Magnitude and distribution of stresses in composite resin and sound dentine interface with mechanical retentions
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Magnitude and distribution of stresses in composite resin and sound dentine interface with mechanical retentions

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Magnitude and distribution of stresses in composite resin and sound dentine interface with mechanical retentions

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dc.contributor.author Kuramochi, Gisaku es
dc.contributor.author Borie, Eduardo es
dc.contributor.author Orsi, Iara Augusta es
dc.contributor.author Del Sol, Mariano es
dc.date.accessioned 2015-06-29T11:46:24Z
dc.date.available 2015-06-29T11:46:24Z
dc.date.issued 2015 es
dc.identifier.uri http://hdl.handle.net/10550/44840
dc.source Kuramochi, Gisaku ; Borie, Eduardo ; Orsi, Iara Augusta ; Del Sol, Mariano. Magnitude and distribution of stresses in composite resin and sound dentine interface with mechanical retentions. En: Journal of Clinical and Experimental Dentistry, 2015, Vol. 7, No. 2: 232-236 es
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title Magnitude and distribution of stresses in composite resin and sound dentine interface with mechanical retentions es
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.description.abstractenglish Background: Adhesive systems are constantly subjected to mechanical and chemical stresses that negatively impact the integrity and durability of the dentine-adhesive interface. Despite the lack of evidence to support or reject the clinical indication for mechanical retention, the potential further contribution of these preparations to the behavior of the composite resin-sound dentine bond has been rarely addressed. The authors evaluated by finite element analysis the effect of mechanical retention on the magnitude and distribution of stresses in a composite resin-sound dentin bonding interface when subjected to tensile and shear forces. Material and Methods: A three-dimensional model was created based on three cylindrical volumes representing the sound dentin, adhesive system, and composite resin. From this main model, two models were designed to simulate dentine bonding: 1) a model with no mechanical retention, which considered flat adhesion; and 2) a model with retention, which considered four hemispherical holes on the dentine surface. Both groups were subjected to linear static analysis under tensile and shear loading of 200N. Results: At the model with retentions’ bonding interface under tensile and shear loading, a concentration of Von Mises equivalent stress was observed within the retentions, with a reduction of those stresses on the bonding boundary surface. Conclusions: Additional mechanical retention increases the tensile strength of the sound dentin-composite resin bonding interface, promoting a decrease in the magnitude of the stresses and their redistribution under tensile and shear loading es

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