Knee Replacement at the Orthopedic Surgeon

Do you really need a knee replacement?

Surgery is not the first step. A knee replacement is a big operation, and good surgeons treat it as a last resort after simpler treatments stop working. You are usually a candidate when daily life is limited and other care has run its course.

Surgeons look for a clear pattern:

• Pain that keeps you from walking, climbing stairs, or sleeping
• Stiffness or swelling that does not settle down
• Pain at rest, not just during activity
• An X-ray that shows the cartilage is mostly gone and bone is rubbing on bone
• Months of trying other care without enough relief

Before offering surgery, your doctor will want you to try the conservative options first. Those include weight loss if it applies, physical therapy to strengthen the muscles around the knee, anti-inflammatory medicine, a cane or brace, and sometimes steroid or gel injections. Most knee replacements happen because of osteoarthritis, the slow wearing away of cartilage. Injury, rheumatoid arthritis, and old fractures can also wreck a joint.

What happens during the surgery?

On the day of surgery you get anesthesia first. Many people have a spinal block, which numbs you from the waist down while you stay lightly sedated. Others have general anesthesia and sleep through it. Your team also numbs the nerves around the knee so you wake up more comfortable.

Here is the basic flow:

• The surgeon makes a cut down the front of your knee, usually 6 to 10 inches long.
• They move the kneecap aside to see the joint.
• They cut away the damaged ends of the thighbone and shinbone and trim the worn cartilage.
• They shape the bone to fit the implant precisely.
• They attach the metal pieces, often with bone cement, and set the plastic spacer between them.
• They check that the knee bends, straightens, and feels stable, then close the cut with stitches or staples.

The whole operation usually takes one to two hours. Some surgeons use computer guidance or a robotic arm to line up the cuts. These tools can improve precision, though a skilled surgeon gets good results with or without them. When it is done, you go to recovery and the staff start watching your pain and movement right away.

What does a knee replacement cost?

A knee replacement is one of the more expensive planned surgeries, but very few people pay the full sticker price. What you actually owe depends on your insurance.

Ranges cover the full episode: surgeon, facility, implant, and anesthesia. Ask for a written itemized estimate and check that both the surgeon and the facility are in your network.

For a full Medicare cost breakdown of the related surgical procedure, see our detailed cost guide.

Risks you need to know before you agree

Knee replacement works well for most people, but it is real surgery with real risks, and you deserve the honest list before you sign anything.

The main complications to know:

• Blood clots: clots in the leg or lung are the most watched risk. Your team will use blood thinners, compression sleeves, and early walking to prevent them. Call your doctor right away if a calf gets swollen, red, or painful, or if you feel short of breath.
• Infection: a deep infection around the implant is uncommon but serious and can mean more surgery. Watch for spreading redness, fever, or drainage from the cut.
• Stiffness: some people heal with a knee that does not bend far enough. Doing your physical therapy is the single best way to avoid this.
• Implant problems: parts can loosen or wear over many years and may need a redo.

Protect yourself with a few choices. Do not put off surgery so long that you lose strength and mobility you cannot get back, but do not rush into it before you have tried the conservative care your doctor recommends. Be honest about smoking, diabetes, and weight, because all three raise the risk of infection and slow healing. Avoid online cures and unproven injections that promise to regrow cartilage; none of them rebuild a bone-on-bone joint, and chasing them can cost you months. If your pain ever returns suddenly after a good recovery, or your knee gives out or feels hot and swollen, that is a red flag to call your surgeon, not to wait it out.

What is recovery really like?

Recovery is a gradual climb, not a single moment. You will stand and take a few steps with help the same day or the next, often with a walker. Many people go home within a day or two, and some go home the same afternoon.

What the timeline usually looks like:

• First two weeks: you manage pain with medicine, ice, and elevation. You walk a little more each day and start gentle exercises.
• Weeks two to six: physical therapy becomes the main job. You work on bending, straightening, and strength. Most people switch from a walker to a cane and then to walking on their own.
• Six weeks to three months: you return to most normal activities, including driving once your surgeon clears you.
• Three to six months: swelling fades, strength returns, and the knee starts to feel like yours again. Full recovery can take up to a year for the last bit of stamina.

How do you find a good knee surgeon near you?

The surgeon matters more than the hospital brochure. You want someone who does knee replacements often, because high-volume surgeons tend to have better results and fewer complications.

Things worth checking before you book:

• Specialty: look for an orthopedic surgeon, ideally one who focuses on joint replacement.
• Volume: ask how many knee replacements they do each year. More is generally better.
• Board certification: confirm they are board certified in orthopedic surgery.
• Hospital or center quality: ask about their infection and complication rates and whether they offer same-day discharge if that interests you.
• Network: make sure the surgeon and the facility are both in your insurance network so you are not surprised by an out-of-network bill.

When you meet, ask how many of their patients need a second surgery, what your specific recovery would look like, and whether you are a candidate for a partial replacement. A good surgeon answers plainly and does not pressure you. You can search our directory of orthopedic surgeons to find one near you and compare their training and location before you call.

How long does a new knee last?

A knee replacement is built to last a long time. Most modern implants are still working well 15 to 20 years after surgery, and many last even longer. Materials and surgical technique have improved, so younger patients today can often expect their first knee to last a couple of decades.

The results are strong. The large majority of people report much less pain and far better movement, and most say they would do it again. You should be able to walk, climb stairs, garden, and travel without the constant ache that sent you to surgery.

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Medical disclaimer: This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you have a medical emergency, call 911. Our editorial standards