Mineral deposition at dental adhesive resin containing niobium pentoxide

Collares, Fabrício Mezzomo; Portella, Fernando Freitas; Fraga, Guilherme Casara da Silva; Semeunka, Samantha Mendes; Almeida, Lucas de Castro Bartelega; Santos, Emerson da Rosa; Leitune, Vicente Castelo Branco; Samuel, Susana Maria Werner

doi:10.1186/s40563-014-0022-0

Cited by 16 publications

(8 citation statements)

References 30 publications

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“…The balance between the bioactivity and the physicochemical properties is a demand in the study of bioactive dental materials. Niobium pentoxide was shown to induce mineral deposition by the formation of a phosphate-rich layer on 2.5 wt.% and 5 wt.% loaded dental adhesives (Collares et al, 2014). Increasing the quantity of bioactive fillers into the adhesives could lead to a higher release of niobium compounds that may induce higher mineral formation in the adhesive layer as the availability of ions could cause deposition of mineral as described previously (Obata et al, 2012).…”

Section: Discussionmentioning

confidence: 66%

“…The ability to promote deposition and growth of hydroxyapatite crystals on its surface when in contact with simulated body fluid (Karlinsey and Yi, 2008), artificial or natural saliva (Karlinsey et al, 2006) was explored in different materials in dentistry (Mazur et al, 2015) (Lopes et al, 2014;Altmann et al, 2017;Balbinot et al, 2018;Balbinot et al, 2019;Marins et al, 2019;Balbinot et al, 2020a;Balbinot et al, 2020b;Marins et al, 2020). Nb 2 O 5 was studied in experimental adhesives (Leitune et al, 2013a;Collares et al, 2014;Marins et al, 2018), endodontic sealer (Leitune et al, 2013b), and glass ionomer cements (Garcia et al, 2016), improving their radiopacity (Leitune et al, 2013a;Leitune et al, 2013b;Garcia et al, 2016;Marins et al, 2018), physical properties (Leitune et al, 2013a;Leitune et al, 2013b) and inducing mineral deposition on adhesives surfaces (Collares et al, 2014). Increasing the Nb 2 O 5 content into the polymeric matrix may lead to modifications to the properties of the material.…”

Section: Introductionmentioning

confidence: 99%

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Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

et al. 2021

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The incorporation of metallic oxides in dental adhesives has been a strategy to confer improved radiopacity and physicochemical properties for polymers. Tailoring the structure of these fillers could contribute to their application in therapeutic strategies for dental restorations. The aim of this study was to evaluate the incorporation of niobic acid into experimental dental adhesives, and compare these adhesives to niobium pentoxide containing adhesives. A control group without Nb2O5·n H2O or Nb2O5 was also used for comparison. Niobium-based particles have been used as a feasible approach, mainly because of their bioactivity. In this study, hydrated niobium pentoxide, also called niobic acid (Nb2O5·n H2O), was incorporated into an experimental dental adhesive as a potential catalyst for monomer conversion. A base resin for dental adhesive was formulated with methacrylate monomers and photoinitiators. Two types of oxides were tested as filler for this adhesive: Nb2O5·n H2O or niobium pentoxide (Nb2O5). Both fillers were added separately into the experimental adhesive at 0, 2.5, 5, and 10 wt.%. One group without Nb2O5·n H2O or Nb2O5 (0 wt.% of filler addition) was used as a control group. The formulated materials were analyzed for radiopacity according to the ISO 4049 and used FTIR analysis to assess the degree of conversion (DC) and the maximum polymerization rate (RPmax). Mechanical properties were analyzed by ultimate tensile strength (UTS) in a testing machine. Softening in solvent was conducted by measuring Knoop microhardness before and after immersion of samples in ethanol. Normality of data was assessed with Shapiro-Wilk, and comparisons between factors were conducted with two-way ANOVA and Tukey at 5% of significance. Both fillers, Nb2O5 or Nb2O5·n H2O, increased the radiopacity of dental adhesives in comparison to the unfilled adhesive (p < 0.05). There were no differences among groups for the ultimate tensile strength (p > 0.05), and all groups containing Nb2O5 or Nb2O5·n H2O improved the resistance against softening in solvent (p < 0.05). The groups with 5 and 10 wt% addition of Nb2O5 showed decreased DC compared to the control group (p < 0.05), while the addition of Nb2O5·nH2O up to 10 wt% did not alter the DC (p > 0.05). The polymerization rate did not change among groups (p > 0.05). In conclusion, Nb2O5·n H2O is a promising filler to be incorporated into dental adhesives providing proper mechanical properties, improved resistance against solvents, and increased radiopacity, without changing the DC.

