Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.

Abstract: An occlusal wear evaluation apparatus capable of quantitatively evaluating an occlusal wear of a used denture reads three dimensional data of the denture before use and three dimensional data of the denture after use. The apparatus calculates a difference in a set value of an articulator allowing a maxillary dental arch and a mandibular dental arch of the denture to occlude between the denture before use and the denture after use, by way of simulating movements of a jaw in the articulator with the three dimensional data of the denture before use and the three dimensional data of the denture after use, and indicates the calculated difference.

Abstract: The compression molded tooth used for practicing dental cutting treatment of the present invention comprises a composition containing a powder or powders of saccharide, polysaccharide, protein, and/or glycoprotein each having a particle size of 1 to 100 ?m.

Abstract: The present invention relates to a polymerization catalyst having storage stability under an oral cavity environment. Furthermore, the present invention relates to a dental material cured by use of the present polymerization catalyst. The polymerization catalyst for use in the dental material is achieved with including 1-cyclohexyl-5-propylbarbituric acid and trioctylmethylammonium chloride.

Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes in order of a mixed polymerizable monomer preparing step, a mixed polymerizable monomer preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.

Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.

Abstract: There is provided a dental composition comprising at least one kind of filler and resin matrix, wherein the at least one kind of filler comprises a population of particles, wherein the population of particles has an average particle size from 110 to 500 ?m, the maximum particle size of the population of particles is less than 1.4 times the average particle size, and the D30 of particle size distribution of the population of particles is no less than 0.9 times the average particle size.

Abstract: An occlusal wear evaluation apparatus capable of evaluating quantitatively an occlusal wear of a used denture reads three dimensional data of a denture before use and three dimensional data of the denture after use. The apparatus calculates a difference in a set value of an articulator allowing the maxillary dental arch and the mandibular dental arch of the denture to occlude between the denture before use and the denture after use, by way of simulating movements of a jaw in the articulator with the three dimensional data of the denture before use and the three dimensional data of the denture after use, and indicates the calculated difference.

Abstract: Provided is a dental composition comprising a first largest group of particles and resin matrix, wherein the first largest group consists of particles whose particle size ranges from 0.7 to 1.5 times the representative particle size of the first largest fraction in a population of particles included in the composition whose particle size ranges from 110 to 1000 ?m; and wherein the ratio of the number of particles included in the first largest group to the number of particles whose particle size ranges from 0.5 to 2.0 times the representative particle size of the first largest fraction is equal to or more than 0.8.

Abstract: An occlusion evaluation apparatus capable of evaluating a masticatory ability depending on an occlusal geometry of teeth without actually used by a human subject, reads three dimensional data of geometries of maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8, and specifies a geometry of a fluxion space Va defined by a plane Sa which includes two adjacent contact points Pa between the maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8 and which is perpendicular to the occlusal plane, the occlusal surfaces of the maxillary molar teeth 1, 2, 3, 4, and the occlusal surfaces of the mandibular molar teeth 5, 6, 7, 8.

Abstract: An occlusal wear evaluation apparatus capable of evaluating quantitatively an occlusal wear of a used denture reads three dimensional data of a denture before use and three dimensional data of the denture after use, calculates a difference in a set value of an articulator allowing the maxillary dental arch and the mandibular dental arch of the denture to occlude between the denture before use and the denture after use, by way of simulating movements of a jaw in the articulator with the three dimensional data of the denture before use and the three dimensional data of the denture after use, and indicates the calculated difference.

Abstract: An occlusion evaluation apparatus capable of evaluating a masticatory ability depending on an occlusal geometry of teeth without actually used by a human subject, reads three dimensional data of geometries of maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8, and specifies a geometry of a fluxion space Va defined by a plane Sa which includes two adjacent contact points Pa between the maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8 and which is perpendicular to the occlusal plane, the occlusal surfaces of the maxillary molar teeth 1, 2, 3, 4, and the occlusal surfaces of the mandibular molar teeth 5, 6, 7, 8.

Abstract: This invention discloses a carbide bar for a dental rotary instrument which eliminates defects of the prior art. In the prior art, blades of the carbide bar are twisting on to rightward from a bottom to a top portion and this twisting offers some inconvenience such as detaching connection between hand piece and the bar during rotation work and stacking of cutting dusts for ill efficiency. This invention has now developed a new method for the blades, which should be twisted leftward from the bottom to the top to clear the submitted inconvenience.