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Knee Replacements
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Knee replacement is becoming more common, hips and knees are the most commonly replaced joints. In 2007, more than 938,000 hip or knee replacement surgeries were performed. The new joint, called a prosthesis, can be made of plastic, metal, or both. It may be cemented into place or uncemented. An uncemented prosthesis is designed so that bones will grow into it. |
First made available in the late 1950s, early total knee replacements did a poor job of mimicking the natural motion of the knee.
For that reason, these procedures resulted in high failure and complication rates. Advances in total knee replacement technology in the past 10 to 15 years have enhanced the design and fit of knee implants.
Total knee replacement is often the answer for people when x rays and other tests show joint damage; when moderate-to-severe, persistent pain does not improve adequately with nonsurgical treatment; and when the limited range of motion in their knee joint diminishes their quality of life.
In the past, patients between 60 and 75 years of age were considered to be the best candidates for total knee replacement. Over the past two decades, however, the age range has been broadened to include more patients older than 75, who are likely to have other health issues, and patients younger than 60, who are generally more physically active and whose implants will probably be exposed to greater mechanical stress.
About 90 percent of patients appear to experience rapid and substantial reduction in pain, feel better in general, and enjoy improved joint function. While most total knee replacement surgeries are successful, failure does occur and revision is sometimes necessary. Risk factors include being younger than 55 years old; being male; being obese; and having osteoarthritis or other illnesses.
Knee replacement surgery is removing a damaged knee and putting in a new one. A joint is where two or more bones come together, like the knee, hip, and shoulder.
The surgery is usually done by a doctor called an orthopaedic surgeon. Sometimes, the surgeon will not remove the whole joint, but will only replace or fix the damaged parts.
The doctor may suggest a joint knee replacement to improve how you live. Replacing a joint can help you relieve pain and move and feel better. Joints that can be replaced include the shoulders, fingers, ankles, and elbows. Hips and knees are replaced most often.
Knee Replacment is a common misspelling.
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