Niobium oxyhydroxide as a bioactive agent and reinforcement to a high-viscosity bulk-fill resin composite

The present in vitro study incorporated niobium oxyhydroxide fillers into an experimental high-viscosity bulk-fill resin composite to improve its mechanical performance and provide it a bioactive potential. Scanning electron microscopy synthesized and characterized 0.5% niobium oxyhydroxide fillers,...

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Bibliographic Details
Published in:Journal of applied oral science 2024, Vol.32, p.e20230278-e20230278
Main Authors: Obeid, Alyssa Teixeira, Nascimento, Tatiana Rita de Lima, Agassi, Ana Carolina, Almeida, Ana Zélia Falcão, Guedes, Ana Paula de Melo Alves, Alves, João Marco, Bombonatti, Juliana Fraga Soares, Velo, Marilia Mattar de Amoêdo Campos
Format: Article
Language:English
Subjects:
Composite Resins
Dental caries
Dental Materials
DENTISTRY, ORAL SURGERY & MEDICINE
Materials Testing
Nanoparticles
Nanotechnology
Niobium
Original
Polymerization
Viscosity
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Summary:The present in vitro study incorporated niobium oxyhydroxide fillers into an experimental high-viscosity bulk-fill resin composite to improve its mechanical performance and provide it a bioactive potential. Scanning electron microscopy synthesized and characterized 0.5% niobium oxyhydroxide fillers, demonstrating a homogeneous morphology that represented a reinforcement for the feature. Fillers were weighed, gradually added to the experimental resin composite, and homogenized for one minute, forming three groups: BF (experimental high-viscosity bulk-fill resin composite; control), BF0.5 (experimental high-viscosity bulk-fill resin composite modified with 0.5% niobium oxyhydroxide fillers), and BFC (commercial bulk-fill resin composite Beautifil Bulk U, Shofu; positive control). In total, 10 specimens/groups (8 × 2 × 2 mm) underwent flexural strength (FS) tests in a universal testing machine (Instron) (500N). Resin composites were also assessed for Knoop hardness (KH), depth of cure (DoC), degree of conversion (DC), elastic modulus (E), and degree of color change (ΔE). The bioactive potential of the developed resin composite was evaluated after immersing the specimens into a simulated body fluid in vitro solution and assessing them using a Fourier-transformed infrared spectroscope with an attenuated total reflectance accessory. One-way ANOVA, followed by the Tukey's test (p
ISSN:1678-7757
1678-7765
1678-7765
DOI:10.1590/1678-7757-2023-0278