Amalgam made with Brewster Alloy (62% Ag, 33% Sn, 5% Cu, and 0.2% Zn) had little or no dimensional change during 24 h at 23°C.
Brewster amalgam stored for five yr in air expanded 186, 68, and 14 μm/cm at 60, 37, and 23°C, respectively.
Nearly "stable" conditions were approached at about 50 mo.
Get full access to this article
View all access options for this article.
References
1.
Paffenbarger, G.C.; Rupp, N.W.; and Patel, P.R.: Dimensional Change of Dental Amalgam and a Suggested Correlation Between Marginal Integrity and Creep, JADA99:31-36,1979.
2.
Paffenbarger, G.C.; Rupp, N.W.; and Patel, P.R.: Linear Dimensional Change of Copper-rich Dental Amalgam, JADA99:468-471, 1979.
3.
Paffenbarger, G.C.; Rupp, N.W.; and Waterstrat , R.M.: Linear Change in Zinc and Non-zinc Paired Amalgams at 60°C, IADR Progr & Abst59:No. 333, 1980.
4.
Rupp, N.W.; Paffenbarger, G.C.; and Coyne, M.P.: Dimensional Changes in Air on Amalgams after 4½ Years, IADR Progr & Abst60:No. 689, 1981.
5.
Paffenbarger, G.C.; Rupp, N.W.; and Patel, P.R.: Copper-free Amalgams: Dimensional Change after 4½ Years, IADR Progr & Abst60:No. 841, 1981.
6.
Guide to Dental Materials and Devices, 6th ed, Chicago, IL: American Dental Association, 1972-1973, p. 22.
7.
Guide to Dental Materials and Devices, 2nd ed., Chicago, IL: American Dental Association, 1964, p. 85.
8.
Black, G.V.: The Physical Properties of Silver-Tin Amalgams, Dent Cosmos37:965-992, 1896.
9.
Gayler, M.L.V. : The Setting of Dental Amalgam. Part III, Br Dent J58:145-160, 1935.
10.
American Dental Association Specifications for Dental Materials , 4th ed., Chicago, IL: American Dental Association, 1969, p. 17.
11.
Guide to Dental Materials and Devices, 7th ed., Chicago, IL: American Dental Association, 1974-1975, p. 170.
12.
Caul, H.J.; Crowell, W.S.; Kimmel, W.D.; and Paffenbarger, G.C. : Early Strength, Flow and Dimensional Changes
13.
Obtained on Amalgam Prepared with Standardized Technic, JADA69:742-748, 1964.
14.
Taylor, N.O. : A Survey of Amalgam Alloys: A Report to the Research Commission of the American Dental Association, JADA16:3-11, 1929.
15.
Reynolds, C.L. : The Redistribution of Mercury as Observed in Phase Transformations in Amalgam, J Biomed Mater Res7:335-352, 1973.
16.
Johnson, L.B. : Confirmation of the Presence of β (Ag-Hg) in Dental Amalgam, J Biomed Mater Res1:415-425, 1967.
17.
Johnson, L.B. : The Amount of Tin in the γ1 Phase of Dental Amalgam, J Biomed Mater Res5:239-244, 1971.
18.
Jrgensen, K.D. : The Mechanism of Marginal Fracture of Amalgam Fillings, Acta Odontol Scand23:347, 1965.
