Microstructures of high copper commercial amalgams containing varying amounts of mercury, ranging from 20% above to 25% below recommended values, were primarily investigated by x-ray diffraction. Mechanisms relating to the absence or presence of γ2 (Sn-Hg) phase in these amalgams were discussed in relation to the presence of copper and tin elements in their original alloys. The optimum mercury concentration in some amalgams was determined in order to keep them free of the γ2 (Sn-Hg) phase.
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References
1.
Council on Dental Materials and Devices, American Dental Association: List of Certified Dental Materials and Devices Revised to Jan. 1, 1977,JADA94:135, 1977.
2.
Council on Dental Materials and Devices, American Dental Association: Supplement of the List of Certified Dental Materials and Devices, JADA95:131, 1977.
3.
Council on Dental Materials and Devices, American Dental Association: Certified Alloys for Dental Amalgam, JADA96: 126, 1978.
4.
Malhotra, M.L. and Asgar, K.: Physical Properties of Dental Silver-Tin Amalgams with High and Low Copper Contents, JADA96:444, 1978.
5.
Malhotra, M.L. and Asgar, K.: Microstructure of Dental Amalgams Containing High and Low Copper Contents, J Dent Res56:1481-1487, 1977.
6.
Marek M. and Hochman, R.F.: Corrosion Properties of a Low Silver and High Copper Dental Amalgam , IADR Progr & Abst55: No. 282, 1976.
7.
Moffa, J.P. and Jenkins, W.A.: Two Year Clinical Evaluation of a Dispersed Phase and a Single Phase Amalgam , IADR Progr & Abst56: No. 114, 1977.
8.
Jensen, S.J. : Phase Content of a High Copper Dental Silver Amalgam, Scand J Dent Res85:297, 1977.
9.
Mahler, D.B. and Adey, J.D.: Characteristics of a High Copper Amalgam , IADR Progr & Abst56: No. 145, 1977.
10.
Mahler, D.B. : Behavior of Three High-Cu Amalgams, J Biomed Mater Res13:693, 1979.
