Knee Replacement Longevity and Revision Surgery for Seniors

Artificial knee joint

Hello, my mother-in-law had bilateral knee arthroplasties 10 years ago, and she has been experiencing significant pain recently.
I would like to ask the doctor...
What is the lifespan of a prosthetic joint, and at the age of 75, is it possible for her to undergo a second knee replacement?

Weifeng, 40~49 year old female. Ask Date: 2015/07/13

Dr. Shi Guozheng reply Orthopedics

Artificial knee joints have a certain lifespan, typically exceeding ten years, after which they may become unstable, wear out, or loosen.
If pain persists, it is possible that the artificial joint is damaged, and it is necessary to consult a physician to assess whether any of these conditions are present.
A revision surgery, also known as revision total knee arthroplasty, may be required.
Being 75 years old is not a contraindication; as long as the individual is in good health without any significant comorbidities, they can consult an expert in artificial knee joint replacement regarding the success rate of a subsequent surgery, which is generally over 80-90%.

Reply Date: 2015/07/13

More Info

Knee replacement surgery is a common procedure, especially among seniors, and understanding the longevity of artificial joints and the potential need for revision surgery is crucial for patients and their families. In your case, your grandmother had bilateral knee replacements ten years ago and is now experiencing pain, which raises important questions about the durability of her artificial joints and the possibility of a second surgery.

1. Longevity of Artificial Knees: Generally, artificial knee joints are designed to last between 15 to 20 years, depending on several factors including the patient's age, activity level, weight, and overall health. Some patients may experience longer-lasting results, while others may face issues sooner. The materials used in knee implants have improved over the years, which has contributed to increased longevity. However, wear and tear can still occur, especially in active individuals or those who may have other underlying health issues.

2. Signs of Wear and Need for Revision: If your grandmother is experiencing significant pain, it could be a sign that the artificial joint is wearing out or that there may be other complications such as loosening of the implant, infection, or even issues with surrounding tissues. A thorough evaluation by an orthopedic surgeon is necessary to determine the cause of her pain. This typically involves a physical examination and imaging studies such as X-rays or MRIs to assess the condition of the artificial joint.

3. Revision Surgery: At 75 years old, your grandmother is certainly a candidate for revision surgery if it is deemed necessary. Age alone is not a disqualifying factor for surgery; rather, her overall health, mobility, and the severity of her symptoms will be considered. Revision knee surgery is more complex than the initial replacement due to the changes in bone and soft tissue that occur over time. However, many patients in their 70s and 80s successfully undergo revision surgeries and experience significant improvements in their quality of life.

4. Post-Surgery Expectations: After a revision surgery, patients can expect a rehabilitation process similar to that of the initial knee replacement. Physical therapy will be crucial to regain strength and mobility. While some patients may achieve near-normal function, it is important to set realistic expectations. Activities that place excessive stress on the knee, such as running or high-impact sports, may still be limited.

5. Consultation with an Orthopedic Specialist: Given your grandmother's situation, it is essential to consult with an orthopedic specialist who can provide a comprehensive assessment and discuss the best course of action. They can explain the risks and benefits of revision surgery, alternative treatments, and what to expect during recovery.

In conclusion, while artificial knee joints have a finite lifespan, many factors influence their longevity. If your grandmother is experiencing pain, it is crucial to seek medical advice to determine whether a revision is necessary. With appropriate care and intervention, many seniors can continue to lead active and fulfilling lives post-surgery.

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