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A Medical Mystery: Artificial Hips that Squeak
International Herald Tribune ^ | 5/11/2008 | Barnaby J. Feder

Posted on 05/15/2008 8:45:54 AM PDT by Dr. Scarpetta

The first time John Johnson's artificial hip squeaked, he was bending down to pick up a pine cone in his yard in Thomasville, Georgia. Johnson looked up, expecting to find an animal nearby.

Susan O'Toole, a nutritionist at Montefiore Medical Center in New York, who first squeaked going up stairs after getting home from her hip-replacement surgery in 2005, said she thought the banister she was gripping needed repair.

And Edward Heary, an apprentice appraiser in Hatboro, Pennsylvania, said clients sometimes look with embarrassment or concern at their floorboards when he walks though their homes.

As those three patients - and hundreds of others - discovered once they pinpointed the source of the noise, they had become guinea pigs in an unfolding medical mystery.

Their artificial hips are made of CERAMIC materials that were promoted as being much more durable than older models. But for reasons not yet fully understood, their hips started to squeak, raising questions about whether the noises herald more serious malfunctions.

"There is something amiss here," said Douglas Padgett, chief of adult reconstructive and joint replacement service at the Hospital for Special Surgery in New York.

(Excerpt) Read more at iht.com ...


TOPICS: News/Current Events
KEYWORDS: artificialjoints; health; medicine
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To: Dr. Scarpetta
I had a total hip replacement 5 years ago.The shaft is titanium,the ball is ceramic and the socket is polyethylene.

So far,so good. In fact,most of the time I forget I have a replacement.

Six months or so after the hip I had four discs removed and replaced by ceramic coated titanium discs and the whole thing filled with morphogenic surgical protein,which after electro-magnetic field stimulation over a period of time turned into bone.

Voila! No more pain after thirty years of it.My wife says my grumpiness has diminished too.

No squeaks from my body!

21 posted on 05/15/2008 11:02:23 AM PDT by oldsalt (There's no such thing as a free lunch.)
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To: jacquej

Ping to Post #20


22 posted on 05/15/2008 12:04:31 PM PDT by LSAggie
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To: LSAggie

INjecting some kind of bioabsorbable neutral lubricant similar to whale oil under floroscopy might work.


23 posted on 05/15/2008 12:41:31 PM PDT by nikos1121 (Thank you, Jimmy Carter for all you've done to make the world a safer place.)
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To: nikos1121

Something like that might work. My doc said it only takes lubricant “microns thick” to be effective —

PJ


24 posted on 05/15/2008 12:45:35 PM PDT by duckbutt (Those who pay no taxes have no check on their appetite for services.)
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To: Kimmers
I know an orthopedist that wrote an article 10 years ago that ceramic hips and knees are not any good and should not be used in implants.

Maybe he knew what he was talking about...

25 posted on 05/15/2008 2:19:34 PM PDT by Dr. Scarpetta
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To: oldsalt
I had a total hip replacement 5 years ago.The shaft is titanium,the ball is ceramic and the socket is polyethylene. So far,so good. In fact,most of the time I forget I have a replacement. Six months or so after the hip I had four discs removed and replaced by ceramic coated titanium discs and the whole thing filled with morphogenic surgical protein,which after electro-magnetic field stimulation over a period of time turned into bone. Voila! No more pain after thirty years of it.My wife says my grumpiness has diminished too. No squeaks from my body! .

Glad to hear you're doing so well!

26 posted on 05/15/2008 2:21:51 PM PDT by Dr. Scarpetta
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To: Dr. Scarpetta

OK, I am not involved in research but common sense says to me if the device is squeaking that means friction and friction causes wear and ultimately device failure and another surgery.....


27 posted on 05/15/2008 2:33:08 PM PDT by Kimmers
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To: Kimmers
No squeaks occurred among a control group of 48 patients who received hips made of metal and plastic.Beyond annoyance and embarrassment, many patients and their surgeons fear that the squeaky ceramic hips may signal that the joints are wearing out prematurely.

That could force patients to undergo the very operation - a second replacement of the same hip joint - they had hoped to avoid by choosing ceramics.

If the public becomes educated, maybe they will be able to make a more informed choice before surgery...

28 posted on 05/15/2008 2:39:44 PM PDT by Dr. Scarpetta
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To: Dr. Scarpetta

bump


29 posted on 05/15/2008 2:42:52 PM PDT by tom paine 2
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