The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
Apr. 28, 2009
Masaki Okubayashi, Kurashiki, JP;
Koichi Okada, Tokyo, JP;
Yusuke Takahata, Kurashiki, JP;
Keisuke Ohtsuka, Kitakyushu, JP;
Masaki Okubayashi, Kurashiki, JP;
Koichi Okada, Tokyo, JP;
Yusuke Takahata, Kurashiki, JP;
Keisuke Ohtsuka, Kitakyushu, JP;
Kuraray Noritake Dental Inc., Kurashiki-shi, JP;
JGC Catalysts and Chemicals Ltd., Kawasaki-shi, JP;
Abstract
The present invention provides a dental composition exhibiting both an excellent light diffusion property and excellent transparency, and having high mechanical strength and surface smoothness and gloss after polishing as a cured product and good handling properties as a paste. The present invention is a dental composition including: a polymerizable monomer (A); and an amorphous powder (B). The amorphous powder (B) has an average particle size of 1 to 20 μm, and includes silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The difference in refractive index between the cured product of the polymerizable monomer (A) and the amorphous powder (B) is 0.005 to 0.03.