Patellar Discolation

Your kneecap, known as the patella, typically sits within a shallow groove at the end of your thighbone (femur). This anatomical design allows the patella to glide smoothly as you bend and extend your knee. A patellar dislocation occurs when this bone slips partially or entirely out of its proper track.

This injury can be caused by sudden trauma—such as a direct blow or a fall—or it may result from underlying structural vulnerabilities in the knee joint. Even if the kneecap pops back into place on its own, it is crucial to seek a medical evaluation to assess for swelling, pain, and potential damage to the surrounding ligaments and tissues.

What Causes a Patellar Dislocation?

A dislocation of the patella is often the result of a combination of traumatic events and biomechanical or structural predispositions, such as:

• An uneven or shallow trochlear groove in the femur
• Hypermobility or laxity in the ligaments that stabilize the joint
• Weakness or imbalance in the muscles surrounding the knee
• High-impact activities, falls, or direct impacts during sports
• Sudden pivoting movements, particularly when the foot is planted firmly on the ground

It is important to note that even individuals with standard knee anatomy can suffer a dislocation during an awkward landing or a sudden change in direction.

What are Symptoms of Patellar Dislocation?

When the kneecap dislocates, you may experience several of the following symptoms:

• Intense pain localized around the patella
• Significant swelling throughout the knee joint
• A feeling that the kneecap is sliding or shifting out of position
• The sensation of the knee buckling or “giving way”
• An audible popping sound at the moment the injury occurs
• A visible deformity or an unusual appearance of the knee
• Anxiety or apprehension when attempting to run, bend the knee, or pivot

How is Patellar Dislocation or Knee Instability Diagnosed?

To reach a diagnosis, a specialist will begin by reviewing the circumstances of the injury and asking detailed questions about your symptoms. A physical examination follows, where the provider checks for tenderness, swelling, joint alignment, and the knee’s overall range of motion. To further evaluate the integrity of the ligaments, cartilage, and bone structure, imaging tests such as MRI scans or X-rays may be ordered.

How is Dislocation of the Kneecap Treated?

The approach to treatment depends on several factors: whether the kneecap has already returned to its proper position, the severity of any soft tissue damage, and the likelihood that the dislocation will happen again.

Immediate Care

• Emergency Intervention: If your kneecap is currently dislocated and has not returned to place, please go to the emergency room immediately.
• Reduction: A physician may provide pain management and carefully guide the patella back into its correct alignment (a process called reduction).

Nonsurgical Treatment

Many patients who experience a first-time dislocation can recover without surgical intervention:

• Immobilization: To stabilize the joint, a brace may be worn for several weeks.
• Weightbearing Support: Crutches are often used in the early stages of healing to protect the knee and minimize pain.
• Physical Therapy: Targeted exercises to strengthen the quadriceps and supporting muscles are essential for restoring stability and function.
• Recovery Timeline: Depending on the severity of the injury, most patients can return to their usual activities within 6 to 8 weeks.

To prevent future episodes, we recommend ongoing strengthening programs and low-impact activities, such as cycling.

Patellar Dislocation Surgery

Surgery is typically considered if the kneecap continues to dislocate (chronic instability), if bracing and therapy fail to stabilize the joint, or if there are significant structural abnormalities.

Surgical interventions may include:

• Ligament Reconstruction: Stabilizing or repairing the ligaments that keep the patella in its track.
• Knee Scope: A minimally invasive procedure performed through small incisions.
• Complex Reconstruction: More extensive surgery to address significant alignment or bone issues.

Return to Activity

You can typically return to your daily routine once your range of motion and muscle strength have been fully restored. Those participating in high-demand sports may require a more extended recovery period, as regaining confidence in the stability of the knee is vital for a safe return. For those undergoing surgical repair, the typical window for returning to competitive athletics is usually 2 to 3 months.

Treat Patellar Dislocations at Fox Valley Orthopedics

If you are dealing with knee instability or have recently suffered a patellar dislocation, the team at Fox Valley Orthopedics is ready to help. We are committed to understanding your specific symptoms and providing a supportive environment to guide you toward the most effective recovery plan. Our goal is to reduce your pain and restore your quality of life through expert care.

Call today to make your appointment: (855) FVORTHO | (855) 386-7846.