MACHINABLE PREFORM FOR SHAPING INTO DENTAL RESTORATION MATERIAL

WIPO Patent Application WO/2021/132290

A1

The present invention is a dental zirconia sintered body that does not require coloring and firing after shaping and has aesthetic properties. A preform (100) is provided with a body (101) and a stem (102). The body (101) is machinable and has a Vickers hardness of 4-20 HV (GPa). The stem (102) has a width of 4 mm or less at a position protruding from a central portion (111) of the body (101). At the position, the cross-sectional geometric shape of the central portion (111) has an inscribed circle having a diameter of more than 12 mm and a circumscribed circle having a diameter of less than 20 mm. The body (101) varies in color from an upper end portion (113) to a lower end portion (105). The trend of increase or decrease in (L*, a*, b*) in the L*a*b* color system does not vary from the upper end portion (113) to the lower end portion (105). The preform (100) can be shaped into a dental restoration material such as a crown.

WO/2022/065559	DENTAL BULK BLOCK FOR MACHINING AND MANUFACTURING METHOD THEREFOR
WO/2016/138994	BLANK FOR PRODUCING DENTAL REPLACEMENT PARTS, SAID BLANK HAVING A DENTINE ZONE WHICH IS EMBEDDED IN AN ENAMEL ZONE
WO/2022/136969	METHODS OF MAKING ARTICLES INCLUDING INKJET PRINTING SOLS CONTAINING METAL OXIDE NANOPARTICLES

KATO SHINICHIRO (JP)

PCT/JP2020/048058

July 01, 2021

December 22, 2020

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KURARAY NORITAKE DENTAL INC (JP)

A61C13/083; A61C5/70

WO2019131782A1

2019-07-04

JP2017077454A	2017-04-27
JP2014218389A	2014-11-20
US20180237345A1	2018-08-23

KAMADA Koichi et al. (JP)

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