Knee arthrodesis is a procedure that fuses the thigh bone to the lower leg bone at the knee. The joined bones may be secured with plates and screws. This method of support is called internal fixation. It provides support while the bones fuse together.
The knee will no longer be able to bend after this surgery.
Knee arthrodesis may only be done if all other repair methods are not appropriate or have failed. It may be done:
Joint Damage Due to Arthritis
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Arthrodesis may reduce pain and improve overall function. However, it will prevent bending at the knee and will cause a limp.
Your doctor will review a list of possible complications, which may include:
Factors that may increase the risk of problems include:
Make sure you talk to your doctor about these risks before your procedure.
Your doctor may do the following before your procedure:
Before surgery, you will need to:
You may need to stop taking some medications up to 1 week before the procedure.
Do not eat or drink anything after midnight the day before your surgery, unless told otherwise by your doctor.
General anesthesia will be used. You will be asleep during the surgery.
An incision will be made over the knee. A small amount of bone from the ends of the thigh bone and top of the lower leg bone will be removed. Other knee joint structures like cartilage and ligaments or knee replacements will be removed. The ends of the bones will be joined together, usually with a bone graft. Metal plates will be screwed into the joined bones.
The incision will be closed. A bandage may be placed over the incision.
About 2 hours
Anesthesia will block pain during the procedure. You will have pain after the procedure. Ask your doctor about medication to help manage pain.
The usual length of stay is about 3-4 days. It is possible that you may have to stay longer if complications arise. You may also go to a rehabilitation hospital to help you recover.
Right after the procedure, you may be given medication such as:
Physical therapy often starts within 24 hours after your surgery. During this time you may need devices to help you walk.
You will be able to leave when you are able to get around and do basic daily care activities on your own.
When you return home, take these steps:
Call your doctor if any of these occur:
If you have an emergency, call for emergency medical services right away.
OrthoInfo—American Academy of Orthopaedic Surgeons
The Arthritis Society
Canadian Orthopaedic Association
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Talmo CT, Bono JV, et al. Intramedullary Arthrodesis of the Knee in the Treatment of Sepsis after TKR. HSS J. 2007;3(1):83-88.
Last reviewed March 2015 by Michael Woods, MD Last Updated: 6/24/2013