Biomechanical behavior of cavity configuration on micropush-out test : a finite-element-study
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Biomechanical behavior of cavity configuration on micropush-out test : a finite-element-study

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Biomechanical behavior of cavity configuration on micropush-out test : a finite-element-study

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dc.contributor.author Cekic Nagas, Isil es
dc.contributor.author Shinya, Akikazu es
dc.contributor.author Ergün, Gülfem es
dc.contributor.author Vallittu, Pekka K. es
dc.contributor.author Lassila, Lippo V.J. es
dc.date.accessioned 2017-07-27T06:49:11Z
dc.date.available 2017-07-27T06:49:11Z
dc.date.issued 2011 es
dc.identifier.uri http://hdl.handle.net/10550/60211
dc.description.abstract Objective: The objective of this study was to simulate the micropush-out bond strength test from a biomechanical point of view. For this purpose, stress analysis using finite element (FE) method was performed. Study design: Three different occlusal cavity shapes were simulated in disc specimens (model A: 1.5 mm cervical, 2 mm occlusal diameter; model B: 1.5 mm cervical, 1.75 mm occlusal diameter; model C: 1.5 mm cervical, 1.5 mm occlusal diameter). Quarter sizes of 3D FE specimen models of 4.0×4.0×1.25 mm3 were constructed. In order to avoid quantitative differences in the stress value in the models, models were derived from a single mapping mesh pattern that generated 47.182 elements and 66.853 nodes. The materials that were used were resin composite (Filtek Z250, 3M ESPE), bonding agent (Adper Scotchbond Multi-Purpose, 3M ESPE) and dentin as an isotropic material. Loading conditions consisted of subjecting a press of 4 MPa to the top of the resin composite discs. The postprocessing files allowed the calculation of the maximum principal stress, minimum principal stress and displacement within the disc specimens and stresses at the bonding layer. FE model construction and analysis were performed on PC workstation (Precision Work Station 670, Dell Inc.) using FE analysis program (ANSYS 10 Sp, ANSYS Inc.). Results: Compressive stress concentrations were observed equally in the bottom interface edge of dentin. Tensile stresses were observed on the top area of dentin and at the half of lower side of composite under the loading point in all of the FE models. Conclusions: The FE model revealed differences in displacement and stress between different cavity shaped disc specimens. As the slope of the cavity was increased, the maximum displacement, compressive and tensile stresses also increased. es
dc.source Cekic Nagas, Isil ; Shinya, Akikazu ; Ergün, Gülfem ; Vallittu, Pekka K. ; Lassila, Lippo V.J.. Biomechanical behavior of cavity configuration on micropush-out test : a finite-element-study. En: Medicina oral, patología oral y cirugía bucal. Ed. inglesa, 16 1 2011: 25- es
dc.title Biomechanical behavior of cavity configuration on micropush-out test : a finite-element-study 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.identifier.doi 10.4317/medoral.16.e119 es

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