Abstract
The purpose of this study was to compare the physical of properties three low exothermic type self-curing hard denture relining materials (TR, CT, KL) with those of a conventional type (RR). Surface roughness, color difference, knoop hardness, water sorption, detail reproducibility, internal porosity, fluidity, temperature change during polymerization, transverse strength and adhesive strength for denture base resin was investigated.TR, CT and KL showed greater fluidity than RR. Fluidity of TR and RR was influenced by environmental temperature.Maximum temperature was proportionate to the thickness of specimens. TR, CT and KL showed a low maximum temperature during polymerization at 37°C more than RR. There were no notable differences in the maximum temperature during polymerization at 22°C.The time to reach the maximum temperature during polymerization at 22°C, especially for KL and RR, was longer than that during polymerization at 37°C. The time to reach the maximum temperature was not proportionate to the thickness of specimens.TR and CT showed higher values than RR in transverse strength and adhesive strength as a denture base resin.
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