Comprehensive Care

When a prosthetic knee loosens over time, it may require a surgical procedure to repair the damage. At MedStar Orthopaedic Institute, our experienced knee surgeons perform thousands of surgeries each year, including knee revision surgery. We pride ourselves on offering the least invasive surgical options to allow you to recover quickly from surgery and return to your regular life faster. Our surgeons take the time to explain your unique condition and walk you through your treatment from beginning to end. Our specialists will always encourage non-surgical options when possible and recommend surgical options only when necessary.

What is a loose knee prosthesis?

Knee replacement failure refers to loosening or damage to an artificial knee after undergoing total knee replacement surgery. Loosening of the knee prosthesis can cause a great deal of pain and lower the range of motion in the knee. Often, loosened knee implants require a secondary revision surgery to repair or replace portions of the knee to restore your range of motion and improve knee stability.

What are the causes?

There are a number of reasons a knee replacement can fail or loosen, including:

  • Improper fit during original procedure
  • Wearing out over time
  • Damage to the bone that surrounds the implant

What are the symptoms ?

It is important to visit an orthopedic specialist if you are suffering from any of these common symptoms of a loosened prosthetic knee:

  • Knee pain
  • “Loose” or unstable feeling in the knee
  • Loss of range of motion
  • Inability to balance
  • Inability to put full weight on the knee

How is it diagnosed?

At the first signs of a loose prosthesis, it is important to speak with a knee replacement specialist. MedStar Orthopaedic Institute is home to experts in a wide range of knee conditions who have years of experience diagnosing and treating failed knee replacements. A knee exam with one of our physicians will likely include the following:

  • Medical history evaluation – One of our physicians will go over your medical history and symptoms.
  • Physical exam – We will evaluate the knee area and may ask you questions about your pain level.
  • Imaging tests – We may also need to conduct imaging tests to further evaluate any knee damage.


If you believe you may be suffering from a loosened knee prosthesis, call 202-295-0511 to schedule a consultation with one of our orthopedic specialists at MedStar Orthopaedic Institute. Our doctors have years of experience diagnosing and treating hip and knee conditions and are pleased to offer comprehensive knee care in the Washington, D.C. area.

Our Specialists

Hip & Knee Replacement

Brian George Evans, MD
Brian George Evans, MD
Joint Replacement (Hip & Knee)

MedStar Georgetown University Hospital
MedStar Orthopaedic Institute – McLean
William C. Lennen, MD
William C. Lennen, MD
Joint Replacement (Hip & Knee)
PhonePhone: 240-434-7483

MedStar St. Mary’s Hospital
Ahamefula E. Onyike, MD
Ahamefula E. Onyike, MD
Joint Replacement (Hip & Knee)
PhonePhone: 866-767-1682

MedStar Orthopaedic Institute – Brandywine
MedStar Orthopaedic Institute – Waldorf
MedStar Southern Maryland Hospital Center
Kenneth M. Vaz, MD
Kenneth M. Vaz, MD
Joint Replacement (Hip & Knee)
PhonePhone: 202-444-8766

MedStar Georgetown University Hospital


3800 Reservoir Road Northwest Washington, DC, 20007
Phone: 202-444-8766
18109 Prince Philip Drive, Suite 325 Olney, MD, 20832
Phone: 301-774-8958
25500 Point Lookout Road, Suite 250 Leonardtown, MD, 20650
Phone: 240-434-7483
106 Irving Street Northwest, Washington, DC, 20010
Phone: 202-877-6000
1120 20th Street Northwest, Building 1 South Washington, DC, 20036
Phone: 202-416-2000
3305 North Leisure World Boulevard Silver Spring, MD, 20906
Phone: 301-774-8958
6858 Old Dominion Drive, Suite 200 Mc Lean, VA, 22101
Phone: 202-444-8766