Effect of Admixed Indium on Mercury Vapor Release from Dental Amalgam

  title={Effect of Admixed Indium on Mercury Vapor Release from Dental Amalgam},
  author={L Virginia Powell and Glen H. Johnson and D J Bales},
  journal={Journal of Dental Research},
  pages={1231 - 1233}
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… 

Figures from this paper

Reduced Mercury Vapor Release from Dental Amalgams Prepared with Binary Hg-In Liquid Alloys
The results showed that the release of mercury vapor decreased with increasing indium concentrations, and that the amalgams made with the Hg-In liquid alloy with 10% In or more released significantly less mercury than the modified 14% Indisperse.
Mercury Vaporization from Amalgams with Varied Alloy Compositions
It is concluded that the tin content in the γ1 matrix is the primary determinant of Hg vaporization from amalgam.
Effects of palladium addition on emission of mercury vapor from dental amalgam.
Release of mercury vapor from corroding amalgam in vitro.
  • R. I. Holland
  • Materials Science
    Dental materials : official publication of the Academy of Dental Materials
  • 1993
Influence of liquid films on mercury vapor loss from dental amalgam.
Effect of admixed indium on properties of a dispersed-phase high-copper dental amalgam.
  • G. H. Johnson, L. V. Powell
  • Materials Science, Medicine
    Dental materials : official publication of the Academy of Dental Materials
  • 1992
The Release of Mercury from Dental Amalgam: The Mechanism and in vitro Testing
  • M. Marek
  • Chemistry
    Journal of dental research
  • 1990
The dissolution/evaporation model best described the mercury release from dental amalgam restorations, as it showed that the results of mercury dissolution tests depend on many test variables, such as time, solution volume, oxidation and evaporation conditions, etc.
The effect of tin in the Ag-Hg phase of dental amalgam on dissolution of mercury.
  • M. Marek
  • Materials Science
    Dental materials : official publication of the Academy of Dental Materials
  • 1997
Initial mercury evaporation from amalgams made with in-containing commercial alloys.
Adding In to mercury or alloying In into the alloy particles appeared to be more effective in reducing the mercury vapor than admixing pure In particles into the amalgam.
Mercury evaporation from amalgams with varied mercury contents.
The mercury content more clearly influenced the mercury evaporation from the admixed type amalgam specimens when the mercury content decreased below the manufacturers' recommended trituration conditions.


The use of mercury in dentistry: a critical review of the recent literature.
This definitive review explores two critical issues related to the use of mercury in dentistry that have been the subject of intermittent controversy since the 1800s and concludes that no evidence exists linking mercury vapor from amalgam restorations to mercury poisoning.
Exposure to mercury and silver during removal of amalgam restorations.
The content of particulate matter and mercury vapor in dentist breathing air during removal of amalgam restorations was assessed and the mercury content was reduced to a level considerably lower than the threshold limit value.
Dental amalgam alloys.
  • K. Leinfelder
  • Medicine, Materials Science
    Current opinion in dentistry
  • 1991
This review discusses the advantages and disadvantages of amalgam alloys and predicts that one day, amalgam probably will be replaced by more esthetic materials that truly bond to all hard tooth surfaces.
Sulfur Uptake by Type I Collagen from Methyl Mercaptan/Dimethyl Disulfide Air Mixtures
Gas chromatographic analyses of head-space following one and four days of incubation indicated that all of the CH 3 SH was absorbed from the head- space by the collagen-containing liquid phase, while the (CH 3 S) 2 concentration of theHead-space remained essentially unchanged.