Effect of long-term storage on nanomechanical and morphological properties of dentin-adhesive interfaces

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorAnchieta, Rodolfo Bruniera
dc.creatorMachado, Lucas Silveira
dc.creatorMartini, Ana Paula
dc.creatorSantos, Paulo Henrique dos
dc.creatorGiannini, Marcelo
dc.creatorJanal, Malvin
dc.creatorTovar, Nick
dc.creatorSundfeld, Renato Herman
dc.creatorRocha, Eduardo Passos
dc.creatorCoelho, Paulo G.
dc.date2015-10-21T13:10:24Z
dc.date2016-10-25T20:59:45Z
dc.date2015-10-21T13:10:24Z
dc.date2016-10-25T20:59:45Z
dc.date2015-02-01
dc.date.accessioned2017-04-06T08:58:50Z
dc.date.available2017-04-06T08:58:50Z
dc.identifierDental Materials. Oxford: Elsevier Sci Ltd, v. 31, n. 2, p. 141-153, 2015.
dc.identifier0109-5641
dc.identifierhttp://hdl.handle.net/11449/128500
dc.identifierhttp://acervodigital.unesp.br/handle/11449/128500
dc.identifierhttp://dx.doi.org/10.1016/j.dental.2014.11.010
dc.identifierWOS:000349759400014
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0109564114006642
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/939056
dc.descriptionIntroduction. To evaluate the influence of storage time on the elastic modulus, micromorphology, nanoleakage, and micromechanical behavior of the dentin-adhesive interfaces of five adhesive systems (Scotchbond Multi-Purpose, Clearfil SE Bond, One Up Bond F, Adper Easy One, and Filtek LS Adhesive) after 24 h (T0) and 12 months (T1).Methods. Fifty teeth were restored and distributed according to each adhesive system (n = 10). At least four specimens were obtained from each tooth. One specimen was evaluated under SEM to obtain the micromorphology of dentin-adhesive interface (DAI). Two specimens were used to assess nanoleakage, one tested in T0 and the other in T1. The last specimen was used for nanoindentation, in T0 and T1, to obtain the initial and final mechanical properties of DAI structures. Two non-restored teeth were evaluated under SEM to obtain the dentin morphology. Laboratorial data were used to build 15 finite element models to assess the maximum principal stress in each time of analysis.Results. Storage resulted in hydrolysis of the dentin-adhesive interfaces for all groups. Silver impregnation increased for all groups after 1 year storage (p < .05), except for Clearfil SE Bond. In general, a decrease in elastic modulus values was observed for all groups from T0 to T1 (p < .05), mainly at the hybrid layer. The FEAs showed higher stress levels at T1 than T0 simulations for all adhesives.Conclusion. At T1, degradation occurred at the dentin-adhesive interface formed by all adhesives, and the intensity of degradation differed depending on the type of adhesive system used. The interface formed by the self-etching primer containing the 10-MDP functional monomer showed the highest stability among the adhesive systems after 12 months of storage. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherElsevier B.V.
dc.relationDental Materials
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDentin
dc.subjectHybrid layer
dc.subjectHydrolytic degradation
dc.subjectMechanical properties
dc.subjectDentin-adhesive interface
dc.titleEffect of long-term storage on nanomechanical and morphological properties of dentin-adhesive interfaces
dc.typeOtro


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