A morphological and tensile bond strength evaluation of an unfilled adhesive with low-viscosity composites and a filled adhesive in one and two coats

dc.creatorMontes, AMJR
dc.creatorde Goes, MF
dc.creatorda Cunha, MRB
dc.creatorSoares, AB
dc.date2001
dc.dateAUG
dc.date2014-11-13T11:22:36Z
dc.date2015-11-26T18:07:12Z
dc.date2014-11-13T11:22:36Z
dc.date2015-11-26T18:07:12Z
dc.date.accessioned2018-03-29T00:49:20Z
dc.date.available2018-03-29T00:49:20Z
dc.identifierJournal Of Dentistry. Elsevier Sci Ltd, v. 29, n. 6, n. 435, n. 441, 2001.
dc.identifier0300-5712
dc.identifierWOS:000171170800008
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76100
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/76100
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76100
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1293531
dc.descriptionObjective: The purpose of this study was to measure the tensile bond strength (TBS) testing of resin composite to dentin of three low-viscosity composites, in association with an unfilled adhesive, and a filled adhesive one and two coats respectively, and to evaluate and compare the SEM morphological observations. Methods:The labial surface of 120 bovine lower incisors were ground to obtain a flat dentin surface allowing demarcation of a 4 mm diameter area with adhesive tape. The teeth were randomly divided in six groups of 20 each. The dentin of each ground surface was etched with 35% H3PO4 for 15 s, followed by application of the respective adhesive: Single Bond (SB) for Groups 1, 2, 3 and 6; Optibond Solo (OS) for Groups 4 and 5. In Groups 1 and 4, a resin composite rod with a wire loop was luted directly to the adhesive surface with Z100. Group 2 received an intermediate layer of Flow It (FI) composite; Group 3 received an intermediate layer of Protect Liner F (PLF) composite; Group 5 received a second coat of OS; and Group 6 received an intermediate layer of an experimental low-viscosity composite (EM). A resin composite rod was luted to the surface of each specimen with Z100 resin composite. All specimens were stored in distilled water at 37 degreesC for 24 h prior to TBS testing. Each specimen was inspected by SEM and classified according to adhesive or cohesive failure mode. One specimen of each group was cut longitudinally, polished and prepared for SEM observation. Results: The TBS values were: Group 1 (7.86 MPa +/- 2.28), Group 2 (7.62 MPa +/- 1.85), Group 3 (7.60 MPa +/- 2.14), Group 4 (7.96 MPa +/- 2.36), Group 5 (7.50 MPa +/- 2.70) and Group 6 (7.18 MPa +/- 2.40). No significant statistical differences were observed among the groups. However, the analyses of the failure mode presented a considerable variation. Significance:The use of a filled adhesive or an unfilled adhesive along with a low-viscosity composite as an intermediate layer may provide a stress absorbing layer, whereby improving the preservation of the bonded interface area. (C) 2001 Elsevier Science Ltd. All rights reserved.
dc.description29
dc.description6
dc.description435
dc.description441
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationJournal Of Dentistry
dc.relationJ. Dent.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectlow-viscosity composite
dc.subjectfilled adhesive
dc.subjectpolymerisation shrinkage
dc.subjecthybrid layer
dc.subjectelastic modulus
dc.subjectelastic cavity wall
dc.subjectFlowable Composites
dc.subjectDentin
dc.subjectShear
dc.subjectSystems
dc.subjectResin
dc.subjectRelaxation
dc.subjectElasticity
dc.subjectStress
dc.titleA morphological and tensile bond strength evaluation of an unfilled adhesive with low-viscosity composites and a filled adhesive in one and two coats
dc.typeArtículos de revistas


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