Evaluation of the physical and mechanical properties of flexible resins under the influence of thermocycling
MetadataShow full item record
Introduction: New materials are developed all the time to better suit the patients' needs, such as flexible injectable thermoplastic resins that provide more esthetics to patients using removable partial dentures. Aim: The objective of this study was to evaluate the color change, microhardness and flexural strength of an experimental flexible acrylic resin under the influence of thermocycling. Materials and Methods: This in vitro study was conducted in Aracatuba Dental School, UNESP University. Two types of samples were made, 30 in circular format (3×10 mm) for color and microhardness tests, and 60 in rectangular format (64×10×3.3 mm) for the flexural strength test. The samples were divided into three groups (n=10), one of the experimental flexible resin tested, one with a flexible resin already marketed (Sorriflex), and a control group of a conventional thermopolymerisable acrylic resin (Lucitone). After the preparation, color, microhardness and flexural strength readings were taken, initially and after 2000 thermocycling cycles. The obtained data was submitted to analysis of variance ANOVA and post-hoc Tukey’s test when necessary. Results: All resins presented a clinically acceptable color variation (ΔE), with no significant difference between resin type (p>0.05). There was a difference in the hardness of resins in ascending order (Sorriflex, experimental and Lucitone) and the hardness increased after thermocycling (p<0.05). For the flexural strength, the only difference was related to the type of resin, the acrylic resin presented higher value with respect to the thermoplastic resins. Conclusion: We conclude that the tested experimental resin has properties similar to those found in the market, presenting the advantage of greater surface hardness.
How to cite this document
Showing items related by title, author, creator and subject.
Pinho, Sheila Zambello de ; Oliveira, José Brás Barreto de ; Gazola, Rodrigo José Cristiano ; Mazotti, Adriano César ; Molero, Camila Schimite ; Mendes, Carolina Borghi ; Mello, Denise Fernandes de ; Marques, Emilia de Mendonça Rosa ; Talamoni, Jandira Liria Biscalquini ; Silva, José Humberto Dias da et al. (Coleção PROGRAD (UNESP), 2011) [Livro]
Pinho, Sheila Zambello de ; Oliveira, José Brás Barreto de ; Pontes, Sueli Rodrigues ; Almeida, Djanira Soares de Oliveira e ; Godoy, Kathya Maria Ayres de ; Rosa, Claudia de Souza ; Nunes, Julianus Araújo ; Salvador, Sérgio Azevedo ; David, Célia Maria ; Vilche Peña, Angel Fidel et al. (Coleção PROGRAD (UNESP), 2011) [Livro]
Pinho, Sheila Zambello de ; Spazziani, Maria de Lourdes ; Mendonça, Sueli Guadelupe de Lima ; Rubo, Elisabete Aparecida Andrello ; Villarreal, Dalva Maria de Oliveira ; Duarte, Camila ; Okamoto, Mary Yoko ; Souza, Thais R. ; Garms, Gilza Maria Zauhy ; Marin, Fátima Aparecida Dias Gomes et al. (Coleção PROGRAD (UNESP), 2012) [Livro]