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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Moist vs over-dried etched dentin: FE-SEM/TEM and bond strength evaluation of resin-dentin interfaces produced by universal adhesives

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Kumagai, Rose Y. [1] ; Hirata, Ronaldo [2] ; Pereira, Patricia N. R. [3] ; Reis, Andre F. [3]
Total Authors: 4
[1] Univ Guarulhos, Dept Operat Dent, Guarulhos - Brazil
[2] NYU, Coll Dent, Dept Biomat & Biomimet, New York, NY - USA
[3] Univ Florida, Div Operat Dent, Dept Restorat Dent Sci, Gainesville, FL - USA
Total Affiliations: 3
Document type: Journal article
Source: Journal of Esthetic and Restorative Dentistry; OCT 2019.
Web of Science Citations: 0

Objective To evaluate the influence of the degree of dentin moisture on interfacial ultramorphology and bond strength (mu TBS) of universal adhesives. Materials and Methods Futurabond U (FBU), Scotchbond Universal (SBU), Adhese Universal (ADU), and Prime\&Bond active (PBA) were used. After acid-etching, moist or over-dried dentin surfaces were tested. Teeth were restored for scanning and transmission electron microscopy (n = 3) and mu TBS evaluation (n = 5). mu TBS results were analyzed by two-way ANOVA and Tukey. Results For moist dentin, a well-formed hybrid layer (HL) was observed. However, when applied to over-dried dentin, remarkable differences were observed. Defects, gaps, and reduced HL thickness were observed mainly for ADU and FBU. When applied to wet dentin, mu TBS values were similar for all adhesives, except for FBU, which was significantly lower. When applied to over-dried dentin, PBA presented the highest mu TBS values, followed by SBU, ADU, and FBU. ADU presented significantly lower mu TBS when applied to over-dried dentin. Conclusion PBA, SBU, and FBU mu TBS values were not sensitive to the degree of moisture. Even though application to over-dried dentin revealed defects, gaps and reduced HL thickness for SBU, ADU, and FBU, mu TBS analysis only revealed a significant reduction for ADU. Clinical Significance Universal adhesives can be applied in either self-etching or etch-and-rinse mode. However, clinicians are not aware which universal adhesives should be strictly applied on a moist dentin for bonding in the etch-and-rinse mode. (AU)

FAPESP's process: 09/16261-2 - Effects of intrapulpal pressure on the long-term bond strength and nanoleakage of resin-dentin interfaces produced by self-adhesive cements: an in vitro study
Grantee:André Figueiredo Reis
Support type: Regular Research Grants
FAPESP's process: 07/06083-4 - Long-term evaluation of the bond strength, nanoleakage patterns and ultramorphological characteristics of resin-dentin interfaces produced by self-adhesive cements
Grantee:André Figueiredo Reis
Support type: Regular Research Grants
FAPESP's process: 14/23401-3 - Development of monomeric blends containing methacrylates with elastomeric behavior in association with photoinitiated alternative systems for application in dental materials
Grantee:André Figueiredo Reis
Support type: Regular Research Grants