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KMID : 0362219670020010003
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Journal of The Korean Research Society for Dental Materials
1967 Volume.2 No. 1 p.3 ~ p.8
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Studies on Dental Amalgam Alloys made by Army Research and Testing Laboratory of Republic of Korea
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金哲偉/Kim, Cheol-We
鮮于良國/辛哲吉/金正雄/趙天植/Sunoo, Young-Gook/Syn, Chol-Kyl/Kim, Chung-Woong/Cho, Cheun-Sik
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Abstract
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The purpose of this study was to determine the dimensional change, flow, and crushing strength at various time intervals with amalgam alloys made by the mech. and met. division, the army res-1 earch and testing laboratory, Seoul, Korea.
The chemical composition of the alloy used in these tests are Ag: 68.03% Sn: 26.53%, Cu: 4.76 %, Zn: 0.68% and the size of the particles are 200^270 mesh, 270325 mesh and 325 mesh.
All, specimens measured Ag: Hg, 5:8 by weight and triturated for 46 seconds in a mechanical amalgamator, and packed by Amslers Spring Tester with condensation pressure 300 kg/cmz; and 700 kg/cm2
From the experiments, we obtained the following results.
1. It was observed that the dimensional change reached at 13 microns per centimeter during the
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