Evaluation of Physical-Mechanical properties of different Bulk-Fill composites / Avaliação das propriedades Físico-Mecânicas de diferentes compósitos Bulk-Fill

Nara Sousa Rodrigues, Diana Araujo Cunha, Nayara de Oliveira Souza, Bárbara Lima Tomaz, Ezequias Costa Rodrigues Júnior, Lidiane Costa de Souza, Suyane Maria Luna -Cruz, Juliano Sartori Mendonça, Vicente de Paulo Aragão Saboia


The aim of the study was to assess the degree of conversion (DC), microhardness, polymerization shrinkage stress (PSS) and volumetric contraction of two bulk-fill composites (SonicFill, Kerr Corporation, Orange, CA, USA - (SF) and Filtek BulkFill, 3M ESPE, St Paul, MN, USA - (FB)) and one conventional nanofiller resin composite (Z350XT – 3M ESPE, St Paul, MN, USA) inserted incrementally (Z350I) or in bulk (Z350B). Micro-Raman spectroscopy, Knoop microhardness, PSS test and micro-computed tomography technique (μCT) were used to evaluate the resin composites. Data were analyzed with one-way ANOVA followed by Tukey’s post hoc test (α = 0.05). DC was not affected by the type of the composite, excepted when conventional resin composite was inserted in a single increment (p = 0.002). FB and Z350I showed higher microhardness values than Z350B (p = 0,003), while SF showed no statistically significant difference to the other resin composites. No statistical differences were found among the composites regarding to PSS (p = 0.104) and volumetric shrinkage (p = 0.258). Therefore, it can be concluded that bulk-fill and conventional resin composites tested present similar properties. Thus, shorter time required for the use associated with simplified operative technique are considered clinical advantages of bulk-fill composites.


Resin composite, Bulk-fill technique, Degree of Conversion, Polymerization shrinkage, micro-computed tomography.


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DOI: https://doi.org/10.34119/bjhrv4n2-377


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