Mechanical properties of bulk-fill versus nanohybrid composites: Effect of layer thickness and application protocols

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dc.contributor.authorÇilingir, Aylin
dc.contributor.authorÖzsoy, Alev
dc.contributor.authorMert-Eren, Meltem
dc.contributor.authorBehram, Özge
dc.contributor.authorDikmen, Benin
dc.contributor.authorÖzcan, Mutlu
dc.date.accessioned2021-05-15T12:50:02Z
dc.date.available2021-05-15T12:50:02Z
dc.date.issued2019
dc.departmentDiş Hekimliği Fakültesi, Restoratif Diş Hekimliği Anabilim Dalıen_US
dc.description.abstractObjective: The objective of this study was to evaluate the compressive strength, flexural strength and flexural modulus of high-viscosity, low-viscosity bulk-fill, and conventional nano-hybrid resin composite materials alone and when covered with nano-hybrid resin composite at different incremental thicknesses on the bulk-fill composites. Material and Methods: Specimens (N=60) were fabricated from the following materials or their combinations (n=10 per group): a) conventional nano-hybrid composite Z550 (FK), b) high-viscosity bulk-fill composite (Tetric N Ceram-TBF), c) low-viscosity bulk-fill composite SDR (SDR), d) Sonicfill (SF), e) SDR (2 mm)+FK (2 mm), f) SDR (4 mm)+FK (4 mm). After 24 h water storage, compressive strength was measured in a universal testing machine (1 mm/min). Additional specimens (N=40) (25x2x2 mm3) were made from FK, TBF, SDR and SF in order to determine the flexural strength and the flexural modulus, (n=10) and subjected to three-point bending test (0.5 mm/min). Data were analyzed using one-way ANOVA and Tamhane’s T2 post-hoc tests (p<0.05). Results: The mean compressive strength (MPa) of the nano-hybrid composite (FK) was significantly higher (223.8±41.3) than those of the other groups (123±27-170±24) (p<0.001). SDR (4 mm)+FK (2 mm) showed significantly higher compressive strength than when covered with 4 mm (143±30) or when used alone (146±11) (p<0.05). The mean flexural strength (159±31) and the flexural modulus of FK (34±7) was significantly higher than that of the high-or low-viscosity bulk-fill composites (p<0.001). The mean flexural strength of SF (132±20) was significantly higher compared to TBF (95±25) (p<0.05). Conclusion: Bulk-fill resin composites demonstrated poorer mechanical properties compared to nano-hybrid composite but similar to that of SF. Increasing the thickness of low-viscosity bulk-fill composite (SDR) from 2 to 4 mm underneath the nano-hybrid composite (FK) can improve the mechanical properties of the bulk-fill composites. © 2019, Universidade Estadual Paulista, Institute of Science and Technology of Sao Jose dos Campos. All rights reserved.en_US
dc.identifier.doi10.14295/bds.2019.v22i2.1719
dc.identifier.endpage242en_US
dc.identifier.issn2178-6011
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85067416535
dc.identifier.scopusqualityQ3
dc.identifier.startpage234en_US
dc.identifier.urihttps://doi.org/10.14295/bds.2019.v22i2.1719
dc.identifier.urihttps://hdl.handle.net/20.500.12939/1169
dc.identifier.volume22en_US
dc.indekslendigikaynakScopus
dc.institutionauthorMert-Eren, Meltem
dc.language.isoen
dc.publisherUniversidade Estadual Paulista, Institute of Science and Technology of Sao Jose dos Camposen_US
dc.relation.ispartofBrazilian Dental Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBulk-Fill Compositesen_US
dc.subjectCompressive Strengthen_US
dc.subjectFlexural Modulusen_US
dc.subjectFlexural Strengthen_US
dc.subjectMechanical Propertiesen_US
dc.titleMechanical properties of bulk-fill versus nanohybrid composites: Effect of layer thickness and application protocols
dc.title.alternative[Propriedades mecânicas de compósitos de resina bulk versus nano-híbrida: Efeito da espessura da camada e protocolos de aplicação]
dc.typeArticle

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