Patent ID: 8367745
Filing Date: 2013-02-05
Classification: A61K

Abstract:
1. A dental composite resin for core build-up comprising: a first component comprising a first (meth)acrylate polymerizable resin and an organic peroxide, and a second component comprising a second (meth)acrylate polymerizable resin and a reducing agent, wherein a photopolymerizaton initiator and one or more primary fillers having an average particle size of more than 0.2 μm are included in the first component and/or the second component, one or more secondary fillers having an average particle size of 0.2 μm or less are included in the first component and/or the second component, said secondary fillers being present in the first and/or second component in an amount of no more than 15% by weight of the respective component, said secondary fillers comprising an oxide powder of a Group II element in the periodic table having an average particle diameter of 0.01 to 0.2 μm, said oxide powder of a Group II element in the periodic table being present in the first and/or second component in an amount of 0.01 to 5% by weight of the respective component, the organic peroxide is selected from the group consisting of benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, m-tolueneperoxide, t-butylperoxy benzoate, di-t-butylperoxyisophthalate, and 2,5-dimethyl-2,5 di(benzoylperoxy)hexane, and the reducing agent is at least one amine compound selected from the group consisting of N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-dimethylaniline, N,N-bis(2-hydroxyethyl)-p-toluidine, N,N-dimethylaminoethylmethacrylate, p-toluenediethanol amine, triethanol amine, p-dimethylamino methyl benzoate, p-dimethylamino ethyl benzoate, p-dimethylamino isoamyl benzoate, triethyl amine, and N-ethyldiethanol amine.