Pre-sintered ceramic block for dental restoration, preparation method therefor and use thereof
AssigneeShenzhen Upcera Dental Technology Co., Ltd.
InventorsLingling HE, Guoyi SONG, Cheng HOU, Chengwei HAN, Zhongliang ZHAO, Jialing LI
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Abstract
Disclosed is a pre-sintered ceramic block for a dental restoration, which has a low pre-sintering temperature, contains a silica main crystal phase, but does not contain or contains a small amount of lithium metasilicate crystal phase. The pre-sintered ceramic block has a low hardness, with a Vickers hardness of 0.5-3 GPa, which is significantly lower than that of a ceramic block containing a lithium metasilicate crystal phase, and same is suitable for dry machining and also wet machining when being machined into a dental restoration. (FIG. 2)
Claims21
A pre-sintered ceramic block for a dental restoration, wherein the pre-sintered ceramic block
- contains a silica main crystal phase,
- has a Vickers hardness of 0.5-3 GPa, and
- is opaque.
A pre-sintered ceramic block for a dental restoration, wherein the pre-sintered ceramic block
- contains a silica main crystal phase,
- has a Vickers hardness of 0.5-3 GPa,
- is opaque, and
- exhibits a gradual transmittance and/or color after dense-sintering of 800-1100° C.
(canceled)
Dependencies are inferred from the claim text.