How long will a total knee replacement last?

The longevity of a total knee replacement (TKR) depends on several factors, including the patient's age, activity level, weight, and the surgical technique used. On average, a TKR can last for 15 to 20 years before it may need to be revised. Some studies have reported success rates of over 90% at 10 years and 80% at 20 years.

Total knee replacements are most commonly performed on people with severe osteoarthritis, a degenerative joint disease that causes pain, stiffness, and swelling in the knee. Other conditions that may necessitate a TKR include rheumatoid arthritis, traumatic injuries, and certain bone tumors.

During a TKR, the damaged joint surfaces of the knee are removed and replaced with artificial components. These components are typically made of metal and plastic. The procedure is typically performed under general anesthesia and takes several hours.

After surgery, patients will typically remain in the hospital for a few days before being discharged to a rehabilitation facility. Physical therapy will be an important part of recovery, and most patients will be able to walk without assistance within a few weeks.

The success of a TKR depends on a number of factors, including:

* The patient's age. Younger patients are more likely to experience long-term success with a TKR than older patients.

* The patient's activity level. Patients who are very active may put more wear and tear on their TKRs, which could lead to earlier revision surgery.

* The patient's weight. Obese patients are more likely to experience problems with their TKRs, such as loosening of the components or wear and tear of the plastic inserts.

* The surgical technique used. The surgical technique used to perform the TKR can also affect its longevity. For example, minimally invasive surgical techniques have been shown to result in better outcomes than traditional open surgical techniques.