This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Wirjosumarto, H. Articles by Mateer, R. S. Search for Related Content PubMed Articles by Wirjosumarto, H. Articles by Mateer, R. S. Social Bookmarking                         What's this?

Microstructural Differences in Silver-Tin Dental Amalgams Prepared from Chip and Spherical Alloy Particles

College of Engineering, University of Kentucky, Lexington, Kentucky 40506, USA

Richard S. Mateer

College of Engineering, University of Kentucky, Lexington, Kentucky 40506, USA

X-ray diffraction data support the stoichiometric requirement of the silver-tin amalgamation reaction that "unreacted y" diminish with increasing mercury. But particles corresponding to the original shape are visible in commercial spherical alloy amalgams. This is a "ghost" microstructure that results from internal amalgamation along dendrite branches of particles that have not been homogenized.

REFERENCES

• Black, G.V.: An Investigation of the Physical Characters of the Human Teeth in Relation to their Diseases, and to Practical Dental Operations, Together with the Physical Characters of Filling-Materials, Dent Cosmos 37:560, 1895.
• Paffenbarger, G.C., and Sweeney, W.T.: Specification and Certifications for Dental Materials (1934 Revision of Amalgam Alloy Specifications), JADA 21:658, 1934.
• Smith, D.L.; Ferguson, G.W.; and Schoonover, I.C.: Microstructure of Dental Amalgam, JADA 47:305-311, 1953.[Medline] [Order article via Infotrieve]
• Wing, G., and Ryge, G.: Reaction of Silver-Tin Alloys and Mercury, J Dent Res 44:701-711, 1965.[Free Full Text]
• Wing, G., and Ryge, G.: Setting Reactions of Spherical-Particle Amalgams, J Dent Res 44:1325-1333, 1965.[Free Full Text]
• Wing, G.: The Microstructure of Dental Amalgam, Aust Dent J 10:113-120, 1965.[Medline] [Order article via Infotrieve]
• Mateer, R.S., and Reitz, C.D.: Phase Identification and Quantitative Metallographic Procedures for Dental Amalgams, J Dent Res 50:551-558, 1971.[Abstract/Free Full Text]
• Troiano, A.R.: An X-ray Study of Dental Amalgams, J Inst Metals 63:247-263, 1938.
• Ryge, G.; Moffett, A.B.; and Barkow, A.G.: Microstructural Observations and X-ray Diffraction Studies of Silver-Tin Amalgams, J Dent Res 32:152-167, 1953.[Free Full Text]
• Fairhurst, C.W.: Crystallography of Dental Amalgam, PhD thesis North-western University, 1966 (University Microfilms, Inc., Ann Arbor, Mich, No. 67-4218).
• Allan, F.C.; Asgar, K.; and Peyton, F.A.: Microstructure of Dental Amalgam, J Dent Res 44:1002-1012, 1965.[Free Full Text]
• Johnson, L.N.; Asgar, K.; and Peyton, F.A.: Microanalysis of Copper-Tin Phases in Dental Amalgam, J Dent Res 48:872-878, 1969.[Abstract/Free Full Text]
• Nadal, R.; Phillips, R.W.; and Swartz, M.L.: Clinical Investigation on the Relation of Mercury to the Amalgam Restoration, I, JADA 63:8-21, 1961.
• Asgar, K., and Sutfin, L.: Brittle Fracture of Dental Amalgam, J Dent Res 44: 977-988, 1965.[Free Full Text]
• Mahler, D.B., and Van Eysden, J.: Dynamic Creep of Dental Amalgam, J Dent Res 48:501-508, 1969.[Abstract/Free Full Text]
• Wagner, E.: Beitrag zur Klaarung des Korossionsverhaltens der Silber-Zinn-Amalgame, Dtsch Zahnaerztl Z 17:99-106, 1962.
• Guthrow, C.E.; Johnson, L.B.; and Lawless, K.R.: Corrosion of Dental Amalgam and Its Component Phases, J Dent Res 46:1372-1381, 1967.[Free Full Text]
• Mateer, R.S., and Reitz, C.D.: Corrosion of Amalgam Restorations, J Dent Res 49: 399-406, 1970.[Free Full Text]
• Jorgensen, K.D., and Saito, T.: Structure and Corrosion of Dental Amalgams, Acta Odontol Scand 28:129-142, 1970.[CrossRef][Medline] [Order article via Infotrieve]
• Eden, G.T., and Waterstrat, R.M.: Effects of Packing Pressures on the Properties of Spherical Alloy Amalgams, JADA 77:1024-1030, 1967.
• Demaree, N.C., and Taylor, D.F.: Properties of Dental Amalgams Made from Spherical Alloy Particles, J Dent Res 41: 890-906, 1962.[Free Full Text]
• Waterstrat, R.M., and Hicho, G.E.: Detection of Lattice Deformation and Recovery in Epsilon Phase Silver-Tin Alloys, J Res Natl Bur Stds 68A:317-323, 1964.
• Crowell, W.S.: The Metallography of Dental Amalgam Alloys, J Dent Res 33: 592-595, 1954.

Journal of Dental Research, Vol. 52, No. 1, 13-18 (1973)
DOI: 10.1177/00220345730520010501


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				J. W. Edie, D. B. Boyer, and Kai Chiu Chan Estimation of the Phase Distribution in Dental Amalgam with the Electron Microprobe Journal of Dental Research, February 1, 1978; 57(2): 277 - 282. [Abstract] [PDF]

				D. B. Mahler, J. D. Adey, and R. L. Marantz Creep Versus Microstructure of {gamma}2-Containing Amalgams Journal of Dental Research, December 1, 1977; 56(12): 1493 - 1499. [Abstract] [PDF]

This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Wirjosumarto, H. Articles by Mateer, R. S. Search for Related Content PubMed Articles by Wirjosumarto, H. Articles by Mateer, R. S. Social Bookmarking                         What's this?