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Section: Discussionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

et al. 2021

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“…Niobium (Nb) is a metal that, even when used in small amounts, increases resistance, is highly biocompatible, and may improve the properties of different materials [16][17][18][19]. Little is known about the development of niobium silicate particles [20] and their use in dental composites, but the combination of niobium and silica may be an alternative to improve the mechanical properties of luting agents.…”

Section: Introductionmentioning

confidence: 99%

Niobium silicate as a filler for an experimental photopolymerizable luting agent

et al. 2021

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Purpose: To synthesize niobium silicate particles (SiNb) and incorporate into resin-based luting agents. Methods: SiNb particles were synthesized and characterized by x-ray diffraction, FTIR spectroscopy, particle size, and specific surface area. Luting agents were formulated with 50 wt% BisGMA, 30 wt% TEGDMA and 20 wt% UDMA. BAPO was used as a photoinitiator in 1mol%. The SiNb particles were incorporated into the agents at concentrations of 50 wt% (SiNb50%) or 65% wt% (SiNb65%). Barium glass particles at the same concentrations were used as controls (SiBa50% and SiBa65%). Refractive index, degree of conversion (DC), polymerization kinetics, softening in solvent, radiopacity, film thickness, color stability, flexural strength (FS) and micro shear bond strength (µSBS) were evaluated. Results: SiNb particles were successfully synthesized with an adequate structure to be applied as inorganic fillers. SiNb groups had higher DC, lower %ΔKHN, greater film thickness and greater radiopacity than the SiBa groups. Color stability was greater for SiNb50% and SiNb65% after six months of storage, as demonstrated by ΔE00. ΔWID values were lower for the SiBa groups. FS results decreased over time, and lower values were found for SiNb. In µSBS, the values of SiNb65% were higher at 24 h (45.22 MPa) and at six months (36.83 MPa), with statistically differences from values for the SiBa groups. Conclusions: SiNb particles were successfully synthesized using the sol-gel method, and their incorporation into luting agents at a concentration of up to 65% improved the physicomechanical characteristics and color stability of these agents.

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“…13 Furthermore, niobium pentoxide has shown to promote mineral deposition when in contact to artificial saliva. 10,14 Its addition to PIG could enhance chemical stability 15 leading to a long-term effect of bioglasses. Recent in vitro studies 10,16 evaluated the performance of an experimental orthodontic adhesive incorporated with PIG and niobium pentoxide, which showed improved mechanical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of an antibacterial orthodontic adhesive incorporated with niobium-based bioglass: an in situ study

et al. 2019

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This in situ study aimed to evaluate the antibacterial and anti-demineralization effects of an experimental orthodontic adhesive containing triazine and niobium phosphate bioglass (TAT) around brackets bonded to enamel surfaces. Sixteen volunteers were selected to use intra-oral devices with six metallic brackets bonded to enamel blocks. The experimental orthodontic adhesives were composed by 75% BisGMA and 25% TEGDMA containing 0% TAT and 20% TAT. Transbond XT adhesive (TXT) was used as a control group. Ten volunteers, mean age of 29 years, were included in the study. The six blocks of each volunteer were detached from the appliance after 7 and 14 days to evaluate mineral loss and bacterial growth including total bacteria, total Streptococci, Streptococci mutans, and Lactobacilli. Statistical analysis was performed using GLM model-univariate analysis of variance for microhardness and 2-way ANOVA for bacterial growth (p<0.05). The 20% TAT adhesive caused no difference between distances from bracket and the sound zone at 10-µm deep after 7 and 14 days. After 14 days, higher mineral loss was shown around brackets at 10-to 30-µm deep for TXT and 0% TAT adhesives compared to 20% TAT. S. mutans growth was inhibited by 20% TAT adhesive at 14 days. Adhesive with 20% TAT showed lower S. mutans and total Streptococci growth than 0% TAT and TXT adhesives. The findings of this study show that the adhesive incorporated by triazine and niobium phosphate bioglass had an anti-demineralization effect while inhibiting S. mutans and total Streptococci growth. The use of this product may inhibit mineral loss of enamel, preventing the formation of white spot lesions.

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Mineral deposition at dental adhesive resin containing niobium pentoxide

Cited by 16 publications

References 30 publications

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

Niobium silicate as a filler for an experimental photopolymerizable luting agent

Evaluation of an antibacterial orthodontic adhesive incorporated with niobium-based bioglass: an in situ study

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