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Journal of Dental Research
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Effect of Admixed Indium on Mercury Vapor Release from Dental Amalgam

L.V. Powell

Department of Restorative Dentistry SM-56, School of Dentistry, University of Washington, Seattle, Washington 98195

G.H. Johnson

Department of Restorative Dentistry SM-56, School of Dentistry, University of Washington, Seattle, Washington 98195

D.J. Bales

Department of Restorative Dentistry SM-56, School of Dentistry, University of Washington, Seattle, Washington 98195

The purpose of this study was to evaluate the effect of admixed indium on the amount of mercury vapor released from dental amalgam. We made amalgam specimens according to ADA Specification Number 1. We added various amounts (0-14% by weight) of indium to the alloy powder. We also tested the commercial amalgams Dispersalloy, Valiant, and Indiloy. Specimens were held at 37°C and 100% humidity. We used a Jerome Mercury Vapor Analyzer (model 411) to measure the mercury vapor released. We analyzed the data by means of AN-OVA and Student-Newman-Keuls procedures. Admixed indium significantly decreased the amount of mercury vapor released from dental amalgams; the period of the greatest effect on mercury vapor released was during the setting phase of amalgam; and dental amalgams with greater than or equal to 8% admixed indium released the least amount of mercury vapor.

Journal of Dental Research, Vol. 68, No. 8, 1231-1233 (1989)
DOI: 10.1177/00220345890680080301
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This article has been cited by other articles:


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H. Nakajima, Y. Akaiwa, H. Hashimoto, J.L. Ferracane, and T. Okabe
Surface Characterization of Amalgam Made with Hg-In Liquid Alloy
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J.L. Ferracane, J.D. Adey, H. Nakajima, and T. Okabe
Mercury Vaporization from Amalgams with Varied Alloy Compositions
Journal of Dental Research, July 1, 1995; 74(7): 1414 - 1417.
[Abstract] [PDF]

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T. Okabe, T. Yamashita, H. Nakajima, A. Berglund, L. Zhao, I. Guo, and J.L. Ferracane
Reduced Mercury Vapor Release from Dental Amalgams Prepared with Binary Hg-In Liquid Alloys
Journal of Dental Research, November 1, 1994; 73(11): 1711 - 1716.
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