EFFECT OF TEMPORARY CEMENTS ON THE BOND STRENGTH OF A RESIN CEMENT TO A PRE-HYBRIDIZED DENTIN
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Data
2017-01-01
Autores
Lima, Marcio Ferreira
Maciel, Carolina Menezes
Oliveira Correia, Ayla Macyelle de [UNESP]
Griza, Sandro
Melo de Mendonca, Adriano Augusto
Título da Revista
ISSN da Revista
Título de Volume
Editor
Univ Federal Uberlandia
Resumo
This study assessed the bond strength of a resin cement when Immediate Sealed Dentin (ISD) was contaminated by different temporary cements applying a microshear test. Forty-eight fragments of third molar crowns were mounted in acrylic resin and worn until the dentin was exposed. The substrates were sealed with a 3-step conventional adhesive system and divided into four groups (n= 12): Control (without temporary cement) and three groups that used different temporary cements - Provy, RelyX Temp NE, and Provitemp. The temporary cements were removed after 7 days of storage. Resin cement RelyX ARC was applied to the contaminated substrates. Microshear bond strength was evaluated using a universal testing machine (0.5 mm/min). Data was analyzed with ANOVA and a Dunnett post-hoc test (p < 0.05). Additionally, three samples from each group were prepared for scanning electron microscope analysis. Means and standard deviations of microshear bond strength (MPa) were 17.96 +/- 1.65, 16.70 +/- 1.43, 20.43 +/- 1.30 and 33.75 +/- 4.72 for Control, Provy, RelyX Temp, and Provitemp, respectively. Statistically significant difference was observed between the Control and Provitemp samples (p=0.0002). Adhesive failures were dominant (50%), followed by cohesive failures with cement (26%), and cohesive failures with dentin (24%). Residues of Provy and Provitemp were observed on the sealed dentin. Provitemp temporary cement sealing increased the microshear bond strength of the resin cement on dentin treated with IDS.
Descrição
Palavras-chave
Dental materials, Resin cements, Bond strength, Immediate dentin sealing
Como citar
Bioscience Journal. Uberlandia: Univ Federal Uberlandia, v. 33, n. 1, p. 247-256, 2017.