Results 171 to 180 of about 7,786 (229)

Studies on polycarboxylates and related cements 4. Properties of cements

Journal of Dentistry, 1979
Abstract The mechanical properties, setting times, apparent pH of setting cements, solubility, film thickness and adhesion to enamel and dentine have been determined for a range of zinc polycarboxylate cements. The properties are discussed in relation to the suitability of the cements as linings and luting agents.
B W, Bertenshaw, E C, Combe, A A, Grant
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Sealing quality of instruments cemented in root canals with polycarboxylate cements

Journal of Endodontics, 1975
Stainless steel files were cemented in place as the master cone with Durelon, PCA, and Proco-sol. The treated teeth were immersed in, dye; after 2, 4, 8, and 16 days, they were examined for evidence of dye penetration. The depth of dye penetration for each group was compared with the use of the t test.
G N, Barry, R A, Heyman, I L, Fried
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Pulp Reaction to a Polycarboxylate Cement in Monkeys

Journal of Dental Research, 1974
Pulp response to a polycarboxylate cement was evaluated microscopically in 48 teeth with intact dentin floors, and in 55 teeth with exposed pulps. The innocuous effect of polycarboxylate cements on the pulp was substantiated, although its use for pulp capping is not recommended.
A H, el-Kafrawy, D M, Dickey, D F, Mitchell, R W, Phillips   +3 more
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Reinforced polycarboxylate cements.

Journal of dental research, 1975
Mechanical properties of polycarboxylate cements are greatly improved by incorporation of high modulus fibers such as potassium titanate into acrylic-itaconic acid and acrylic-itaconic-acronitic acid copolymers. Other desirable properties of the cements are not changed by the addition of fibers.
J A, Barton, G M, Brauer, J M, Antonucci, M J, Raney   +3 more
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Application of polycarboxylate in low cement castables

Materials Research Innovations, 2015
The performance of low cement castable with polycarboxylate was studied by comparing the effects of polycarboxylate superplasticisers KS-JS70 and LMS-P and sodium tripolyphosphate on castable samples. The fluidity, bulk density, apparent porosity, compressive strength and bending strength of the castable samples at room temperature were determined, and
T. S. He, Z. K. Li
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Some Mechanical Properties of Dental Polycarboxylate Cements

Polymer-Plastics Technology and Engineering, 1993
Abstract The mechanical properties of three commercial zinc polycarboxylate dental cements were studied. The interaction of these cements with tooth structure was investigated by following the change in their tensile and shear stress. The results also showed that the cements may interact with dentin but to a lower extent than with enamel.
F. A. Saadalah, M. A. Moharram, R. M. Ibrahim   +2 more
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Calcium hydroxide-modified zinc polycarboxylate dental cements

Ceramics International, 2013
Abstract In this research, the effects of calcium hydroxide addition to zinc polycarboxylate cements have been studied on microstructural properties, setting time, pH changes and compressive strength. The results indicated that the setting time of the resultant cements increased with increase in the calcium hydroxide content to the cement matrix ...
Ali Zamanian, Mana Yasaei, Maryam Ghaffari, Masoud Mozafari   +3 more
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Influence of talc on the properties of polycarboxylate cement

Journal of Oral Rehabilitation, 1997
summary Zinc oxide, the inorganic component of polycarboxylate cement, was mixed with talc in various proportions from 10% to 50%. These powder mixtures were spatulated with poly(acrylic acid) in three powder to liquid (P/L) ratios of 1:1, 1‐5:1 and 2:1 (w/w).
R K, Bansal, U S, Tewari, P, Singh, D V, Murthy   +3 more
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Bond strength of polycarboxylic acid cements to treated dentine

Dental Materials, 1985
Abstract The effect of some dentine surface pretreatments proposed in the literature to enhance the bond strengths of one or more polycarboxylic acid cements, has been examined. Few of these pretreatments have been independently investigated. The bond strengths of two polycarboxylic acid cements, one of which contained SnF2, and a glass-ionomer ...
D R, Beech, A, Solomon, R, Bernier
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The nature of the zinc polycarboxylate cement matrix

Journal of Biomedical Materials Research, 1982
AbstractThe matrix of a stoichiometric zinc polycarboxylate cement has been shown to be identical with zinc polycarboxylate salt, which consists principally of neutralized carboxylate groups with a few free acid groups. When excess zinc oxide is present, as in practical cements, there are no free acid groups present.
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