Three-month water degradation of resin-dentin interfaces subjected to direct and indirect exposure

Gabriel Abuna; Klissia Felizardo; Atais Bacchi; Lourenço Correr-sobrinho; Mario Sinhoreti; Americo Correr; Victor Feitosa

doi:10.7126/cdj.58140.1008002161

EN

Three-month water degradation of resin-dentin interfaces subjected to direct and indirect exposure

Abstract

Objectives: The aim of this study was to assess the effects direct or indirect water exposure on the 3 months hydrolytic degradation of three dentin bonding agents.

Materials and methods: The samples were divided in three groups: Clearfil SE Bond, Clearfil S3, Adper Singlebond 2; and the samples were restored with Filtek Z350. Subsequent to the restorative procedures, the specimens of each group were divided into three subgroups (immersed in water deionised): Control (24h-37ºC), Direct Water exposure DWE for 3 months (37º), Indirect water exposure (IWE-3m) with enamel margins for 3 months (37ºC). After the storage the samples were sectioned into sticks and µTBS testing (EZ test) and Scanning Electronic Microscopy assessed the failure mode. The µTBS data were statistically analysed using two-way ANOVA and Tukey’s test at α=0.05%. The samples were processed for nanoleakage evaluation immersed in 50 wt% ammoniacal silver nitrate (24 h), rinsed and immersed in a photo-developing solution for 8 h.

Results: After 3 months CSE was the least affected by water degradation regardless the aging strategy. IWE afforded very little variation on µTBS after 3 m. Intense nanoleakage was observed with DWE groups with increases incidence of mixed failures instead

Conclusion: Bonded dentin margins are more prone to hydrolytic degradation than resin-enamel interfaces. The increased nanoleakage and the drop of bond strength showed this.

Keywords

Hydrolytic degradation, bonding, Scanning electron microscopy, dentin, enamel

References

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Details

Primary Language

English

Subjects

-

Journal Section

-

Authors

Gabriel Abuna

Klissia Felizardo

Atais Bacchi

Lourenço Correr-sobrinho

Mario Sinhoreti

Americo Correr

Victor Feitosa

Publication Date

January 24, 2014

Submission Date

May 10, 2013

Acceptance Date

-

Published in Issue

Year 1970 Volume: 17 Number: 1

DOI

https://doi.org/10.7126/cdj.58140.1008002161

IZ

https://izlik.org/JA26KS99DS

Cite

RIS / Bibtex

EndNote

Abuna G, Felizardo K, Bacchi A, Correr-sobrinho L, Sinhoreti M, Correr A, Feitosa V (January 1, 2014) Three-month water degradation of resin-dentin interfaces subjected to direct and indirect exposure. Cumhuriyet Dental Journal 17 1 55–63.

Three-month water degradation of resin-dentin interfaces subjected to direct and indirect exposure

Abstract

Keywords

Öz

References

Details

Primary Language

Subjects

Journal Section

Authors

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

Cite