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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

Publication:
May/June 1995
Volume 8 , Issue 3

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Eement Release and Cytotoxicity of Pd-Cu Binary Alloys

Wataha/Craig/Hanks

Pages: 228-232
PMID: 10348590

The release of elements from a series of palladium-copper alloys into cell-culture medium was measured using atomic absorption spectroscopy. The effect of the alloys on the succinyl dehydrogenase activity of Balb/c 3T3 fibroblasts was also measured. Palladium inhibited the release of Cu in alloys up to 70 atomic weight percent Cu. Below 70 at. % Cu, Cu release was 0.8 ug/cm2 at 72 hours. Palladium release was lower from purebPd (0.08 ug/cm2 at 72 hours from the Pd-Cu alloys containing >70 at.% Cu, where it increased to 1.2 ug/cm2. The cytotoxicity of the alloys correlated closely with the realease of Cu, becoming markedly cytotoxic above 70 at.% Cu, when Cu release was greater than 2.2 ug/cm2.

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