Process for the preparation of dental restorations
AssigneeIvoclar Vivadent AG
InventorsChristian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
Life of this patent
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Abstract
The invention relates to a process for preparing dental restorations, wherein a lithium silicate glass ceramic or a lithium silicate glass is used which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
Claims21
Lithium silicate glass ceramic, which comprises at least 14.0 wt.-% transition metal oxide selected from the group consisting of oxides of Y, Nb, La, Ta, W and mixtures of these oxides and further comprises lithium metasilicate or lithium disilicate as main crystal phase.
Lithium silicate glass ceramic, which comprises at least 14.0 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides and further comprises lithium metasilicate or lithium disilicate as main crystal phase, which comprises at least one further oxide of pentavalent elements, wherein the at least one further oxide of pentavalent elements comprises Bi2O5.
Lithium silicate glass, which comprises at least 14.0 wt.-% transition metal oxide selected from the group consisting of oxides of Y, Nb, La, Ta, W and mixtures of these oxides and further comprises nuclei which are suitable for forming lithium metasilicate or lithium disilicate crystals as main crystal phase.
Lithium silicate glass ceramic, which comprises at least 18.0 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides and further comprises lithium metasilicate or lithium disilicate as main crystal phase.
Lithium silicate glass, which comprises at least 18.0 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides and further comprises nuclei which are suitable for forming lithium metasilicate or lithium disilicate crystals as main crystal phase.
Dependencies are inferred from the claim text.