caa a22 4500 475782283 CHVBK 20180406123647.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1023/A:1008977416834 doi (NATIONALLICENCE)springer-10.1023/A:1008977416834 Needle-like apatite-leucite glass-ceramic as a base material for the veneering of metal restorations in dentistry [Elektronische Daten] [W. Ho¨land, V. Rheinberger, S. Wegner, M. Frank] A needle-like apatite-leucite glass-ceramic was prepared in the SiO2-Al2O3-Na2O-K2O-P2O5-F system. Nucleation and crystallization processes were studied in bulk and powdered samples. The crystallization of leucite follows the mechanism of surface crystallization. After the precipitation of NaCaPO4 crystals and another unknown crystal phase, the formation of needle-like apatite is based on a volume nucleation and crystallization process. The mechanism of the formation of needle-like apatite differs to those of apatite precipitation in glass-ceramics. The morphology of needle-like apatite is comparable to that of apatite in natural teeth. The properties of the glass-ceramic, especially the good chemical durability, the optical properties, as well as mechanical and thermal properties allow glass-ceramic to be used as a main component in a bio-material for the veneering of metal restorations in dentistry. Kluwer Academic Publishers, 2000 Ho¨land W. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut Rheinberger V. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut Wegner S. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut Frank M. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/1(2000-01-01), 11-17 0957-4530 11:1<11 2000 11 10856 https://doi.org/10.1023/A:1008977416834 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008977416834 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ho¨land W. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut NATIONALLICENCE 700 1- Rheinberger V. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut NATIONALLICENCE 700 1- Wegner S. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut NATIONALLICENCE 700 1- Frank M. Ivoclar Ltd., FL-9494, Schaan, Principality of Liechtenstein aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/1(2000-01-01), 11-17 0957-4530 11:1<11 2000 11 10856 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer