Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/347810
Type: Artigo
Title: Influence of artificial accelerated aging on dimensional stability of acrylic resins submitted to different storage protocols
Author: Garcia, Lucas da Fonseca Roberti
Roselino, Lourenço de Moraes Rego
Mundim, Fabrício Mariano
Pires-de-Souza, Fernanda de Carvalho Panzeri
Consani, Simonides
Abstract: The aim of this study was to evaluate the influence of artificial accelerated aging on dimensional stability of two types of acrylic resins (thermally and chemically activated) submitted to different protocols of storage. Materials and Methods: One hundred specimens were made using a Teflon matrix (1.5 cm × 0.5 mm) with four imprint marks, following the lost‐wax casting method. The specimens were divided into ten groups, according to the type of acrylic resin, aging procedure, and storage protocol (30 days). GI: acrylic resins thermally activated, aging, storage in artificial saliva for 16 hours, distilled water for 8 hours; GII: thermal, aging, artificial saliva for 16 hours, dry for 8 hours; GIII: thermal, no aging, artificial saliva for 16 hours, distilled water for 8 hours, GIV: thermal, no aging, artificial saliva for 16 hours, dry for 8 hours; GV: acrylic resins chemically activated, aging, artificial saliva for 16 hours, distilled water for 8 hours; GVI: chemical, aging, artificial saliva for 16 hours, dry for 8 hours; GVII: chemical, no aging, artificial saliva for 16 hours, distilled water for 8 hours; GVIII: chemical, no aging, artificial saliva for 16 hours, dry for 8 hours GIX: thermal, dry for 24 hours; and GX: chemical, dry for 24 hours. All specimens were photographed before and after treatment, and the images were evaluated by software (UTHSCSA – Image Tool) that made distance measurements between the marks in the specimens (mm), calculating the dimensional stability. Data were submitted to statistical analysis (two‐way ANOVA, Tukey test, p= 0.05). Results: Statistical analysis showed that the specimens submitted to storage in water presented the largest distance between both axes (major and minor), statistically different (p < 0.05) from control groups. Conclusions: All acrylic resins presented dimensional changes, and the artificial accelerated aging and storage period influenced these alterations.
Subject: Resinas acrílicas dentárias
Country: Estados Unidos
Editor: Wiley
Rights: Fechado
Identifier DOI: 10.1111/j.1532-849X.2010.00611.x
Address: https://onlinelibrary.wiley.com/doi/full/10.1111/j.1532-849X.2010.00611.x
Date Issue: 2010
Appears in Collections:FOP - Artigos e Outros Documentos

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