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A study of a low copper dental amalgam by analytical transmission electron microscopy

Published online by Cambridge University Press:  31 January 2011

Tejpal Kaur Hooghan ,
Russell F. Pinizzotto ,
John H. Watkins  and
Toru Okabe
Tejpal Kaur Hooghan
Affiliation:
Materials Science Department, University of North Texas, Denton, Texas 76203–0308
Russell F. Pinizzotto
Affiliation:
Materials Science Department, University of North Texas, Denton, Texas 76203–0308
John H. Watkins
Affiliation:
Department of Biomaterials Science, Baylor College of Dentistry, Dallas, Texas 75246
Toru Okabe
Affiliation:
Department of Biomaterials Science, Baylor College of Dentistry, Dallas, Texas 75246
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Abstract

Analytical transmission electron microscopy was used to study specimens of a low-Cu dental amalgam (Velvalloy), prepared using the “wedge technique.” Analysis confirmed that the microstructure consists of a Ag2Hg3(γ1)/HgSn7−9(γ2) matrix surrounding unreacted Ag3Sn(γ) particles. In addition a hitherto uncharacterized reaction layer of fine grains between Ag3Sn(γ) and Ag2Hg3(γ1) is a mixture of Ag3Sn(γ), Ag–Hg–Sn (β1), Ag2Hg3 (γ1), and occasionally Cu6Sn5 (η′). An Ag–Hg–Sn (β1) phase was clearly identified for the first time. Since Velvalloy is a simple commercial dental amalgam, it is a reasonable starting point for characterizing more complex dental amalgam microstructures.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 10 , October 1996 , pp. 2474 - 2485
Copyright
Copyright © Materials Research Society 1996

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References

REFERENCES

1. Okabe, T., in Encyclopedia of Materials Science and Engineering, edited by Cahn, R. W. (Pergamon Press, Oxford), Suppl. Vol. 2, 866 (1990).Google Scholar
2. Jensen, S. J., Olsen, K. B., and Utoft, L., Scand. J. Dent. Res. 81, 572 (1979).Google Scholar
3. Okabe, T., Hochman, R. F., and Sims, L. O., J. Biomed. Mater. Res. 9, 221 (1975).Google Scholar
4. Hansen, M. and Anderko, K., Constitution of Binary Alloys (McGraw-Hill, New York, 1958).Google Scholar
5. Bryant, R. W., Aust. Dent. J. 29, 163 (1984).CrossRefGoogle Scholar
6. Mitchell, R. J. and Okabe, T., Critical Rev. in Oral Biology and Medicine 7, 12 (1996).Google Scholar
7. Okabe, T. and Mitchell, R. J., Critical Rev. in Oral Biology and Medicine 7, 23 (1996).Google Scholar
8. Aldinger, F. and Kraft, W., Metallkde, Z.. 68, 523 (1977).Google Scholar
9. Okabe, T., Ling, F., and Hochman, R. F., J. Dent. Res. 54, L162 (1975).Google Scholar
10. Jonson, L. B. Jr.., J. Biomed. Mater. Res. 1, 285 (1967).CrossRefGoogle Scholar
11. Jonson, L. B. Jr.., J. Biomed. Mater. Res. 1, 415 (1967).Google Scholar
12. Abbott, J. R., Miller, D. R., and Netherway, D. J., J. Biomed. Mater. Res. 20, 1391 (1986).Google Scholar
13. Phillips, R. W., Skinner's Science of Dental Materials (Saunders Co., Philadelphia, PA, 1982).Google Scholar
14. Watkins, J. H., Nakajima, H., Hanaoka, K., Zhao, L., Iwamoto, T., and Okabe, T., Dent. Mater. 11, 24 (1995).Google Scholar
15. Johnson, L. B. and Paffenbarger, G. C., J. Dent. Res. 59, 1412 (1980).Google Scholar
16. Boswell, P. G., Scripta Metall. 13, 383 (1979).Google Scholar
17. Boswell, P. G., J. Mater. Sci. 15, 1311 (1980).Google Scholar
18. Waterstrat, R. M. and Okabe, T., Intermetallic Compounds (John Wiley & Sons Ltd., 1994), Vol. 2, p. 575.Google Scholar
19. White, S. S. Dental Products International, Holmdel, NJ 07733.Google Scholar
20. DeFreitas, J. F., Aust. Dent. J. 24, 17 (1979).Google Scholar
21. Addendum to American National Standards Institute/American Dental Association Specification No. 1 for Alloy Dental Amalgam, JADA 95, 614 (1977).Google Scholar
22. Reynolds, C. L. Jr.., and Wawner, F. E. Jr.., Biomat., Med. Dev., Art. Org. 2, 67 (1974).Google Scholar
23. Klepeis, S. J., Anderson, R. M., and Benedict, J. P., in Specimen Preparation for Transmission Electron Microscopy of Materials, edited by Bravman, J.C., Anderson, R.M., and McDonald, M.L. (Mater. Res. Soc. Symp. Proc. 115, Pittsburgh, PA, 1988), p. 179.Google Scholar
24. Benedict, J. P., Anderson, R. M., and Klepeis, S. J., in Specimen Preparation for Transmission Electron Microscopy of Materials III, edited by Anderson, R., Tracy, B., and Bravman, J. (Mater. Res. Soc. Symp. Proc. 254, Pittsburgh, PA, 1992), p. 121.Google Scholar
25. South Bay Technology, Inc., 1120 Via Callejon, San Clemente, CA 92672).Google Scholar
26. Quick bonding nail glue, Sally Hansen Div., Del Laboratories, Inc., Farmingdale, NY 11735.Google Scholar
27. Allied High Tech Products, Inc., 2376 East Pacifica Place, Rancho Dominguez, CA 90220.Google Scholar
28. International Centre for Diffraction Data, 12 Campus Blvd., Newtown Square, PA 19073, Powder Diffraction File PDF#11–67, 27–618, 29–1151, 1–1240, 2–713.Google Scholar
29. Petzow, G. and Effenberg, G., Ternary Alloys–A Comprehensive Compendium of Evaluated Constitutional Data on Phase Diagrams (VCH Vergsgesellschaft, Weinheim, Germany, 1988), pp. 256–261, 38–40.Google Scholar
30. Edington, J. W., Practical Electron Microscopy in Materials Science (Van Nostrand Reinhold Co., New York, 1976), Appendix 4, pp. 303–312.Google Scholar
31. Noran Instruments, 2551 W. Beltline Highway, Middleton, WI 53562–2679.Google Scholar
32. Okabe, T., Mitchell, R. J., Butts, M. B., and Fairhurst, C. W., J. Dent. Res. 57, 975 (1978).Google Scholar
33. Fairhurst, C. W., Ph. D. Thesis, Northwestern University, Evanston, IL (1966).Google Scholar
34. Hanawa, T., Takahasi, H., Ota, M., Pinizzotto, R. F., Ferracane, J.L., and Okabe, T., J. Dent. Res. 66, 1470 (1987).Google Scholar
35. Mahler, D. B., Adey, J. D., and Eysden, J.V., J. Dent. Res. 54, 218 (1975).Google Scholar
36. Jensen, S. J. and Anderson, P., Scan. J. Dent. Res. 80, 158 (1972).Google Scholar
37. Mahler, D. B. and Adey, J. D., J. Dent. Res. 63, 921 (1984).Google Scholar