Effect of Resin Cement Porosity on Retention of Glass-Fiber Posts to Root Dentin: An Experimental and Finite Element Analysis
| Autor: | Priscilla Barbosa Ferreira Soares, Carlos José Soares, Grazielle Crystine Rodrigues Aguiar, A.A. Bicalho, Monise de Paula Rodrigues, Crisnicaw Veríssimo, Natércia Rezende da Silva |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Bond strength fiber post push-out bond testing Root canal Finite Element Analysis Glass fiber confocal laser microscopy micro-CT Resin Cements Stress (mechanics) medicine.anatomical_structure Dentin resin cement medicine Glass Fiber Adhesive Tooth Root Composite material Porosity General Dentistry Post and Core Technique Stress concentration |
| Zdroj: | Brazilian Dental Journal v.26 n.6 2015 Brazilian Dental Journal Fundação Odontológica de Ribeirão Preto (FUNORP) instacron:FUNORP Brazilian Dental Journal, Volume: 26, Issue: 6, Pages: 630-636, Published: DEC 2015 |
| ISSN: | 0103-6440 |
| Popis: | The aim of this study was to evaluate the effect of porosity of self-adhesive resin on the stress distribution, post retention and failure mode of fiber post cemented to human root dentin. Ten human central upper incisors with circular root canal were selected. They were sectioned with 15 mm and were endodontically filled. The roots were scanned using micro-CT after post space preparation for root filling remaining evaluation. Fiber posts were cemented using self-adhesive resin cement (Rely X U200, 3M-ESPE). Two 1-mm-thick slices from the cervical, medium and apical thirds were scanned for resin cement bubbles volume measurements and submitted to a push-out test (PBS). Three operators using stereomicroscopy and confocal laser microscopy classified the failure mode. Stress distributions during the push-out test were analyzed using 3D finite element analysis. PBS values (MPa) were submitted to one-way ANOVA and Tukey's post hoc tests and the failure modes using the Kappa coefficient to assess inter-operator agreement. Chi-square test was used to determine significant differences between the methods ( = 0.05). Push-out bond strength was significantly affected by the bubbles presence in all root depth (p |
| Databáze: | OpenAIRE |
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