Novel Nanotechnology of TiO<sub>2</sub>Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement

Cibim, Daniela Dellosso; Saito, Motoi; Giovani, Priscila Alves; Borges, Ana Flávia Sanches; Pecorari, Vanessa Gallego Arias; Gomes, Orisson Ponce; Lisboa‐Filho, Paulo Noronha; Nociti, Francisco Humberto; Puppin-Rontani, Regina Maria; Kantovitz, Kamila Rosamilia

doi:10.1155/2017/7123919

Cited by 43 publications

(61 citation statements)

References 35 publications

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“…Other studies, however, have confirmed the reinforcing effect of nanoparticles [80,82,83]. A variety of nanoparticles have been used, such as titanium dioxide nanotubes [83] and nanoparticles [81,82], alumina nanoparticles [83], and zirconia nanoparticles [84]. Glass-ionomer cements with added nanoparticles have been found to be easier to mix than those without nanoparticles [85] and to contain fewer air voids or internal micro-cracks [86].…”

Section: Nanoparticle Reinforcementmentioning

confidence: 99%

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

2020

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This paper reviews the strategies that have been reported in the literature to attempt to reinforce glass-ionomer dental cements, both conventional and resin-modified. These cements are widely used in current clinical practice, but their use is limited to regions where loading is not high. Reinforcement might extend these applications, particularly to the posterior dentition. A variety of strategies have been identified, including the use of fibres, nanoparticles, and larger particle additives. One problem revealed by the literature survey is the limited extent to which researchers have used International Standard test methods. This makes comparison of results very difficult. However, it does seem possible to draw conclusions from this substantial body of work and these are (1) that powders with conventional particle sizes do not reinforce glass-ionomer cements, (2) certain fibres and certain nanoparticles give distinct improvements in strength, and (3) in the case of the nanoparticles these improvements are associated with differences in the morphology of the cement matrix, in particular, a reduction in the porosity. Despite these improvements, none of the developments has yet been translated into clinical use.

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Section: Nanoparticle Reinforcementmentioning

confidence: 99%

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

2020

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“…The other constituents were polymeric materials which do not present peaks in an XRD pattern but appear as wide bands due to their amorphous structure. Other studies also showed that SiO 2 is the major component of this material [36][37][38][39][40]. On the other hand, ZrO 2 presented a crystalline structure, with characteristic peaks in the XRD pattern (Fig.…”

Section: Resultsmentioning

confidence: 64%

Properties of zirconia-containing glass-ionomer cement

et al. 2019

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Glass-ionomer cements (GICs) are used as restorative dental materials due to their capacity to chemically adhere to enamel and dentin, low thermal expansion coefficient, and compatibility with dental structures. However, these materials have low resistance to wear and fracture. In this work, zirconia-reinforced GICs were prepared to evaluate the influence of particle size as well as ZrO2 content on their properties. All evaluated composites presented compressive strength values above the pure GIC strength. The highest compressive strength values were obtained with the addition of 8.5 wt% ZrO2. The average roughness obtained was not significantly changed compared to commercial GIC and the lowest value was for the composite with 10 wt% ZrO2 (50 mesh). In the microhardness test, the highest values were obtained with the addition of 8.5 wt% of ZrO2. Therefore, the results indicated that the addition of ZrO2 to GIC is an effective alternative to improve the quality of dental restorations.

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“…Nanodentistry is an emerging area in dentistry and uses nanostructured materials to diagnose, treat and prevent oral diseases, and exhibit improved properties compared to conventional ones 31 . In particular, there is much expectation regarding the use of AgVO 3 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Thermomechanical Fatigue on Shear Strength between a Conventional and an Experimental Polymer for Prosthetic Application

et al. 2019

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The incorporation of antimicrobial agents may influence the mechanical properties of acrylic resins. Thus, the use of these agents only in regions of dental prostheses subject to greater contamination may be an alternative. This study evaluates the effect of thermomechanical fatigue on the bond strength between a conventional and an experimental acrylic resin incorporated with nanostructured silver vanadate decorated with silver nanoparticles (AgVO3). 60 specimens (Ø13mm x 23mm height) in self-curing resin were obtained and divided into groups according to the experimental resin incorporated with AgVO3 (Ø4mm x 6mm height): G1–Conventional x Conventional, G2–Conventional x 2.5% of AgVO3, G3–Conventional x 5% of AgVO3. Ten samples of each group were subjected to bond strength analysis after manufacture, and 10 were previously submitted to 1.200.000 cycles with 98N load and 2Hz/second frequency and alternating baths of 5 ºC, 37ºC and 55 ºC. The fracture area was analyzed. The data were submitted to analysis of variance of two-factors with Bonferroni adjustment for post hoc comparisons (α=0.05) was used. The fatigue did not affect the bond strength (p=0.416), however, there was influence of the AgVO3 concentration on the bond strength between the resins (p=0.013). Mixed failures with adhesive predominance were observed in samples without AgVO3 and cohesive failures in samples with the nanomaterial. The use of AgVO3 can improve or maintain the bond strength between resins with no thermomechanical fatigue influence. Keywords: Acrylic Resins. Products with Antimicrobial Action. Nanotechnology. Thermomechanical fatigue ResumoA incorporação de agentes antimicrobianos pode influenciar nas propriedades mecânicas de resinas acrílicas. Desta forma, o uso destes agentes apenas em regiões das próteses dentárias sujeitas a maior contaminação pode ser uma alternativa. Este estudo avalia o efeito da fadiga termomecânica na resistência de união entre uma resina acrílica convencional e uma experimental incorporada com vanadato de prata nanoestruturado decorado com nanopartículas de prata (AgVO3). Foram obtidos 60 espécimes (Ø13mm x 23mm de altura) em resina autopolimerizável, divididos em grupos de acordo com a resina experimental incorporada com AgVO3 (Ø4mm x 6mm de altura): G1-Convencional x Convencional, G2-Convencional x 2,5% de AgVO3, G3 -Convencional x 5% de AgVO3. Dez amostras de cada grupo foram submetidas à análise de resistência à união após a confecção e 10 foram submetidas previamente a 1.200.000 ciclos com carga de 98 N e frequência de 2Hz/segundo e banhos alternados de 5 ºC, 37 ºC e 55 ºC. A área de fratura foi analisada. Os dados foram submetidos à análise de variância de dois fatores com ajuste de Bonferroni para comparações pos hoc (α = 0,05). A fadiga não afetou a força de união (p=0,416), no entanto, houve influência da concentração de AgVO3 na resistência de união entre as resinas (p=0,013). Falhas mistas com predominância adesiva foram observadas nas amostras sem AgVO3 e falhas coesivas nas amostras contendo o nanomaterial. O uso de AgVO3 pode melhorar ou manter a resistência da união entre as resinas sem influência da fadiga termomecânica. Palavras-chave: Resinas Acrílicas. Produtos com Ação Antimicrobiana. Nanotecnologia.

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Novel Nanotechnology of TiO₂Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement

Cited by 43 publications

References 35 publications

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

Properties of zirconia-containing glass-ionomer cement

Effect of Thermomechanical Fatigue on Shear Strength between a Conventional and an Experimental Polymer for Prosthetic Application

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Novel Nanotechnology of TiO2Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement

Cited by 43 publications

References 35 publications

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review

Properties of zirconia-containing glass-ionomer cement

Effect of Thermomechanical Fatigue on Shear Strength between a Conventional and an Experimental Polymer for Prosthetic Application

Contact Info

Product

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Novel Nanotechnology of TiO₂Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement