| abstract |
A pre-sintered blank based on lithium metasilicate glass ceramic is particularly suitable for the preparation of dental restorations. A pre-sintered blank based on lithium metasilicate glass ceramic which is particularly suitable for the preparation of dental restorations is described. Surprisingly, not only can the blanks according to the invention be dry-machined in a simple way, but also be prepared at significantly different pre-sintering temperatures, which leads to a substantial change in the shrinkage that occurs during subsequent dense sintering. It has been found that no. Thus, the expansion factor taking into account the resulting contraction can be determined very accurately. These advantageous properties are clearly due to the specific behavior of the lithium metasilicate glass ceramic during presintering to the relative density indicated above, and also high strength at high temperatures as commonly applied, for example, during dense sintering. It is attributable to its ability to be converted to lithium disilicate glass ceramic. 【Selection chart】 None |