da Rocha, Sicknan SoaresNogueira, Fabiane [UNESP]Pieralini, Anelise Rodolfo Ferreira [UNESP]Ribeiro, Ricardo FariaAdabo, Gelson Luis [UNESP]2014-05-272014-05-272010-04-01Brazilian Oral Research, v. 24, n. 2, p. 147-152, 2010.1806-83241807-3107http://hdl.handle.net/11449/71624This study analyzed the reaction layer and measured the marginal crown fit of cast titanium applied to different phosphate-bonded investments, prepared under the following conditions (liquid concentration/casting temperature): Rema Exakt (RE) - 100%/237°C, 75%/287°C, Castorit Super C (CS)-100%/70°C, 75%/141°C and Rematitan Plus (RP)-100%/430°C (special to titanium cast, as the control group). The reaction layer was studied using the Vickers hardness test, and analyzed by two way ANOVA and Tukey's HSD tests (α = 0.05). Digital photographs were taken of the crowns seated on the die, the misfit was measured using an image analysis system and One-way ANOVA, and Tukey's test was applied (α = 0.05). The hardness decreased from the surface (601.17 VHN) to 150 μm (204.03 VHN). The group CS 75%/141°C presented higher hardness than the other groups, revealing higher surface contamination, but there were no differences among the groups at measurements deeper than 150 μm. The castings made with CS - 100%/70°C presented the lowest levels of marginal misfit, followed by RE -100%/237°C. The conventional investments CS (100%) and RE (100%) showed better marginal fit than RP, but the CS (75%) had higher surface contamination.147-152engDental alloysDental casting investmentDental casting techniqueDental prosthesisTitaniumbiomedical and dental materialsphosphatetitaniumanalysis of variancechemistrydentureendodonticshardnessheatmaterials testingsurface propertytooth crownAnalysis of VarianceCrownsDental Casting InvestmentDental Casting TechniqueDental Marginal AdaptationDental MaterialsHardness TestsHot TemperatureMaterials TestingPhosphatesSurface PropertiesArtigo10.1590/S1806-83242010000200004S1806-83242010000200004Acesso aberto2-s2.0-779555474482-s2.0-77955547448.pdf2851339311179809