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Positive Impressions is a crown and bridge dental laboratory. Our product line is diverse and designed to fill your prescription needs; from porcelain fused to metal and full cast crowns to all ceramic zirconia crowns and bridges, inlays/onlays, veneers, and implants including milled zirconia implants and custom cast milled abutments.


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From the Bench Phil Stoner

Tech Tips

From the Bench

How many carats is dental gold?

Comparing dental gold to jewelry gold is like comparing an apple to an orange. They are both fruit but the similarity stops there.

Dental and jewelry golds might have the same amount of gold but all of the other metals and percentages of those metals will be completely different.

Dental metals are alloyed to be able to take the punishment of chewing and hold up to the chemistry of the mouth. Jewelry metals are alloyed to be heated, hammered, stretched, reheated, hammered again, reheated and quinched to harden it. In addition, jewelry gold is alloyed to be soldered many times.

If you have a curious patient that asks you "What carat is dental gold?" then there is an easy formula you can use. The Identalloy label that is included with each returned restoration to you, outlines the percentages and composition of the dental alloy you have chosen to be used in fabricating the crown(s). If that alloy has gold (Au) in it, then placing a decimel point in front of the percentage amount and multiplying that number by 24, (the carat of pure gold) will give you the carat amount. For example, Argen's Argenco 75% High Noble gold has a percentage of 74.5% gold; convert to .745 and multiply by 24 = 17.88, rounded up it translates to 18 carat gold.

But remember, an 18 carat jeweler's gold would be too soft to use on dental restorations. An 18 carat dental gold has other alloys added for strength.

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