| 摘要 |
Dental ceramics with high thermal expansion as are used to produce metal/ceramic and full ceramic tooth replacements in the sinter process are normally processed (sintered, fired) at temperatures of 950@C +/- 30@C. It has been thought impossible to date to reduce this processing temperature considerably without at the same time losing thermal expansion and/or corrosion resistance or without using biologically unacceptable constituents such as, for example, lead oxide. With the dental ceramic according to the invention it is possible, while maintaining the usual values for thermal expansion, corrosion resistance and biological acceptability, to advance into a region of processing temperature of 725@C +/- 25@C. This opens up completely new uses for such dental ceramics and for their combinations with known normal-melting dental ceramics. |
