The Journal of the Japanese Society for Dental Materials and Devices
Online ISSN : 2188-4188
Print ISSN : 0286-5858
ISSN-L : 0286-5858
Original Article
Improvement of Mechanical Properties of Gypsum Model Materials : (Part 3) Effect of Addition of Calcium Hydrogen Phosphate and Calcium Hydrogen Phosphate Dihydrate on the Bending Strength and Surface Roughness of Dental Stone
Kozo UMEMOTO, Shin-ichi HIGUCHI, Katsuhiro INOMATA, Akira YAMANAKA, Shigeaki KURATA, Noboru YAMAZAKI
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Keywords: Calcium sulfate dihydrate, Calcium hydrogen phosphate, Calcium hydrogen phosphate dihydrate, Mechanical property, Bending strength, Surface roughness
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1987 Volume 6 Issue 4 Pages 496-499

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Abstract
The addition of calcium hydrogen phosphate (CHP) and calcium hydrogen phosphate dihydrate (CHPD) crystals to a dental stone (Fujirock) was found to improve mechanical properties of gypsum model materials. Crystal of calcium sulfate dihydrate of a hardened mixture propagated on the CHP and CHPD crystals, producing a precise network structure of the dental stone. The Bending strength and the surface roughness of the hardened mixture markedly improved.
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© 1987 The Japanese Society for Dental Materials and Devices
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