Back to results
US 2020/0375707 A1Published application
Lithium silicate materials
AssigneeIvoclar Vivadent AG
InventorsMarcel Schweiger, Volker Rheinberger, Harald Bürke, Wolfram Höland, Elke Signer-Apel, Christian Ritzberger, Dmitri Brodkin
Life of this patent
Estimating the term…
Abstract
Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools.
Claims11
A lithium silicate dental glass-ceramic article for producing a dental restoration comprising:
- metasilicate as the main crystalline phase with 20-50 vol % lithium metasilicate crystalline phase and exhibiting a biaxial flexural strength of at least 90 MPa measured according to ISO 6872.
A lithium silicate dental glass-ceramic article for producing a dental restoration comprising:
- 20-50 vol % lithium metasilicate crystalline phase, exhibiting edge strength with a fracture toughness of at least 0.8 MPam0.5 and a biaxial flexural strength of at least 90 MPa measured according to ISO 6872.
A lithium silicate dental glass-ceramic article for producing a dental restoration comprising:
- an initial phase comprising metasilicate as the main crystalline phase with 20-50 vol % lithium metasilicate crystalline phase and exhibiting a biaxial flexural strength of at least 90 MPa measured according to ISO 6872, the initial phase is millable and sinterable to a dental restoration exhibiting a final lithium disilicate phase having a biaxial flexural strength between 250-472 MPa+/−85 measured according to ISO 6872.
Dependencies are inferred from the claim text.