Dental curable composition and artificial tooth
AssigneeShofu Inc.
InventorsMikito Deguchi, Hiroyuki Shioi, Akihiro Nagafuji
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Abstract
The present invention provides a dental curable material suitable for a production of an artificial teeth having a strong toughness, wear resistance, transparency and moldability, which comprises a silane-treated silica uniformely dispersed in urethane (meth)acrylate (a): said silica has a 1 to 85 nm, with at least one silane compound represented by the formula (1): YnSiX.sub.4-n (1) wherein Y is a hydrocarbon group or a reactive group containing a vinyl-polymerizable group; X is a hydrolyzable group; and n is an integer of 1, 2 or 3, and is uniformly dispersed in a urethane (meth)acrylte (b).
Claims19
A dental curable composition comprising:
- a component which consists essentially of an urethane (meth)acrylate and a silane treated colloidal silica uniformly dispersed holding the state of non-agglomerated primary particle therein, which is obtained by a process comprising the steps of:
- treating a colloidal silica having an average primary particle size of from 1 to 85 nm with at least one silane compound represented by formula (I):
- YnSiX.sub.n"4
- wherein Y is a hydrocarbon group or a reactive group containing a vinyl polymerizable group;
- X is a hydrolyzable group;
- and n is an integer of 1, 2, or 3;
- and
- dispersing the silane-treated silica in the urethane (meth)acrylate uniformly.
A dental curable composition of claim 2 which comprises,
- (a) the component of claim 1, 34-68% by weight,
- (b) a polymerizable monomer 17-51% by weight, and
- (c) a poly(alkyl(meth)acrylate) 15-20% by weight, and additionally
- (d) a polymerization initiator 0.1-3.0% by weight based on the total weight of (a), (b) and (c).
A dental curable composition of claim 3 which comprises,
- (a) the component of claim 1, 34-68% by weight,
- (b) a polymerizable monomer 17-51% by weight, and
- (c) a poly(alkyl(meth)acrylate) 15-20% by weight, and additionally
- (d) a polymerization initiator 0.1-3.0% by weight based on the total weight of (a), (b) and (c).
Dependencies are inferred from the claim text.