Lithium disilicate-apatite glass-ceramic
AssigneeIvoclar Vivadent AG
InventorsChristian Ritzberger, Wolfram Holand, Marcel Schweiger, Volker Rheinberger
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Abstract
Lithium disilicate apatite glass-ceramics are described which are characterized by a high chemical stability and can therefore be used in particular as restoration material in dentistry.
Claims33
Lithium disilicate apatite glass-ceramic, which comprises lithium disilicate as main crystal phase and apatite as further crystal phase and which comprises 3.0 to 7.0 wt.-% K2O, 0 to 5.0 wt.-% CaO and 0 to 4.0 wt.-% SrO, wherein the combined amount of CaO and SrO is 1.0 to 6.0 wt.-%.
Lithium disilicate apatite glass ceramic, which comprises lithium disilicate as main crystal phase and apatite as further crystal phase and which comprises 3.0 to 7.0 wt.-% K2O and which comprises more than 20 vol.-% lithium disilicate crystals.
Lithium metasilicate glass-ceramic, which comprises lithium metasilicate as main crystal phase and apatite as further crystal phase and which comprises 3.0 to 7.0 wt.-% K2O, 0 to 5.0 wt.-% CaO and 0 to 4.0 wt.-% SrO, wherein the combined amount of CaO and SrO is 1.0 to 6.0 wt.-%.
Lithium disilicate apatite glass-ceramic, which comprises lithium disilicate as main crystal phase and apatite as further crystal phase and which comprises 3.5 to 6.0 wt.-% K2O.
Lithium disilicate apatite glass-ceramic, which comprises lithium disilicate as main crystal phase and apatite as further crystal phase and which contains 4.0 to 6.0 wt.-% P2O5 and 3.0 to 7.0 wt.-% K2O.
Dependencies are inferred from the claim text.