Goiato, Marcelo Coelho [UNESP]Zucolotti, Bruna Carolina RossattiSantos, Daniela Micheline dos [UNESP]Moreno, AmáliaRezende, Maria Cristina Rosifini Alves [UNESP]2014-05-272014-05-272009-12-01Acta odontológica latinoamericana : AOL, v. 22, n. 3, p. 227-232, 2009.0326-4815http://hdl.handle.net/11449/71419Soft linings are materials used to reduce the tension and forces of mastication, forming all or part of the fitting surface of a denture. This study evaluated the effect of thermocycling on water absorption, solubility, Shore A hardness and color stability of permanent soft liner materials. MATERIAL AND METHODS: Two chemically activated soft liner materials (Sofreliner S; GC Reline Ultrasoft) were tested. Twenty cylindrical specimens (30.0 x 1.0 mm) were prepared for measuring water absorption and solubility and another twenty (30.0 x 3 mm) for analyzing Shore A hardness and color stability. Color was measured by a spectrophotometer before and after 2000 thermocycles. A one-way ANOVA test and Tukey test at a 5% confidence level (p<0.05) were performed. RESULTS: The results did not show statistical differences for water absorption, solubility or color stability. The post-thermocycling Shore A hardness values were significantly higher than those before the treatment. CONCLUSION: Thermocycling of soft liner materials increased Shore A hardness.227-232engdenturematerials testingmechanicstemperatureDenture LinersMaterials TestingMechanicsTemperatureArtigoAcesso aberto2-s2.0-7795303949297198838148725820000-0002-1327-96670000-0002-3800-3050