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 filling composition for dental temporary sealing comprises a component A defined by a puttied base agent composition wherein a base agent containing a water-insoluble liquid acidic phosphate and/or a water-insoluble organic carboxylic acid that is liquid at room temperature contains 5.0 to 50.0 % by weight of finely divided silica, and a component B defined by a puttied setting agent composition wherein a setting agent containing a reactive multi-valent metal salt containing 1.0 to 20.0 % by weight of a finely divided inorganic filler having a solubility of 0.2 or less at 20.degree. C.

Abstract: A dental zinc oxide eugenol cement composition which is used in dentistry as the temporary sealing material having a anodyne, sedative and antiphlogistic effect upon oral disease and the temporary cementing material for restorations comprising in combination a putty-form base agent composition wherein 5.0 to 50.0% by weight of silicic acid are contained in an eugenol-containing base agent composition, and a putty-form setting agent composition wherein 0.5 to 15.0% by weight of an inorganic filler material which has a solubility of up to 0.2 g per 100 ml of water at 20.degree. C. are contained in a zinc oxide-containing setting agent composition.

Abstract: A dental cement comprising a cement powder to which are added one or more of tannic acid derivatives consisting of the group of a tannic acid-protein combination, a tannic acid-formaldehyde combination, acetyl tannate and a metal salt of tannic acid, said tannic acid derivatives being sparingly soluble in water.