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    • 4. 发明授权
    • Ceramic dental restoration
    • 陶瓷牙修复
    • US06342302B1
    • 2002-01-29
    • US09438537
    • 1999-11-12
    • Jürgen SteidlSteffen Assmann
    • Jürgen SteidlSteffen Assmann
    • A61C1308
    • C03C4/0021A61K6/0017A61K6/0044A61K6/0215A61K6/0235A61K6/024A61K6/025A61K6/0255A61K6/026A61K6/0273C03C10/0018
    • A ceramic restoration based on a leucitic glass-ceramic, which is characterized in that the glass-ceramic includes by way of components 40-95 wt.-% SiO2 5-25 wt.-% Al2O3 5-25 wt.-% K2O 0-25 wt.-% Na2O 0-20 wt.-% CaO 0-8 wt.-% B2O3 0-0.5 wt.-% P2O5 0-3 wt.-% F, in that it contains, as sole crystalline phase, leucite in a total proportion from 20 to 45 wt.-%, at least 80% of the theoretically producible quantity of leucite being present, and in that it exhibits a linear coefficient of thermal expansion &agr;(20-500° C.) from 12.5·10−6 to 15.5·10−6 K−1. This glass-ceramic is particularly suitable for processing as pressed ceramic and can be advantageously faced with dental ceramic that exhibits a linear coefficient of thermal expansion &agr;(20-500° C.) from 13.5·10−6 to 17.0·10−6 K−1.
    • 一种基于白云石玻璃陶瓷的陶瓷修复体,其特征在于玻璃陶瓷包括作为唯一结晶相的组分,其总含量为20至45重量%的白云母,至少 存在理论上可生产的水镁石的80%,并且其表现出从12.5.10-6至15.5.10-6K-1的线性热膨胀系数α(20-500℃)。 这种玻璃陶瓷特别适用于作为压制陶瓷的加工,并且可以有利地面对表现出从13.5.10-6至17.0.10-6K的线性热膨胀系数α(20-500℃)的牙科陶瓷 -1。