Re: dental gold?

Abrasha wrote:

Joseph Gwinn wrote:

In article <48999bd4.2393088829@xxxxxxxxxxxxxxxx>, etpm@xxxxxxxxxxx wrote:

On Wed, 06 Aug 2008 05:44:26 GMT, Grant Erwin
<grant@xxxxxxxxxxxxxxxxxx> wrote:

Tom Gardner wrote:

"Grant Erwin" <grant@xxxxxxxxxxxxxxxxxx> wrote in message news:1e4mk.309$xv.240@xxxxxxxxxxx

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


Hammer.

That's kind of what I am thinking. I'll try that tomorrow, let you know
what happened.

Grant

A propane torch will just burn out the tooth from the gold.


Beware mercury fumes. The gold in crowns may be or contain mercury-gold amalgam, not just gold-copper casting alloy.

Joe Gwinn



Gold crowns are not made from amalgams. Gold amalgams are used for fillings. Silver amalgam fillings are always removed before a tooth is crowned.

The reason that an amalgam filled tooth gets a crown in the first place, is mostly, that there is new decay around or even under the filling, so the tooth has to be cleaned and the amalgam is removed to make place for either an inlay, overlay or a full crown. You cannot prep a tooth properly for a crown, with the amalgam still in place.

It not necessary to put a torch to a tooth with a crown still on it. Since the tooth has already been extracted, it will have become brittle rather rapidly, because it is no longer fed by blood vessels and nerves. Just take a pair of pliers to it, and it'll break in pieces quite easily.

BTW, before I became a goldsmith, I spent three years in dental school at the university of Amsterdam trying to become a dentist.


I put the crown, tooth in it, in a bench vise, minor closure, CRACK, all
the tooth pieces fell out. Took about 3 seconds flat.

Now I have 2.7 grams of gold crown and another couple grams of whatever alloy
they use under ceramic. Oh, the bench vise cracked off about 95% of the ceramic
too, on that one.

Grant
.

Relevant Pages

  • Re: dental gold?
    ... The next step typically is to rebuild the tooth. ... the crown and an impression is taken. ... When you heat the gold crown on a tooth you have no idea if there is mercury ... volatilize the mercury or create a gold amalgam. ...
    (rec.crafts.metalworking)
  • Re: dental gold?
    ... back the gold crown, tooth still in it of course. ... Silver amalgam fillings are always removed before a tooth is ...
    (rec.crafts.metalworking)
  • Re: Gold crowns require less tooth removal?
    ... >> but then said the main reason was because less tooth structure is removed ... >> for a gold crown than porcelain fused to gold. ... front of the one getting the crown has a large silver filling. ...
    (sci.med.dentistry)
  • Re: dental gold?
    ... back the gold crown, tooth still in it of course. ... Silver amalgam fillings are always removed before a tooth is crowned. ...
    (rec.crafts.metalworking)
  • Re: Dental Gold
    ... teeth were filled with amalgam before crowning, ... The reason that an amalgam filled tooth gets a crown in the first place, is mostly, that there is new decay around or even under the filling, so the tooth has to be cleaned and the amalgam is removed to make place for either an inlay, overlay or a full crown. ...
    (rec.crafts.metalworking)