Mercury Evaporation from Amalgams with Varied Mercury Contents

Kazuhiro Ohmoto, Hiroshi Nakajima, Jack L. Ferracane, Hideaki Shintani, Toru Okabe

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

This study examined the relationship between mercury content and mercury evaporation from amalgams during setting. Two different types of commercial high-copper amalgams (single composition and admixed types) were used. Cylindrical specimens of each amalgam were prepared with five different mercury contents according to ADA Specification No.1. Specimens were also prepared by hand condensation. Mercury evaporation from amalgam specimens maintained at 37°C was measured using a gold film mercury analyzer from 10 min after the end of trituration until the mercury concentration in air reached an undetectable level. 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. Triturating with less mercury than the manufacturers' recommended amount cannot lower the evaporation of mercury from freshly made amalgam. Proper condensing procedures can minimize the mercury evaporation from the amalgam surface.

Original languageEnglish (US)
Pages (from-to)211-220
Number of pages10
JournalDental materials journal
Volume19
Issue number3
DOIs
StatePublished - Sep 2000

Keywords

  • Amalgam
  • Evaporation
  • Mercury

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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