Abstract: To photograph teeth and dental shade guides including marks indicating color tones of a color samples together in large size and particularly, without making the photographing distance far from the teeth, irrespective of the color samples to plate-shaped handle parts, in the dental shade guide, has a color sample modeling a form of an artificial tooth of an anterior tooth and a tag having a mark indication part are attached at one end of a plate-shaped handle part rotatably around an axis, the tag is attached at a lingual surface side of the color sample, and the mark indication part protrudes 1 to 15 mm at the maximum only from a tooth root directional end or side of the color sample.

Abstract: To photograph teeth and dental shade guides including marks indicating color tones of a color samples together in large size and particularly, without making the photographing distance far from the teeth, irrespective of the color samples to plate-shaped handle parts, in the dental shade guide, has a color sample modeling a form of an artificial tooth of an anterior tooth and a tag having a mark indication part are attached at one end of a plate-shaped handle part rotatably around an axis, the tag is attached at a lingual surface side of the color sample, and the mark indication part protrudes 0.1 to 15 mm at the maximum only from a tooth root directional end or side of the color sample.

Abstract: To provide a base material for a prosthesis having abrasion resistance and aesthetic appreciation more than equivalent to those of a conventional artificial tooth and to make a bridge and an artificial tooth for a partial denture easily in a short time without cutting adjacent teeth, the base material is made of a resin material, and comprises only a part having a form approximating to a lingual side surface part of the teeth being at the oral cavity side from a mucous of a dental cervix, two to four teeth may be connected, a thickness of the lingual side surface part is 0.5 mm or more from the lingual side surface and less than 0.5 mm from a labial surface of a teeth form being made finally, a surface contacting with a mucous surface of the dental cervix is formed and an engaging part connecting with a resin material built on a labial side surface is formed.

Abstract: To provide a prosthesis like an artificial tooth capable of forming the bridge directly and having abrasion resistance and aesthetic equivalent to or more than those of a conventional artificial tooth in a short time and without cutting proximal teeth, said prosthesis is made of a resin material and comprises one tooth or teeth connected two to four teeth, which are approximating to the teeth at the oral cavity side from a mucous of a dental cervix part, and recessed parts are formed at proximal surfaces of its both sides, and further, a part where some at the labial surface side is deleted in the thickness almost corresponding to the thickness of an enamel in a natural tooth and a part where some at the occlusal surface side is deleted in the thickness almost corresponding to the thickness of an enamel in a natural tooth, may be formed.

Abstract: A crown prosthesis having a wear resistance and an aesthetic property that are equivalent to those of the conventional hard resin, and being able to be fixed inside the oral cavity in a short time to form a dental prosthesis, without necessity of careful formation of an abutment tooth under consideration of the shape and the structure of the dental prosthesis to be produced later. It also offers no necessity of indirect production of the dental prosthesis outside the oral cavity, the crown prosthesis comprising a polymer of a mixture of a polymerizable compound having an unsaturated double bond, a filler and a polymerization initiator, and having an outer shape resembling a tooth and a space to be filled with a dental composite resin between an inner surface thereof and an abutment tooth, preferably having a thickness of 0.1 to 2 mm, and having, in its inside space, a protrusion having a slot or a hole, for engaging or inserting a post implanted on a tooth root of a remaining tooth.

Abstract: A prosthesis for a tooth surface, which requires neither careful formation of an abutment tooth nor indirect production of the dental prosthesis outside the oral cavity, and can be fixed inside the oral cavity in a time, the prosthesis having a shape resembling a labial side surface of an anterior tooth, a buccal side surface and an approximal surface or an occlusal surface of a molar tooth, or a buccal surface or an approximal surface and an occlusal surface of a molar tooth, a back surface thereof being attached to a lingual side tooth formed by constructing with a lingual side tooth forming resin material on an abutment tooth, and comprising a polymer of a mixture of a polymerizable compound having an unsaturated double bond, a filler and a polymerization initiator. The prosthesis may be a veneering type having a thickness of 0.

Abstract: A dental restorative composition is disclosed, comprising: (a) a methacrylate or acrylate monomer, (b) an organic-inorganic composite filler prepared by curing a mixture of a particulate filler having a mean particle size of 20 nm or less with a methacrylate or acrylate monomer having a viscosity of 60 cP or more and pulverizing the cured mixture, (c) a particulate filler having a mean particle size of 20 nm or less, and (d) a polymerization initiator, and further, if desired, (e) a glass powder having a maximum particle size of 5 &mgr;m or less and having a mean particle size of from 0.5 to 2 &mgr;m. The dental restorative composition according to the invention gives restorations having surface smoothness and transparency similar to natural teeth, having superior esthetics and superior physical properties such as bending strength and bending strain energy characteristics, and being provided with easy polishing.

Abstract: A metal surface treatment agent is disclosed, comprising: (a) from 0.001 to 10% by weight of a polymerizable monomer containing a thiophosphoric acid chloride group therein and (b) from 0.001 to 10% by weight of a polymerizable monomer containing a phosphoric acid ester group therein, and optionally, (c) from 0.1 to 5% by weight of a polymerization initiator dissolved in an organic solvent.

Abstract: A dental bonding method comprises the steps of treating enamel and dentine with a tooth surface-treating material containing organic acid, iron or copper salt, and water, followed by water washing and drying; applying on the thus treated surface a primer containing organic acid, water, and hydrophilic methacrylate, followed by drying; and applying on the thus coated surface a dental bonding material containing methacrylate or acrylate having at least one unsaturated double bond, and polymerization initiator optinally with carbodiimide compound, for surface curing.

Abstract: A compound having a carbodiimide in its molecule is incorporated in a dental adhesive composition. With this composition, dental composite material can be firmly bonded to the enamel and dentin of a tooth, thereby avoiding formation of a gap which may otherwise cause secondary caries.

Abstract: A composition for dental restorative material comprises a methacrylate or acrylate monomer, a specific organic/inorganic composite filler, a specific glass powder component having a specific particle diameter, a fine-particle filler having a specific particle diameter and a photopolymerization initiator, this composition being as excellent in surface smoothness as natural teeth, is less shrinkable by polymerization so that no gap can occur between the restorative material and the tooth having roentgenographic properties.

Abstract: A method for treating a tooth surface to make it bondable well enough for dental purposes involves treating enamel and dentin with a primer comprising a) an organic acid, b) an iron, copper or cobalt salt and c) water, and then curing the tooth surface with a bonding material comprising d) a methacrylate or acrylate having at least one unsaturated double bond, e) a (thio)barbituric acid derivative and f) a polymerization initiator.

Abstract: An agent is characterized by containing a polymerizable monomer having a thiophosphoric acid dichloride group. By applying this agent to the surfaces of noble metals, much more durable and increased bond strength is obtained.

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 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.