Titanium dioxide nanotubes with triazine-methacrylate monomer to improve physicochemical and biological properties of adhesives

Stürmer, Michele; García, Isadora Martini; Souza, Virgínia S.; Visioli, Fernanda; Scholten, Jackson D.; Samuel, S.M.W.; Leitune, Vicente Castelo Branco; Collares, Fabrício Mezzomo

doi:10.1016/j.dental.2020.11.004

Cited by 22 publications

(19 citation statements)

References 67 publications

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“…Resins with inorganic fillers, such as the metallic oxides here tested, are less susceptible to suffer chemical degradation mainly because ionic bonding between atoms in oxides is more stable than covalent bonding within the organic matrix. Therefore, adhesives doped with inorganic fillers can present lower softening in solvent compared to unfilled adhesives (Stürmer et al, 2020). Irrespective of the concentration of Nb 2 O 5 or Nb 2 O 5 •nH 2 O, both materials provided successful decreased softening for the dental adhesives.…”

Section: Discussionmentioning

confidence: 99%

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: 99%

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

et al. 2021

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“…Nanoparticles of TiO 2 are the nanostructures of titania more tested in dental materials so far. In restorative materials, nanoparticles of TiO 2 improved the hardness, flexural strength, degree of conversion, elastic modulus, shear bond strength, and antibacterial activity [123][124][125][126][127]. Currently, nt-TiO 2 have also been tested because they have the advantage of presenting a hollow structure able to carry drugs, acting as a nanocarrier.…”

Section: Halloysite Nanotubes (Hnt)mentioning

confidence: 99%

“…In a recent study, nt-TiO 2 were added into a dental adhesive. These fillers carried a triazine-based molecule called 1,3,5-Trimethylhexahydro-1,3,5-triazine [126]. The nt-TiO 2 loaded with the triazine-based molecule assisted in maintaining the µ-tensile bond strength over time and provided antibacterial activity.…”

Section: Boron Nitride Nanotubesmentioning

confidence: 99%

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Metal Oxide Nanoparticles and Nanotubes: Ultrasmall Nanostructures to Engineer Antibacterial and Improved Dental Adhesives and Composites

et al. 2021

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Advances in nanotechnology have unlocked exclusive and relevant capabilities that are being applied to develop new dental restorative materials. Metal oxide nanoparticles and nanotubes perform functions relevant to a range of dental purposes beyond the traditional role of filler reinforcement—they can release ions from their inorganic compounds damaging oral pathogens, deliver calcium phosphate compounds, provide contrast during imaging, protect dental tissues during a bacterial acid attack, and improve the mineral content of the bonding interface. These capabilities make metal oxide nanoparticles and nanotubes useful for dental adhesives and composites, as these materials are the most used restorative materials in daily dental practice for tooth restorations. Secondary caries and material fractures have been recognized as the most common routes for the failure of composite restorations and bonding interface in the clinical setting. This review covers the significant capabilities of metal oxide nanoparticles and nanotubes incorporated into dental adhesives and composites, focusing on the novel benefits of antibacterial properties and how they relate to their translational applications in restorative dentistry. We pay close attention to how the development of contemporary antibacterial dental materials requires extensive interdisciplinary collaboration to accomplish particular and complex biological tasks to tackle secondary caries. We complement our discussion of dental adhesives and composites containing metal oxide nanoparticles and nanotubes with considerations needed for clinical application. We anticipate that readers will gain a complete picture of the expansive possibilities of using metal oxide nanoparticles and nanotubes to develop new dental materials and inspire further interdisciplinary development in this area.

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“…UV-Vis spectroscopy has been applied to study fillers for dental adhesive resins [ 123 ], to assess the risk of chemical irritation, allergic reactions and oral hypersensitivity due to the elution of polymers [ 124 ], to evaluate new co-initiators useful in the radical photopolymerization of dental polymers [ 94 , 125 ]. This technique was also used to characterize the colour and spectral reflectance and thickness oxide layer [ 126 ] and resin [ 127 ], to evaluate the transparency of ceramics [ 128 , 129 ], and to assesses the degradation rate of CH-based scaffolds which play a key role in endodontic regeneration periodontal regeneration material [ 130 ].…”

Section: Ultraviolet and Visible Spectroscopy (Uv-vis)mentioning

confidence: 99%

Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

et al. 2021

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The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and Mass Spectrometry (MS), which are widely employed in the investigation of the surface properties of dental materials. Examples of the research of materials used as tooth fillings, surface preparation in dental prosthetics, cavity preparation methods and fractographic studies of dental implants are also presented. The cited studies show that the above techniques can be valuable tools as they are expanding the research capabilities of materials used in dentistry.

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Titanium dioxide nanotubes with triazine-methacrylate monomer to improve physicochemical and biological properties of adhesives

Cited by 22 publications

References 67 publications

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

Physicochemical Effects of Niobic Acid Addition Into Dental Adhesives

Metal Oxide Nanoparticles and Nanotubes: Ultrasmall Nanostructures to Engineer Antibacterial and Improved Dental Adhesives and Composites

Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

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