Kuraray Noritake Dental Inc.

Toshio Sakakibara

Kazuhiro Yamada

Atsushi Matsumoto

Kiyoko Ban

Yuta Tajima

Tatsuhiko Hirata

The present invention provides a dental product comprising a base material formed of a zirconia sintered body, and having high aesthetic quality with enhanced fracture toughness and with reduced chipping and cracking in the porcelain layer. The present invention also provides a method for manufacturing such a dental product. The present invention relates to a dental product comprising: a base material formed of a zirconia sintered body, and a porcelain layer, wherein the porcelain of the porcelain layer has a suitable firing temperature of 900&#xb0; C. or more, and the porcelain layer has a fracture toughness value of 1.20 MPa&#xb7;mor more.

Dental product with enhanced toughness

The present invention provides a silicate glass that can reduce a color change in base material zirconia even when simultaneously fired with an unsintered zirconia. The present invention also provides a dental product using same. The present invention relates to a silicate glass comprising: 65.0 to 90.0 mol % SiO, 4.0 to 15.0 mol % AlO, 1.0 to 10.0 mol % KO, 0.1 to 7.0 mol % NaO, and 0.01 to 15.0 mol % CaO, the silicate glass being essentially free of BO, and satisfying the relation {(number of moles of AlO)/(total number of moles of RO+RO)}&#x2265;0.70, wherein R in the metal oxide represented by RO represents a metallic element in group 2 or 12 of the periodic table, and R in the metal oxide represented by RO represents a metallic element in group 1 of the periodic table. The present invention also relates to a composite comprising the silicate glass and a base material formed of a ceramic; a sintered body as a fired product of the composite; and a dental product comprising the sintered body.

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Aichi, Japan

Toshio Sakakibara