High strength and translucency dental zirconia ceramic materials, devices and methods
US-10532008-B2 · Jan 14, 2020 · US
High strength and translucency dental ceramic materials, devices, and methods
US11839665B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11839665-B2 |
| Application number | US-201916707153-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2019 |
| Priority date | Feb 22, 2017 |
| Publication date | Dec 12, 2023 |
| Grant date | Dec 12, 2023 |
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Abstract
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A zirconia ceramic material for use in dental applications is provided comprising an yttria-stabilized zirconia material comprising from 4.5 mol % to 5.1 mol % yttria. Optionally, the zirconia ceramic has a coloring agent that may comprise one or more metals selected from terbium (Tb), chromium (Cr), erbium (Er), and cobalt (Co), and further, may, optionally, comprise alumina, which if present may be in an amount from 0 wt % to 0.25 wt %. The zirconia ceramic materials exhibit both enhanced translucency and a flexural strength of at least 800 MPa when fully sintered.
First claim
Opening claim text (preview).
We claim: 1. A bisque state zirconia ceramic material for use in dental applications comprising: an yttria-stabilized zirconia material comprising between 4 mol % yttria and 5.1 mol % yttria, having a relative density between 57% and 62% and median pore diameter from 40 nm to 70 nm. 2. The bisque state zirconia ceramic material of claim 1 , wherein the yttria-stabilized zirconia material comprises between 4.5 mol % yttria and 5.1 mol % yttria. 3. The bisque state zirconia ceramic material of claim 1 , wherein the yttria-stabilized zirconia material comprises between 4.6 mol % yttria and 5.1 mol % yttria. 4. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque block having an enlargement factor (EF) of less than 1.2. 5. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque body that comprises a particle size at D(50) that is from 100 nm to 300 nm. 6. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque body that comprises a porosity of less than 43%. 7. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque body that comprises a porosity of 38% to 43%. 8. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque body that comprises a porosity of 38% to 42%. 9. The bisque state zirconia ceramic material of claim 1 , wherein the zirconia ceramic material is in the form of a bisque body that comprises a porosity of 38% to 41%.
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Classifications
Pore diameter · CPC title
Pore volume · CPC title
Nanometer sized, i.e. from 1-100 nanometer · CPC title
Solid density · CPC title
Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title
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- What does patent US11839665B2 cover?
- A zirconia ceramic material for use in dental applications is provided comprising an yttria-stabilized zirconia material comprising from 4.5 mol % to 5.1 mol % yttria. Optionally, the zirconia ceramic has a coloring agent that may comprise one or more metals selected from terbium (Tb), chromium (Cr), erbium (Er), and cobalt (Co), and further, may, optionally, comprise alumina, which if present …
- Who is the assignee on this patent?
- Glidewell James R Dental Ceramics Inc
- What technology area does this patent fall under?
- Primary CPC classification A61K6/818. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Dec 12 2023 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 11 related publications on this page (citations in our corpus or others sharing the same primary CPC).