Patent ID: 8592330

Claim:
Method for veneering dental restorations comprising yttrium-stabilized zirconium dioxide with a veneer ceramic comprising the following components a) SiO 2 58.0-74.0 percent by weight b) Al 2 O 3 4.0-19.0 percent by weight c) Li 2 O 5.0-17.0 percent by weight d) Na 2 O 4.0-12.0 percent by weight e) ZrO 2 0.5-6.0 percent by weight, and comprising lithium disilicate as a main crystal phase, characterized by the following method steps: a) a glass fused at 1530° C. and comprising the following components SiO 2 58.0-74.0 percent by weight Al 2 O 3 4.0-19.0 percent by weight Li 2 O 5.0-17.0 percent by weight Na 2 O 4.0-12.0 percent by weight ZrO 2 0.5-6.0 percent by weight, is fritted in water; b) the fritted glass is tempered for nucleation at a temperature of 500° C. to 680° C. for 2 to 6 hours; c) after cooling, the tempered glass is mechanically pulverized; d) the pretreated powder is converted to paste with the addition of water; e) the paste is applied to the restorations comprising yttrium-stabilized zirconium dioxide and f) is then subjected to a heat treatment at 800° C. to 940° C., wherein lithium disilicate is crystallized out as main crystal phase to form the veneer ceramic.