Lateral knee dislocations occur when your kneecap moves outward toward the side of your leg. It can also result in damage to your nerves and blood vessels on that side of your lower leg.

Rotary knee dislocations occur when both knees are dislocated backward at nearly 90° angles from each other, which causes severe damage to the ligaments around both knees.”

What are the causes of Knee Dislocation?

Knee dislocation, or knee subluxation, is a condition in which the knee joint becomes unstable, causing it to move out of its normal position.

The causes of knee dislocation can include:

  • Trauma, such as falling onto your knee or being hit by an object;
  • Sudden movements like running or jumping;
  • Injury to the ligaments that support the knee;
  • An injury to the cartilage (the tissue that covers bone ends and cushions joints);
  • Knee arthritis (a degenerative disease of the joints); and
  • Knee injuries that cause swelling and inflammation.

What are the symptoms of Knee Dislocation?

The symptoms of knee dislocation are:

  • A popping or cracking sound when the injury occurs
  • Tearing of the ligaments
  • Pain and swelling around the joint, which may spread to other areas of your body, such as your thigh and calf
  • Bruising around the joint
  • Loss of function in the leg

What are the risk factors of Knee Dislocation?

The most common risk factor for knee dislocation is previous knee injury. The more severe the previous injury and the more force involved in the injury, the higher your risk of future knee dislocation.

Other factors that can increase your risk for knee dislocations include:

  • Older age
  • Previous knee injury
  • Previous hip or leg surgery
  • Hip replacement
  • Leg length discrepancy (when one leg has a longer lower leg bone than the other)
  • Jumping or landing from high places
  • Having an abnormally shaped or weak kneecap (patella) that doesn’t provide adequate stability for the knee joint during movement; this is called patellofemoral dysplasia (PFDS)
  • Having flat feet that causes your knees to sink into the ground when you walk; this is called pes planus

How to prevent Knee Dislocation?

You can prevent knee dislocation by following these steps:

  • Wear properly fitting shoes with good support and cushioning.
  • Exercise regularly to keep your joints strong and flexible.
  • Avoid high-impact sports like football or basketball if you have weak knees or past injuries.

Recommended Exercise

Knee

What are the treatments for Knee Dislocation?

The treatments for knee dislocation vary depending on the severity of the injury and the condition of your overall health.

It may include rest, anti-inflammatory medications, ice packs, physical therapy, bracing and surgery if necessary.

What are the exercises for Knee Dislocation?

Knee dislocation exercises are typically done to strengthen the muscles around the anterior, medial, and posterior areas of your knee joint. The exercises for knee dislocation include:

Quad sets

These are a great way to strengthen your quadriceps and other muscles in the leg. Do 10-15 reps at a time and repeat 3 times a day.

Standing hamstring stretch

This helps improve flexibility in your hamstrings, which is key for preventing knee dislocations from occurring again in the future. Hold for 15 seconds and repeat 10 times every day for about two weeks after injury occurs.

Wall slide

This exercise helps improve balance and prevent falls so that you don’t end up injuring yourself again! Stand with feet shoulder width apart and perform 20-30 reps every day until symptoms subside.

Explanation of Recommended Orthotic Device

Knee

What type of brace is used for Knee Dislocation?

The best knee dislocation brace is a patellar dislocation brace. This type of brace provides support for the patella (kneecap) and helps to reduce pressure on the knee joint. The brace also prevents hyperextension of the knee, which can cause further damage to the ligaments around your knee.

There are two types of patellar dislocation braces: soft-shell and hard-shell.

  • The soft-shell brace is made of plastic or neoprene and has no metal parts that could irritate your skin.
  • The hard-shell brace is made of metal and plastic, and it can be adjusted for a custom fit.
  • Both types of patellar dislocation braces offer some stability for your knee while you’re healing from the injury.

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