著者

寺岡 文雄 北原 一慶 木村 博

出版者

一般社団法人日本歯科理工学会

雑誌

歯科材料・器械. Special issue, 日本歯科理工学会学術講演会講演集 (ISSN:02865858)

巻号頁・発行日

vol.12, no.21, pp.244-245, 1993-03-15

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レーザ変位計を用いた非接触法により、臨床に近い状態での模型材の凝結膨張を測定し、凝結膨張率と模型材の寸法精度との関係について検討した。ニューフジロック、インディックダイストーン、ニュープラストーン、モデルマティリアルの凝結膨張率は、それぞれ0.09%、0.10%、0.29%、0.76%であり、各メーカーの値よりも大きくなったが、こらは非接触法による測定法を用いたためだと思われる。

著者

寺岡 文雄 北原 一慶 多田 広宣 中川 正史 高橋 純造

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.39, no.2, pp.274-279, 1995-04-01 (Released:2010-08-10)

参考文献数

12

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Dimensional changes of complete dentures, which were constructed by six conventional polymerization methods, were investigated after polymerization and during storage. The discrepancy at median line and alveolar ridge was larger in the dentures constructed in a water bath at 70°C for 40 min and then at 100°C for 30 min, in a hot press and by microwave polymerization than in a water bath at 70°C for 24 hrs, for 8 hrs and by autopolymerization. The discrepancy at the denture border of the dentures constructed by autopolymerization during storage in water for 30 days was 0.174±0.048 mm and in the case of the dentures constructed by other polymerization methods was less than 0.1 mm. Since the dimensional changes of the dentures during storage in water occurred up to 7 days, it seems reasonable that wearing dentures or occlusional adjustment should be carried out after storage in water for more than 7 days. The discrepancy was 3 to 4 times in the dentures stored in air than in water. When the dentures which were stored in air for 30 days was immersed in water for 30 days, the discrepancy at the denture border of the dentures constructed by autopolymerization was restored to 0.214±0.097 mm, but in the case of other polymerization methods, it was restored to about 0.14 mm.