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At least 865 records · Page 48Linked to original sources
PubMed1988

Corrosion of dental amalgam and mercury vapor emission in vitro.

Amalgam specimens were immersed for 30 days in 1) water, 2) 0.9% NaCl in water, 3) 0.9% NaCl and 10 mM phosphate buffer in water, and 4) 0.9% NaCl, 7.7 mM phosphate, and 6.1 mM citric acid in water. The solutions were stored in stoppered glass tubes. Hg-drops were immersed in solutions 1, 2, and 3. The concentration of mercury vapor in the air above the solutions was measured once a day. After 30 days the amounts of Cu, Zn, Hg, and Ag in the solutions were analyzed by atomic absorption spectrophotometry. The results showed that 0.9% NaCl alone or in combination with the additives increased the amounts of elements released into the solutions. The concentration of Hg0 in the glass tubes increased with the amount of Hg in the solutions, with the exception of solution No. 3, from which significantly less Hg0 evaporated. The results indicate that the composition of the saliva, oral hygiene and dietary factors may be determinants of Hg0 emission from amalgams in the oral cavity.

Copper↗
PubMed1980

[Studies on Pd base ternary alloys for dental amalgam. (Part 2) On the corrosion resistivity (author's transl)].

In the previous paper, the author reported the effect of composition of Pd base ternary alloys on the dimensional change, the compressive strength, hardness and microanalysis by EPMA. In this paper, corrosion resistivity of Pd base ternary alloy amalgam was studied by comparison of reflective light intensity, surface roughness and weight change before and after corosion test in 0.1% Na2S, 0.1% lactive acid and 1% NaCl solution. The main results obtained are as follows: (1) Pd base ternary alloy amalgam showed much higher corrosion resistivity than that of on the market silver-tin-copper amalgam. (2) On the (60 Pd-40 Ag)-Sn alloy amalgam, corrosion resistivity was gradually improved by addition of Sn up to 10 wt% Sn, and the best corrosion resistivity was observed in (60 Pd-40 Ag)-10 Sn among Pd base alloy amalgam tested in this study. (3) On the (60 Pd-40 Ag)-Cu alloy amalgam, corrosion resistivity decreased gradually with increment of Cu content. (4) Weight of (60 Pd-40 Ag)-Sn alloy amalgam was a little increased after corrosion test in 0.1% Na2S solution, but that of (60 Pd-40 Ag)-Cu alloy amalgam showed a tendancy to decrease. (5) Corrosion of Pd base alloy amalgam was observed mainly in the matrix. Tarnish on the core was observed a little. Since fine cut amalgam has the smaller rate of area of core than that of spherical amalgam, surface roughness was comparatively large.

Copper↗
PubMed1997

[Mercury in dental amalgams--a stress on the body or poisoning?].

The human organism is exposed to mercury from the environment and working environment. In the diet the main source of mercury are marine fish. Amalgam fillings participate in the mercury load of the organism as was proved by investigations of the mercury content of the brain, kidneys and lenses. However, it was not confirmed that the mercury load from amalgam fillings caused intoxication.

Dental Amalgam↗