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LITHIUM SILICATE MATERIALS

  • US 20080120994A1
  • Filed: 11/05/2007
  • Published: 05/29/2008
  • Est. Priority Date: 08/07/2003
  • Status: Active Grant
First Claim
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1. A process for manufacturing a lithium silicate restoration comprising preparing a lithium silicate blank which comprises(a) producing a melt of a starting glass containing the initial components SiO2, Li2O, K2O, Al2O3 and P2O5 as the main components(b) pouring the melt of the starting glass into a mould to form a starting glass blank and cooling the glass blank to room temperature,(c) subjecting the starting glass blank to a first heat treatment at a first temperature to give a glass product which contains nuclei suitable for forming lithium metasilicate crystals,(d) subjecting the glass product of step (c) to a second heat treatment at a second temperature which is higher than the first temperature to obtain the lithium silicate blank with lithium metasilicate crystals as the main crystalline phase,and(e) shaping the lithium silicate blank into a dental restoration.

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