FROM OUR EXPERTS
The results of any one medical study can offer good information. But comparing the results of many studies is even more helpful. This is called meta-analysis . In this meta-analysis doctors compared the results of total knee replacements (TKRs) with and without patellar resurfacing. This means the bony kneecap is removed. It's replaced with a metal or plastic-backed implant. The authors asked these questions: Are there fewer cases of reoperation when the patella is resurfaced? How often does knee pain occur after each type of operation? What kind of knee function is possible? Ten studies including 1,223 knees had data that could answer these questions. Researchers used number of reoperations, knee pain, and function to measure results. They found there were fewer reoperations and less knee pain for patients with resurfaced patellae. Knee function seemed to be about the same in both groups.
Other studies show a higher number of reoperations over time for patients with resurfaced patellae. ...
In this year of Hillary and Sarah, it is interesting that gender issues in medicine are becoming important... and profitable.
In 2006, Zimmer, Inc. received clearance from the United States Food and Drug Administration to market an artificial knee that is gender-specific. This is based on studies that have focused on the anatomical differences between men and women. Specifically, men have been found to have an increase in the contact area where the knee cap meets the rest of the knee joint compared to women. And women appear to have a more narrow space when one looks at the inner and outer aspect of the knee.
Osteoarthritis of the knee is a major cause of chronic pain and disability, and the concern up to this point is that perhaps the orthopedic profession and its suppliers of artificial knees are doing a disservice to some patients by not taking into account the differences between a male knee and a female knee. All of us know patients who have chronic pain even af...
Human beings are well designed for many things. We have large brains for poetry and quantum mechanics; we are good long distance runners, and of course have these awesome opposable thumbs. Unfortunately, some parts are not designed very well for our 21st century lifestyles. The low back , or lumbar spine, is first on my list for sending back (or forward?) to the engineers. A close second though might be the " knee cap " or patellofemoral joint.
The "knee cap" or patella is an ovoid shaped bone whose main purpose is to act as a fulcrum that big muscle on the front of your thigh, the quadriceps. (I'll wait while you grab your high school physics book). There are plenty of folks who do not have patellae, but because this causes the quad muscle to work inefficiently, few of these folks can run or climb stairs well. The design issue with the patella is that it articulates, or rubs up against, the end of the femur bone (thus the "patellofemoral" joint). For those of us who have pa...
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