Lithium silicate glasses or glass ceramics, method for production thereof and use thereof
US-2015376053-A1 · Dec 31, 2015 · US
Lithium silicate materials
US12006247B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12006247-B2 |
| Application number | US-202117233898-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 19, 2021 |
| Priority date | Feb 8, 2005 |
| Publication date | Jun 11, 2024 |
| Grant date | Jun 11, 2024 |
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- Title
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Abstract
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Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
First claim
Opening claim text (preview).
What is claimed is: 1. A lithium silicate glass ceramic for dental restorations, wherein the lithium silicate glass ceramic comprises: SiO 2 from 64 to 75 wt %; and a main crystalline phase of lithium metasilicate; wherein the glass ceramic is suitable to be subjected to a heat treatment to convert the main crystalline phase from lithium metasilicate to lithium disilicate and the glass ceramic has a biaxial flexural strength of between 450-820 MPa. 2. The lithium silicate glass ceramic of claim 1 , comprising 64 to 73 wt % of SiO 2 . 3. The lithium silicate glass ceramic of claim 1 , wherein the lithium silicate glass ceramic is shaped into a dental restoration by machining or pressing. 4. The lithium silicate glass ceramic of claim 3 , wherein machining comprises grinding, trimming, or milling. 5. The lithium silicate glass ceramic of claim 1 , wherein the dental restoration is an inlay, an onlay, a bridge, an abutment, a facing, a veneer, a facet, a crown, a partial crown, a framework or a coping.
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Classifications
Blanks or green, unfinished dental restoration parts · CPC title
Connecting the upper structure to the implant, e.g. bridging bars (A61C8/0028 takes precedence) · CPC title
Impression means for implants, e.g. impression coping · CPC title
Alkali metal silicates ({C01B33/24} , C01B33/26 take precedence) · CPC title
Porcelain or ceramic teeth {(A61C13/081 takes precedence; preparations A61K6/80)} · CPC title
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Frequently asked questions
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- What does patent US12006247B2 cover?
- Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
- Who is the assignee on this patent?
- Ivoclar Vivadent Ag
- What technology area does this patent fall under?
- Primary CPC classification C03C10/0027. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 11 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).