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Knee Replacement

Deterioration of your joint and surrounding tissue can make it difficult to perform basic daily activities, even while you sit or lie down. As cartilage wears and bone rubs against bone, pain and reduced mobility follow. Knee replacement surgery can help relieve pain and restore function in diseased knee joints. During knee replacement, a surgeon cuts away damaged bone and cartilage from your thighbone, shinbone and kneecap and replaces it with an artificial joint made of metal alloys, high-grade plastics and polymers.
Why get a total knee replacement?

Knee replacement surgery is a treatment for pain and disability in the knee. Damage to the cartilage and bones limits movement and may cause pain. The most common condition that results in the need for knee replacement surgery is osteoarthritis. Forms of arthritis, such as rheumatoid arthritis and arthritis that results from a knee injury, may also lead to degeneration of the knee joint. Also, fractures, torn cartilage, and/or torn ligaments may lead to irreversible damage to the knee joint.
Surgery is often considered when medications, changes in activity level and walking supports are no longer helpful. By resurfacing your knee’s damaged and worn surfaces, total knee replacement surgery can relieve your pain, correct your leg deformity and help you resume your normal activities.
The goal of knee replacement surgery is to resurface the parts of the knee joint that have been damaged and to relieve knee pain that cannot be controlled by other treatments. Total knee replacement can lead to dramatic improvements in your quality of life and health. More than 90 percent of people who undergo total knee replacement surgery experience a significant reduction of knee pain and return to their normal daily activities.
  • Your pain persists or recurs over time
  • Your knee aches during and after exercise
  • You’re no longer as mobile as you’d like to be
  • Medication and using a cane aren’t delivering enough relief
  • Your knee stiffens up from sitting in a car or a movie theater
  • You feel pain in rainy weather
  • The pain prevents you from sleeping
  • You feel a decrease in knee motion or the degree to which you’re able to bend your knee
  • Your knees are stiff or swollen
  • You have difficulty walking or climbing stairs
  • You have difficulty getting in and out of chairs and bathtubs
  • You experience morning stiffness that typically lasts less than 30 minutes (as opposed to stiffness lasting longer than 45 minutes, a sign of an inflammatory condition called rheumatoid arthritis)
  • You feel a “grating” of your joint
  • You’ve had a previous injury to the anterior cruciate ligament (ACL) of your knee

There’s no exact formula for determining when you should have a knee replacement. But if you’re having trouble with everyday activities that involve your knee, you may be a candidate. A thorough examination by an orthopedic surgeon should give you an idea or recommendation.

Everyone heals from total knee replacement surgery at a different pace. In most cases, however, you will likely use a walker or crutches for 2 to 4 weeks after your operation. You will then advance to a cane and wean to no assistive device at all. You will gradually return to normal function without any assistive devices. In general, most patients are close to full recovery after 3 months.

Yes, physical therapy plays a very important role in your recovery. You should see a physical therapist soon after your operation and throughout your stay at the hospital. If you go home, you will likely need a therapist come to visit you or make appointments at a nearby physical therapy center. You should see a physical therapist about 2-3 times a week.

Most knees last more than 10–15 years. However, there is no guarantee. Five to ten percent of knee replacements may not last that long. A second replacement may be necessary.


NASA Bone & Joint is a Board Certified Orthopedic Center. Our two physicians, Dr. O’Neill and Dr. Monmouth are both board certified in general orthopedics. Dr. O’Neill is also certified in sports medicine. Both doctors trained at Harvard and have been practicing orthopedics in the Nassau Bay area for 25 years.

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Phone: 281-333-5114


Address: 16840 Buccaneer Suite 100 Houston, Texas 77058

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