赤外線輻射方式陶材焼付成法に関する研究 : 焼付強度ならびに陶材表面性状からの最適焼成温度の検討

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In this study, the author, applying infra-red radiation furnace "Technomat", investigated the influence of firing temperature to the property of porcelain. Three Ni-Cr alloys and their specified porcelain powder were examined, push shear bond test, surface roughness measurment (Rmax, Rz) and SEM analysis of porcelain surface were carried out.1. Shear bond strength was maximum under the condition 20℃ lower than recommended temperature by 2 Beryllium-free alloys, although by Beryllium containing alloy under the specified temperature (960℃) the bond strength was maximum. 2. Through surface roughness measurment, those fired under 20℃ lower than the specified temperature showed glazed texture by every porcelain, therefore this condition is considered clinically optimum. 3. Observating surface texture by SEM analysis, the higher firing temperature becomes, the more intensely the porcelain particle's fusing undergoing. 4. Shear bond strength of low Cr containing alloy showed generally weak despite decrease of firing temperature. Increase of firing temperature for high Cr containing alloy demonstrated an increase of bond strength value. By Beryllium-containing alloy revealed high coefficients of firing temperature versus bond strength value.
日本補綴歯科学会の論文
1988-06-01