Abstract: To enables a technician for dental care to grasp the risk of dental caries of a patient and show its state to the patient in an easily understandable way, a risk check sheet for dental caries is constituted of a list sheet provided with three kinds of risk items consisting of a risk of dental caries caused by a resistance, a risk of dental caries caused by intra-oral bacteria, and a risk of dental caries caused by eating habit, each having a plurality of check items, as to each of which one from a plurality of selection items having different ranks is to be alternatively selected, and numericalizing data of the risks of dental caries from by summing up evaluation scores given in the selection items for each risk item; and a chart sheet provided with a standard circle centering around an origin and having indicator circles provided radially with a distance of 120 degree centering around the origin from each other and allocated for data of the three kinds of risks of dental caries based on the numerical data by

Abstract: To enables a technician for dental care to grasp the risk of dental caries of a patient and show its state to the patient in an easily understandable way, a risk check sheet for dental caries is constituted of a list sheet provided with three kinds of risk items consisting of a risk of dental caries caused by a resistance, a risk of dental caries caused by intra-oral bacteria, and a risk of dental caries caused by eating habit, each having a plurality of check items, as to each of which one from a plurality of selection items having different ranks is to be alternatively selected, and numericalizing data of the risks of dental caries from by summing up evaluation scores given in the selection items for each risk item; and a chart sheet provided with a standard circle centering around an origin and having indicator circles provided radially with a distance of 120 degree centering around the origin from each other and allocated for data of the three kinds of risks of dental caries based on the numerical data by

Abstract: A dental glass ionomer cement composition comprises:(a) 5 to 100 parts by weight of a polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000,(b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 .mu.m and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000",(c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH.sub.2 .dbd.C(R1)--COO--group wherein R1=H or CH.sub.3,(d) 0.01 to 5 parts by weight of a polymerization catalyst,(e) 2 to 50 parts by weight of water,(f) 0.01 to 20 parts by weight of a surface active agent, and(g) 0.01 to 5 parts by weight of a reducing agent, and optionally h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 .mu.

Abstract: A fluoroaluminosilicate glass powder for dental glass ionomer cements has a specific gravity of 2.4 to 3.5 and a mean particle size of 0.02 to 10 .mu.m, contains in its components 20 to 50% by weight of SiO.sub.2, 20 to 40% by weight of Al.sub.2 O.sub.3, 15 to 40% by weight of SrO, 1 to 20% by weight of F.sub.2 and 0 to 15% by weight of P.sub.2 O.sub.5 on the converted oxide basis, and is substantially free from alkali metal ions such as Li, Na, K, Rb and Cs ions, and Be, Mg (and Ca) and Ba ions of alkali earth metal ions. For further improvements in physical properties, 100 parts by weight of the glass powder are surface-treated with 0.01 to 5 parts by weight of an acid and/or a fluoride.

Abstract: A gypsum composition for denture investment comprises 100 parts by weight of a mixture of 50-90 parts by weight of .alpha.-Gypsum hemihydrate (.alpha.-CaSO.sub.4.1/2H.sub.2 O) with 10-50 parts by weight of .beta.-Gypsum hemihydrate (.beta.-CaSO.sub.4.1/2H.sub.2 O) and 0.2-2.0 parts by weight of a soluble potassium salt and 0.5-3.0 parts by weight of mannitol. As the soluble potassium salt, use may be made of one or more of potassium sulfate, potassium chloride and potassium tartrate. The gypsum composition may further include 0.5-5.0 parts by weight of dihydrate gypsum.

Abstract: A gypsum composition for denture investment consists of 100 parts by weight of a mixture of 50-90 parts by weight of .alpha.-Gypsum hemihydrate (.alpha.-CaSO.sub.4.1/2H.sub.2 O) with 10-50 parts by weight of .beta.-Gypsum hemihydrate (.beta.-CaSO.sub.4.1/2H.sub.2 O) and 0.2-2.0 parts by weight of a soluble potassium salt. As the soluble potassium salt, use may be made of one or more of potassium sulfate, potassium chloride and potassium tartrate. The gypsum composition may further include 0.5-5.0 parts by weight of dihydrate gypsum.