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Abstract

Disclosed is a dental material comprising a sulfur-containing unsaturated carboxylic acid ester compound having a substituent containing a sulfur atom and at least two (meth)acrylic acid residues through an oxygen atom bonded to a secondary or tertiary carbon atom, specifically, a dental material comprising a polymerizable monomer (A) represented by the following formula (1): 1 wherein R.sub.11 is a divalent organic group, X.sub.11 is an oxygen atom, a sulfur atom, --COO-- group or --(CH.sub.2).sub.qX.sub.12-- group (X.sub.12 is an oxygen atom or a sulfur atom, and q is an integer of 1 to 3), R.sub.12 is a hydrogen atom or an alkyl group, R.sub.13 is a substituent containing a sulfur atom, and R.sub.14 is a hydrogen atom or a methyl group, or a dental material comprising a polymerizable monomer (A) which is liquid at ordinary temperature and has a viscosity of 100 to 1,000,000 cps. Also disclosed is a dental composition comprising the polymerizable monomer (A), a polymerization initiator (B) and a filler (C). The dental material and the dental composition are excellent in X-ray opacity, transparency, curability and stain resistance, and they have small polymerization shrinkage.

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First Claim