Lithium silicate glass ceramic for manufacturing dental restoration e.g. inlay, onlay, bridge, abutment or facet comprises silicon dioxide, lithium oxide, potassium oxide, aluminum oxide, nucleating agent, zinc oxide

摘要: A lithium silicate glass ceramic comprises (wt.%): silicon dioxide (64.0 - 75.0, preferably 64.0 73.0), oxide (13.0 17.0), potassium (2.0 5.0), aluminum (0.5 nucleating agent zinc (less than 0.1) and at least one (upto 3.0) of calcium, barium, magnesium or strontium. An independent claim is included for preparation (P1) metasilicate involving: a) producing a starting containing the components ceramic; b) subjecting to first heat treatment temperature give product which contains nuclei forming crystals; c) second higher form with as main crystalline phase.