Abstract: A denture base separating material is disclosed, comprising an aqueous emulsion obtained by emulsion polymerization of methacrylic ester, acrylic ester, or acrylonitrile alone, or a mixed solution of two or more thereof, in the presence of a water-soluble radical polymerization initiator and a surfactant, the monomer composition of which is adjusted such that the minimum film-forming temperature is 23.degree. C. or lower having an appropriate adhesion and being able to be readily removed from the tissue conditioner, being easily confirmed at the time of application, being from dry spots and cracks on the denture surface, and not generating malodors.

Abstract: A combined chemical-/light-polymerization type composition for dental restoration consists of a formulation A composed main of a. an ethylenically polymerizable unsaturated compound, b. a photo-polymerization initiator and c. a reducing agent, and a formulation B composed mainly of d. a filler and e. an organic peroxide. The formulations A and B are separately packaged and designed to be mixed for use.

Abstract: A resinous composition for denture base, having improved performance suitable for microwave curing comprises (i) a powdery component containing as the main constituents a methacrylate ester polymer having a mean particle size of 50 to 120 microns, a barbituric acid derivative and an organic peroxide, and (ii) a liquid component containing as the main constituents a monomethacrylate ester monomer, a cross-linking agent and a quaternary ammonium chloride.

Abstract: A light curing composition for dental restoration comprises (a) a polymerizable compound containing at least one ethylenically unsaturated double-bond, (b) at least one photo-polymerization initiator selected from ketal base compounds defined hereinafter, (c) at least one photopolymerization initiator selected from thioxanthone base compounds defined hereinafter, (d) a reducing agent and (e) a filler.

Abstract: A combined chemical-light-polymerization type composition for dental restoration consists of a formulation A composed mainly of a. an ethylenically polymerizable unsaturated compound, b. a photopolymerization initiator and c. a reducing agent, and a formulation B composed mainly of d. a filler and e. an organic perioxide. The formulations A and B are separately packaged and designed to be mixed for use.

Abstract: A light curing composition for dental restoration comprises (a) a polymerizable compound containing at least one ethylenically unsaturated double-bond, (b) at least one photo-polymerization initiator selected from ketal base compound as defined herein, (c) at least one photo-polymerization initiator selected from anthraquinone base compounds as defined herein, (d) a reducing agent and (e) a filler.

Abstract: A novel light curing composition for dental restoration comprises (a) a polymerizable compound containing at least one ethylenically unsaturated double-bond, (b) at least one photo-polymerization initiator selected from ketal base compounds defined hereinafter, (c) at least one photo-polymerization initiator selected from benzoin alkyl ether base compounds defined hereinafter, (d) a reducing agent and (e) a filler.

Abstract: A coating material for protecting the surfaces of teeth is obtained by dissolving a resinous composition comprising 100 weight parts of a polystreyene resin or a high-impact polystyrene resin and 1 to 60 weight parts of rosin or a rosin derivative added thereto in an organic solvent. The resinous composition may further contain 1 to 100 weight parts of a chlorinated polymer and 1 to 100 weight parts of a coloring matter.