dental gold?

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dental gold? Grant Erwin 08-05-2008
Posted by Grant Erwin on August 5, 2008, 6:11 pm
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 I had a tooth extracted today. It had been crowned with gold. They gave me
back the gold crown, tooth still in it of course.

I seem to recall hearing that Coca-Cola actually dissolves teeth. Is that
a workable solution to removing the old tooth from the gold crown? Is
there a better one?

Grant

Posted by Doug White on August 5, 2008, 6:28 pm
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 wrote:
>I had a tooth extracted today. It had been crowned with gold. They gave me
>back the gold crown, tooth still in it of course.
>
>I seem to recall hearing that Coca-Cola actually dissolves teeth. Is that
>a workable solution to removing the old tooth from the gold crown? Is
>there a better one?

The coke doesn't work. I am in the same boat, and it barely touched the
tooth (if at all) before it went moldy.

Still looking for a good approach...

Doug White

Posted by Grunty Grogan on August 5, 2008, 8:17 pm
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On Tue, 05 Aug 2008 22:28:14 GMT, gwhite@alum.mit.edu (Doug White)
wrote:

>The coke doesn't work. I am in the same boat, and it barely touched the
>tooth (if at all) before it went moldy.
>
>Still looking for a good approach...

Dilute HCl, .1 N dissolves Hydroxyapatite. In the absence of nitrate,
this will not dissolve the gold, though it may extract alloying metals
such as copper from the surface, leaving a frosty surface.
You can speed this up in a beaker floating in an ultrasonic cleaner.
This cavitates the organic materials as well as speeding up the
dissolution of the HA.

Coke will not work because it is a very dilute solution of phosphoric
acid, which gave rise to stories about it removing rust from bumpers.

HA can be prepared from H3PO4 and CaOH2 .


Posted by DrollTroll on August 6, 2008, 2:20 am
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> On Tue, 05 Aug 2008 22:28:14 GMT, gwhite@alum.mit.edu (Doug White)
> wrote:
>
>>The coke doesn't work. I am in the same boat, and it barely touched the
>>tooth (if at all) before it went moldy.
>>
>>Still looking for a good approach...
>
> Dilute HCl, .1 N dissolves Hydroxyapatite. In the absence of nitrate,
> this will not dissolve the gold, though it may extract alloying metals
> such as copper from the surface, leaving a frosty surface.
> You can speed this up in a beaker floating in an ultrasonic cleaner.
> This cavitates the organic materials as well as speeding up the
> dissolution of the HA.
>
> Coke will not work because it is a very dilute solution of phosphoric
> acid, which gave rise to stories about it removing rust from bumpers.
>
> HA can be prepared from H3PO4 and CaOH2 .

EDTA might work. Dissolves egg shells readily.
--
DT




>



Posted by Leo Lichtman on August 5, 2008, 6:28 pm
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"Grant Erwin" wrote: (clip) I seem to recall hearing that Coca-Cola
actually dissolves teeth. Is that
> a workable solution to removing the old tooth from the gold crown? Is
> there a better one?
^^^^^^^^^^^^^^^^^^
It must be pretty slow--else most of the population would be toothless. I
suggest tap-tap-tap with a small hammer. Or leave the tooth in, and have a
jeweler add a small ring, so you can wear it on a chain around your neck.
:-)



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