A silver-tin alternative to dental amalgams

M. P. Dariel, W. Admon, D. S. Lashmore, M. Ratzker, A. Giuseppetti, F. C. Eichmiller

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

This paper describes a novel technology for a mercury-free metallic direct filling material, a substitute to dental amalgams. The consolidation relies both on cold-welding that takes place under moderate pressure between suitably surface-treated silver particles and on silver-tin intermetallic compound formation at ambient temperature. A dilute acid is used for removing the silver surface oxide layers, thereby promoting the cold-welding process. The condensability, namely the ability of a loose powder to undergo consolidation within a short time duration, at body temperature and under moderate pressure has been investigated for a variety of mixtures of silver, tin, and prealloyed silver-coated intermetallic powders. The resulting metallic composite material displays transverse rupture strength values higher than those of amalgams and somewhat lower values of compressive strength and Knoop hardness.

Original languageEnglish
Pages (from-to)505-511
Number of pages7
JournalJournal of Materials Research
Volume10
Issue number3
DOIs
StatePublished - 1 Jan 1995

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