Effects of hybrid inorganic-organic nanofibers on the properties of enamel resin infiltrants – An in vitro study

Obeid, Alyssa Teixeira; Garcia, Luisa Helena Antunes; Nascimento, Tatiana Rita de Lima; Castellano, Lúcio Roberto Cançado; Bombonatti, Juliana Fraga Soares; Honório, Heitor Marques; Mondelli, Rafael Francisco Lia; Sauro, Salvatore; Velo, Marilia Mattar de Amoêdo Campos

doi:10.1016/j.jmbbm.2021.105067

Cited by 10 publications

(17 citation statements)

References 81 publications

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“…Figure 6 represents the spectra of samples for all tested materials: (a) BF (control), (b) BF0.5 (resin composite doped with 0.5% of niobium), and (c) BFC (commercial resin composite with Giomer technology) in all evaluated times (T0, T1, T14, and T21). FTIR analysis showed free phosphate (PO 4 - ) bands captured by the surface area of the resin composites in all groups at the peaks of ~560 within T1 (BF) and T21 (BF0.5 and BFC). After 1 h of immersion in the solution, P-O bands suggested a rapid deposition of calcium phosphate at the surface area of the samples (Figure 6a, arrow).…”

Section: Resultsmentioning

confidence: 99%

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

OBEID,

NASCIMENTO,

AGASSI

et al. 2024

J. Appl. Oral Sci.

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Objective 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. Methodology 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<0.05), determined FS, DC, KH, and ΔE. For DoC, ANOVA was performed, which demonstrated no significant difference between groups (p<0.05). Conclusions The high-viscosity bulk-fill resin composite with 0.5% niobium oxyhydroxide fillers showed promising outcomes as reinforcement agents and performed well for bioactive potential, although less predictable than the commercial resin composite with Giomer technology.

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Section: Resultsmentioning

confidence: 99%

“…However, the primary challenge has involved developing materials with adequate remineralization by releasing therapeutic ions or anticaries agents with satisfactory mechanical properties. 4 …”

Section: Introductionmentioning

confidence: 99%

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

OBEID,

NASCIMENTO,

AGASSI

et al. 2024

J. Appl. Oral Sci.

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“…The use of CaP as fillers in RI was the subject of investigations conducted by Sfalcin et al [ 128 ], Dai et al [ 129 ] and Obeid et al [ 130 ]. Sfalcin [ 128 ] and Dai [ 129 ] incorporated the amorphous CaP particles into their respective experimental RI monomer by the weight ratio of 10% and between 10 to 30%, respectively, while Obeid et al [ 130 ] used nanofibers of polylactic acid (PLA) filled with CaP incorporated into silica network (PLA-SiO 2 -CaP) as their filler material. The addition of CaP increased the surface hardness and the DC value of the RI, and positive calcium and phosphate ion release were observed under pH-cycling challenge for PLA-SiO 2 -CaP and RI-30% CaP, respectively [ 129 , 130 ].…”

Section: Future: Innovation To Improve the Current Rimentioning

confidence: 99%

“…Sfalcin [ 128 ] and Dai [ 129 ] incorporated the amorphous CaP particles into their respective experimental RI monomer by the weight ratio of 10% and between 10 to 30%, respectively, while Obeid et al [ 130 ] used nanofibers of polylactic acid (PLA) filled with CaP incorporated into silica network (PLA-SiO 2 -CaP) as their filler material. The addition of CaP increased the surface hardness and the DC value of the RI, and positive calcium and phosphate ion release were observed under pH-cycling challenge for PLA-SiO 2 -CaP and RI-30% CaP, respectively [ 129 , 130 ]. The deposition of interprismatic mineral crystal was observed by Dai et al [ 129 ], suggesting the remineralising potential of the material.…”

Section: Future: Innovation To Improve the Current Rimentioning

confidence: 99%

Resin Infiltration of Non-Cavitated Enamel Lesions in Paediatric Dentistry: A Narrative Review

Dziaruddin

Zakaria

2022

Children

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The resin infiltration (RI) technique was introduced as one of the minimal intervention dentistry strategies in addressing dental caries among the paediatric population. This technique used the low-viscosity resin monomer to infiltrate the non-cavitated carious lesion and other developmental enamel porosities, thus allowing the conservation of the tooth structure. This narrative review aims to explore the value of RI in Paediatric Dentistry. Through our search of the literature, the development of the material, their clinical applications and shortcomings, as well as the innovation that has been carried out to improve the current RI, were discussed. There are number of high-level evidence supporting the use of RI in arresting non-cavitated proximal caries lesions in primary and permanent teeth, but its efficacy in managing anterior white spot lesions is still unclear. Limited penetration depth, not radiopaque and questionable long-term colour and material stability were among the limitation of the material. Various laboratory-based studies have been conducted to improve the current properties of RI. Nevertheless, RI has emerged as one of the important micro-invasive techniques in addressing non-cavitated and anterior white-spot enamel lesions in children and adolescents with great success.

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“…Nanofiber-reinforced composite resins have been introduced in the dental market and experimental resins have been developed, demonstrating significant improvement in physical-mechanical properties (Vidotti et al 2015;Salek et al 2018;Velo et al 2019;Obeid et al 2022). The increase in matrix strength and toughness of nanofiber-reinforced composites is mainly due to the reduced diameter and alignment of the nanofibers when compared to inorganic fillers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of shrinkage and polymerization shrinkage stress in resin composites reinforced by nanofibers – integrative literature review

Velo¹,

Obeid²,

Albergaria³

et al. 2023

JHS

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Even though it is considered a key factor in the clinical failure of the restoration, the shrinkage and polymerization shrinkage stress associated with resin composites reinforced by nanofibers have been little explored. Thus, the present study aimed to carry out an integrative literature review to evaluate the shrinkage and polymerization stress in resin composites reinforced by experimental nanofibers and available in the dental market, allowing support for decisionmaking in clinical practice. The MEDLINE-PubMed, Embase, Web of Science, Scopus, VHL (LILACS, BBO and IBECS), Cochrane, LIVIVO databases were used, without limitations regarding language and year of publication. The inclusion criteria used for the selection of articles were: in vitro studies, with no language restriction, published in the selected databases, with texts available in full and on the subject in studies. It was possible to analyze through this integrative literature review that more studies are needed to evaluate the polymerization shrinkage of resin composites reinforced by nanofibers and the effect of shrinkage stress. In general, the properties change according to the orientation of the fibers, and the short fibers seem to promote a lower rate of polymerization shrinkage.

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Effects of hybrid inorganic-organic nanofibers on the properties of enamel resin infiltrants – An in vitro study

Cited by 10 publications

References 81 publications

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

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

Resin Infiltration of Non-Cavitated Enamel Lesions in Paediatric Dentistry: A Narrative Review

Evaluation of shrinkage and polymerization shrinkage stress in resin composites reinforced by nanofibers – integrative literature review

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