| Literature DB >> 10898870 |
W Höland1, M Schweiger, M Frank, V Rheinberger.
Abstract
The aim of this report is to analyze the microstructures of glass-ceramics of the IPS Empress 2 and IPS Empress systems by scanning electron microscopy. The main properties of the glass-ceramics were determined and compared to each other. The flexural strength of the pressed glass-ceramic (core material) was improved by a factor of more than three for IPS Empress 2 (lithium disilicate glass-ceramic) in comparison with IPS Empress (leucite glass-ceramic). For the fracture toughness, the K(IC) value was measured as 3.3 +/- 0.3 MPa. m(0.5) for IPS Empress 2 and 1.3 +/- 0.1 MPa. m(0.5) for IPS Empress. Abrasion behavior, chemical durability, and optical properties such as translucency of all glass-ceramics fulfill the dental standards. The authors concluded that IPS Empress 2 can be used to fabricate 3-unit bridges up to the second premolar. Copyright 2000 John Wiley & Sons, Inc.Entities:
Mesh：
Substances：
Year: 2000 PMID： 10898870 DOI： 10.1002/1097-4636(2000)53:4<297::aid-jbm3>3.0.co;2-g
Source DB: PubMed Journal: J Biomed Mater Res ISSN： 0021-9304