Definition

Osteotomy of the knee is surgery that involves making a cut in one of the bones in your lower leg. This can be done to relieve symptoms of arthritis by realigning your leg.

Alternative Names

Proximal tibial osteotomy; Lateral closing wedge osteotomy; High tibial osteotomy; Distal femoral osteotomy; Arthritis - osteotomy

Description

There are two types of surgery:

• Tibial osteotomy is surgery done on the shin bone below the knee cap.
• Femoral osteotomy is surgery done on the thigh bone above the knee cap.

During surgery:

• You will be pain-free during surgery. You may get spinal or epidural anesthesia, along with medicine to help you relax. You may also receive general anesthesia, in which you will be asleep.
• Your surgeon will make a 4 to 5 inch (in) or 10 to 13 centimeters (cm) cut on the area where the osteotomy is being done.
• The surgeon may remove a wedge of your shinbone or thighbone from underneath the healthy side of your knee. This is called a closing wedge osteotomy.
• The surgeon may also make a cut in the bone and open a wedge on the painful side of the knee. This is called an opening wedge osteotomy.
• Staples, screws, or plates may be used, depending on the type of osteotomy. This is called fixation.
• You may need a bone graft to fill in the wedge.

In most cases, the procedure will take 1 to 1 1/2 hours.

Why the Procedure Is Performed

Osteotomy of the knee is done to treat symptoms of knee arthritis or for instability. It is done when other treatments no longer offer relief.

Arthritis most often affects the inside part of the knee. Most of the time, the outside part of the knee is less affected unless you have had a knee injury in the past.

Osteotomy surgery works by shifting the weight away from the damaged part of your knee. For the surgery to be successful, the side of the knee to which the weight is being shifted should have little or no arthritis.

Risks

The risks for any anesthesia or surgery are:

• Allergic reactions to medicines
• Breathing problems
• Bleeding
• Infection

Other risks from this surgery include:

• Blood clot in the leg.
• Injury to a blood vessel or nerve.
• Infection in the knee joint.
• Knee stiffness or a knee joint that is not well-aligned.
• Stiffness in the knee.
• Failure of the fixation that requires more surgery.
• Failure of the osteotomy to heal. This may require more surgery or treatment.
• Pain from the plates and screws that were placed.

Before the Procedure

Tell your surgeon or nurse if:

• You are or could be pregnant
• You are taking any medicines, including medicines, drugs, supplements, or herbs you bought without a prescription
• You have been drinking a lot of alcohol, more than 1 or 2 drinks a day

Planning for your surgery:

• If you have diabetes, heart disease, or other medical conditions, your surgeon may ask you to see the provider who treats you for these conditions.
• If you smoke, it’s important to cut back or quit. Smoking can slow healing and increase the risk for blood clots. Ask your provider for help quitting smoking.
• If needed, prepare your home to make it easier to recover after surgery.
• Ask your surgeon if you need to arrange to have someone drive you home after your surgery.

During the week before your surgery:

• You may be asked to stop taking medicines that make it harder for your blood to clot. These medicines are called blood thinners. This includes over-the-counter medicines and supplements such as aspirin, ibuprofen (Advil, Motrin), naproxen (Naprosyn, Aleve), and vitamin E. Many prescription medicines are also blood thinners.
• Ask your surgeon which medicines you should still take on the day of your surgery.
• If you smoke, try to stop. Ask your health care provider for help. Smoking can slow down wound and bone healing.
• Let your surgeon know about any illness you may have before your surgery. This includes COVID-19, a cold, flu, fever, herpes outbreak, or other illness. If you do get sick, your surgery may need to be postponed.

On the day of your surgery:

• Follow instructions about when to stop eating and drinking.
• Take the medicines your surgeon told you to take with a small sip of water.
• Follow instructions on when to arrive at the hospital. Be sure to arrive on time.

After the Procedure

By having an osteotomy, you may be able to delay the need for a knee replacement for up to 10 years, but still stay active with your own knee joint.

A tibial osteotomy may make you look "knock-kneed." A femoral osteotomy may make you look "bow legged."

Outlook (Prognosis)

You will be fitted with a brace to limit how much you're able to move your knee during the recovery period. The brace may also help hold your knee in the correct position.

You will need to use crutches for 6 weeks or more. At first, you may be asked to not place any weight on your knee. Ask your surgeon when it will be OK to walk with weight on your leg that had the surgery. You will see a physical therapist to help you with an exercise program.

Complete recovery may take several months to a year.

References

Crenshaw AH. Soft- tissue procedures and osteotomies about the knee. In: Azar FM, Beaty JH, eds. Campbell's Operative Orthopaedics. 14th ed. Philadelphia, PA: Elsevier; 2021:chap 9.

Feldman A, Gonzalez-Lomas G, Swensen SJ, Kaplan DJ. Osteotomies about the knee. In: Scott WN, ed. Insall & Scott Surgery of the Knee. 6th ed. Philadelphia, PA: Elsevier; 2018:chap 121.

Phillips MJ, Nodzo SR. Patient considerations: comorbidities and optimization. In: Mihalko WM, Mont MA, Krackow KA, eds. Technique of Total Knee Arthroplasty. 2nd ed. Philadelphia, PA: Elsevier; 2023:chap 1.