Orthopaedic Innovation

Kneecap (patella) instability: causes, symptoms & treatment options

Proven, trusted Orthopaedic surgery to get you back to living your life sooner

What is a kneecap instability?

Patella instability happens when the kneecap moves out of place, often due to weak muscles, a previous injury, or abnormal bone structure. This can lead to dislocations (when the kneecap completely shifts out of its normal position) and ongoing knee pain.

What causes patella instability?

Previous dislocations

A past injury can make the kneecap more likely to slip out again.

Weak or tight muscles

Poor muscle support can affect knee stability.

Abnormal bone structure

Some people are born with a shallow groove in the thigh bone, making dislocation more likely.

Common symptoms of kneecap fracture

  • Kneecap shifting out of place (dislocation or partial dislocation)
  • Pain and swelling
  • Feeling like the knee might "give way"
  • Clicking or locking sensation

Diagnosis of patella instability

A doctor will diagnose a patella instability using:

Physical examination

Checking knee movement and alignment.

X-rays or MRI scan

To see bone alignment and soft tissue damage.

Treatment options

Non-surgical treatments of kneecap instability

Knee bracing

Helps keep the kneecap in place.

Pain relief & ice therapy

Reduces swelling and discomfort.

Strengthening exercises

Physiotherapy to improve muscle support around the knee.

Adipose tissue therapy

Uses fat-derived stem cells to promote ligament healing, reduce inflammation, and support cartilage repair, helping to improve knee stability.

Surgical treatment of kneecap instability

For severe or repeated dislocations:

MPFL reconstruction (ligament repair)

Strengthens the ligament that holds the kneecap in place.

Tibial tubercle osteotomy (bone realignment surgery)

Moves the kneecap into a better position to prevent further dislocations.

Recovery & rehabilitation

Mild cases

Strengthening exercises and bracing may resolve the problem in a few months.

Surgical cases

Full recovery can take 3-6 months, including physiotherapy.

When to see a specialist for your kneecap instability

If your kneecap keeps moving out of place or you feel unstable when walking, seek an assessment to prevent further damage.

Meet your knee specialists

Prof. Adrian Wilson - world-renowned specialist orthopaedic surgeon

Prof. Adrian Wilson

At Orthopaedic Innovation, our world leading surgical team offers a range of treatment options for people experiencing patella instability.
Locations

The Harley Street Hospital,
19 Harley Street,
London, W1G 9QJ
The Cromwell Hospital,
164-178 Cromwell Road,
London SW5 0TU
The London Independent Hospital,
1 Beaumont Square,
London E1 4NL
Medical disclaimer
The information provided on this website is for informational purposes only and should not be considered medical advice. It is not intended to replace consultation with a qualified healthcare professional. While we strive to provide accurate and up-to-date information, medical knowledge is constantly evolving, and individual cases may vary. Any surgical or non-surgical treatments discussed on this website should be considered in consultation with a medical professional who can assess your individual needs and medical history.
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