A SILVER-TIN ALTERNATIVE TO DENTAL AMALGAMS

Citation
Mp. Dariel et al., A SILVER-TIN ALTERNATIVE TO DENTAL AMALGAMS, Journal of materials research, 10(3), 1995, pp. 505-511
Citations number
12
Categorie Soggetti
Material Science
ISSN journal
08842914
Volume
10
Issue
3
Year of publication
1995
Pages
505 - 511
Database
ISI
SICI code
0884-2914(1995)10:3<505:ASATDA>2.0.ZU;2-U
Abstract
This paper describes a novel technology for a mercury-free metallic di rect filling material, a substitute to dental amalgams. The consolidat ion relies both on cold-welding that takes place under moderate pressu re between suitably surface-treated silver particles and on silver-tin intermetallic compound formation at ambient temperature. A dilute aci d is used for removing the silver surface oxide layers, thereby promot ing the cold-welding process. The condensability, namely the ability o f a loose powder to undergo consolidation within a short time duration , at body temperature and under moderate pressure has been investigate d for a variety of mixtures of silver, tin, and prealloyed silver-coat ed intermetallic powders. The resulting metallic composite material di splays transverse rupture strength values higher than those of amalgam s and somewhat lower values of compressive strength and Knoop hardness .