Experimental observation of silver and gold penetration into dental ceramic by means of a radiotracer technique.

Abstract:

:A radiotracer technique was used to study silver and gold diffusion into dental porcelain under experimental conditions close to the real conditions in prosthetic laboratories for porcelain bakes. It was clearly shown that these non-oxidizable elements were able to diffuse into the ceramic as well as oxidizable ones. The penetration depth varied widely according to the element. The ratio DAg/DAu was about 10(3) around 850 degrees C. In contrast to gold, the silver diffusion rate was high enough to allow silver, from the metallic alloy, to be present at the external ceramic surface after diffusion into the ceramic. Hence, the greening of dental porcelains baked on silver-rich alloys could be explained mainly by a solid-state diffusion mechanism.

journal_name

J Dent Res

authors

Moya F,Payan J,Bernardini J,Moya EG

doi

10.1177/00220345870660120401

subject

Has Abstract

pub_date

1987-12-01 00:00:00

pages

1717-20

issue

12

eissn

0022-0345

issn

1544-0591

journal_volume

66

pub_type

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