Background:The clinical success and durability of luting cements are determined by structural integrity and dimensional stability. Sorption and solubility resin luting cements in food-simulating solutions has not been studied sufficiently. Aims and Objectives:To compare the sorption, solubility, and flexural strength of resin luting cements in artificial saliva, ethanol:water (1:1) and distilled water at 37°C. Materials and Methods: Four commercially available resin cements were selected. Disk-and rectangular-shaped samples will be prepared according to ISO standard-4049. Out of 160 specimens, 120 disc-shaped specimens will be subjected to sorption and solubility analysis. 40 rectangular-shaped specimens will be subjected for flexural strength analysis. Results: The result of the study clearly depicted that highest water sorption was observed for GC Fuji Cem in distilled water and artificial saliva media. For Composite Ionomer highest sorption was observed in ethanol:water medium. Panavia F showed least sorption in all three media. GC Fuji Cem exhibited more solubility in artificial saliva and ethanol:water (1:1) media, Composite Ionomer showed more solubility in distilled water medium. Secure luting agent showed least solubility in all three media. Highest flexural strength was observed by Panavia F and least by Tokeyoma Ionomer. Conclusion: Within the limitation of this study resin luting (Panavia F and Secure) agents showed least sorption, solubility, and highest flexural strength than compared to resin reinforced glass ionomer cement (GC Fuji Cem and Tokeyoma Ionomer).

Background: Posterior palatal seal area which the most posterior limitation of maxillary denture base has a greater contribution for retention in maxillary complete denture. The material aspect that is the heat cure denture base materials used for fabrication of final prosthesis is also equally important for clinical success. These materials may show variation in their properties such as strength and dimensional stability. These dimensional changes occurred are may be due to the combined result of both polymerization shrinkage and stresses released during flask cooling and it further may alter the pattern of dimensional acrylic resin behavior. Aims and Objectives: The aims and objectives of the study was to evaluate and compare the dimensional accuracy of various heat polymerizing materials on the posterior palatal seal area. Materials and Methods: Four commercially available heat cure denture processing materials, namely, Lucitone (Dentsply), Dental products India (DPI), Viracryl, Trevalon (Dentsply) were used as testing materials. An ideal edentulous Class I maxillary stone mold is taken as master die. A total of 20 samples were taken and were divided into four groups of five each. The dimensional changes were assessed at five different points marked at the posterior palatal seal area using a digital caliper with an accuracy of 0.01 mm. Results: Statistical analysis was performed by IBM SPSS version 21 using Kruskal-Wallis test, and the statistical significance was defined at P < 0.01. The mean marginal increase was 2.61 mm for DPI, 1.64 mm for Lucitone, 1.94 mm for Viracryl, and 1.34 mm for Trevalon. Conclusion: Within the limitations of this study, it was concluded that the dimensional accuracy of dentures is influenced by the type of heat cured materials used. In this study, Trevalon exhibited minimal discrepancy while DPI showed the highest discrepancy among the groups with statistically significant difference between the materials.