A surgeon has a choice between using cemented or uncemented joints in a joint replacement surgery such as hip, knee, or shoulder replacement surgery.
This decision can be made before the surgery, based on your age and X-rays. Or it can be made during the surgery, when your surgeon opens up the joint and can see how the joint looks. One type of joint is not clearly better than the other.
Cemented joints form an immediate, strong bond to the bone, but they often
loosen after 10 to 20 years. A cemented bond is strongest immediately after
surgery and gets weaker over time.
Uncemented joints form a bond
that may be weaker at first but may form a strong permanent bond as the bone
fills in the porous coating. After a strong bond has formed between the bone
and the replacement components, uncemented joints are less likely to weaken or
loosen over time. Most loosening that can be seen on an X-ray doesn't cause
symptoms and isn't a problem.
June 5, 2012
Anne C. Poinier, MD - Internal Medicine
& Stanford M. Shoor, MD - Rheumatology
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