What is a total knee replacement?

A total knee replacement is similar to a total hip replacement in that the surgeon replaces the arthritic cartilage in the knee with metal (both on the femur and the tibia).  A piece of plastic sits between the two metal ends to act as the new smooth cartilage.  The under-surface of the patella (kneecap) can be replaced by a piece of plastic as well. 

​​​

When should I have a total knee replacement?

After an evaluation by Dr. Waddell, he will tell you when you meet the criteria for a total knee replacement based on your symptoms, history, physical and imaging studies.  Once you discuss all the possible treatment options with Dr. Waddell, you will get to decide which treatment option is best for you.  Deciding when to have a total knee replacement usually comes down to how often your pain is affecting you and whether you have tried non-operative therapies.  In general, when you have more bad days than good days, when your pain is keeping you from your daily activities, and when all non-operative treatments have failed, it is time to consider total knee replacement.

​​

What can I expect after my knee replacement?

After a total knee replacement, most patients can expect to return to an active lifestyle. 

​

Most patients will walk with the aid of crutches, a walker or a cane for the first 1-2 weeks.  On average, patients return to normal function within a few weeks to months. Physical therapy and patient-led exercises will be necessary to achieve the best outcome after your total knee replacement.

​

How long will my knee replacement last?

Based on studies performed over many years, we expect most knee replacements to last 15-25 years. Improvements in the parts used for the replacement and improvements in the ability to accurately place the components will likely lead to longer survivor-ship of the implants.

 

Am I too young for total knee replacement?

Similar to the hip, receiving a total joint replacement at a young age typically meant a subsequent surgery later in life would be necessary. While this is still possible, it is more likely that joint replacements will last much longer then previously thought. Joint replacements today benefit from advanced materials and approaches, which can allow young active patients to return to their activities with little to no pain.