How long does an artificial knee joint last?

An artificial knee joint typically lasts between 15 and 20 years. After this period, the artificial components may begin to wear down or become loose, which might necessitate another surgery on the same knee to replace the joint again [1].

The duration for which an artificial knee joint lasts depends on several factors, including the person's activity level after surgery, their age, and their overall health. It is important to understand these factors to make an informed decision regarding knee replacement surgery.

Factors Affecting the Lifespan of an Artificial Joint

There are several factors that can affect how long an artificial knee joint lasts. One of the most prominent is the person's level of physical activity. People who engage in activities that place significant strain on the knee may experience faster wear and tear of the artificial joint [2]. For example, high-impact activities such as running and jumping can increase pressure on the new joint, whereas low-impact activities like walking, cycling, and swimming are better for protecting the joint [1].

Additionally, age plays a significant role. Although knee replacement surgery is common among older adults, many younger people also undergo it. Younger and more active individuals may require revision surgery (a second surgery) sooner than less active older adults [2].

Maintaining an Artificial Knee Joint

To help extend the life of an artificial knee joint, there are some measures that can be taken. One of the most important is maintaining a healthy weight. Excess weight increases pressure on the knee joint, which can lead to faster wear and tear [1]. Also, engaging in regular physical activity, while avoiding high-impact activities, helps strengthen the muscles surrounding the knee and supports the joint without straining it [1].

It is also essential to follow the instructions of your doctor and physical therapist after surgery. This includes performing recommended exercises regularly to strengthen the knee and improve its flexibility. Adhering to these instructions can significantly impact the success of the surgery and the longevity of the joint [1].

When Might You Need Revision Surgery?

If the artificial components of the knee joint begin to wear down or become loose after 15 to 20 years, you may need revision surgery. This surgery aims to replace the worn-out parts with new ones [1]. It is important to note that a second surgery may not be as effective as the first [2].

If you are experiencing increasing pain in the replaced knee, difficulty with movement, or any other signs indicating a problem with the artificial joint, you should consult your doctor immediately. The doctor can evaluate the condition of the joint and determine if there is a need for revision surgery or any other intervention.

Medical Consultation and Decision Making

The decision to undergo knee replacement surgery, or revision surgery, is a personal one that depends on your overall health, the level of pain you are experiencing, and its impact on your daily life [1]. It is important to discuss all potential risks and benefits with your doctor [1]. Together, you can determine if knee replacement surgery is the right option for you.

For more information about knee replacement surgery, when it is necessary, and what to expect, you can visit Knee Replacement: When is Surgery Necessary and What to Expect? (Arabic).

Medical references

• Knee Replacement
• Deciding to have knee or hip replacement