The Incorporation of Nanoparticles into Conventional Glass-Ionomer Dental Restorative Cements

Gjorgievska, Elizabeta; Tendeloo, Gustaaf Van; Nicholson, John W.; Coleman, Nichola J.; Slipper, Ian J.; Booth, Samantha E.

doi:10.1017/s1431927615000057

Cited by 53 publications

(53 citation statements)

References 19 publications

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“…The mechanical properties of nanofilled composite resins were considered as good as those of universal hybrids (Rastelli et al, 2012). Some studies investigated the use of different nano and microparticles in dental materials, including ZnO, concluding that the use of these particles in small concentrations does not interfere with the mechanical properties of the composite resin (Chen, Yu, Wang, & Li, 2011;Gjorgievska et al, 2015;Sevinç & Hanley, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The main cause of secondary caries is the accumulation of dental plaque on the surface of dental restorative materials, resulting in the need of replacement of restorations (Burke et al, ; Sakaguchi, ). The use of nano and microparticles to modify dental restorative materials have been grown and researches are focused in development of a restorative material resistant to bacterial accumulation (Gjorgievska et al, ; Corrêa et al, ). The incorporation of metal oxides is one of the approaches that have been used to achieve antibacterial activity into the resin‐based restorative materials (Wang, Shen, & Haapasalo, ).…”

Section: Introductionmentioning

confidence: 99%

“…The use of nano and microparticles to modify dental restorative materials have been grown and researches are focused in development of a restorative material resistant to bacterial accumulation (Gjorgievska et al, 2015;Corrêa et al, 2015). The incorporation of metal oxides is one of the approaches that have been used to achieve antibacterial activity into the resin-based restorative materials (Wang, Shen, & Haapasalo, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zinc oxide 3Dmicrostructures as an antimicrobial filler content for composite resins

Dias

Bernardi

Ramos

et al. 2017

Microscopy Res & Technique

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The aim of this study was to evaluate the antibacterial activity of a composite resin modified by 3D zinc oxide (ZnO) microstructures and to verify possible alterations on its mechanical properties. ZnO was synthesized by hydrothermal approach and characterized by X-ray diffraction (XRD), surface area by Brunauer, Emmett and Teller (BET), Fourier transform infrared spectroscopy (FTIR) and Field emission scanning electron microscopy (FESEM). The minimum inhibitory concentrations of ZnO against Streptococcus mutans, Escherichia coli, Staphylococcus aureus, and Candida albicans were determinated. The composite resin Filtek Z350XT (3M of Brazil) was blended with 0.2%, 0.5%, and 1% in weight of ZnO and submitted to antibacterial assay by direct contact test against S. mutans, the leading cause of dental caries and the most cariogenic oral streptococci. Additionally, it was performed compressive and diametral tensile strength tests of the modified composite resin. Microrods and hollow microrods of ZnO were obtained and its MIC values were found to be 125 μg/mL for S. mutans, 500 μg/mL for C. albicans and 62.5 μg/mL for S. aureus. For the tested concentrations, it was not found MIC against E. coli. The direct contact test showed a significant antibacterial capacity of modified composite resin (p > 0.05 for all concentrations). The compressive and diametral tensile strength remains no changed after inclusion of microparticles (p > 0.05 for all concentrations). The modification of the composite resin with small amounts of ZnO microparticles significantly inhibited the S. mutans growth on resin surface without significant alterations of its mechanical strength.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zinc oxide 3Dmicrostructures as an antimicrobial filler content for composite resins

Dias

Bernardi

Ramos

et al. 2017

Microscopy Res & Technique

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“…Modified GICs produced by incorporation of different types of nanoparticles have been shown to have fewer air voids and internal microcracks, presumably because they are easier to mix than unmodified cements. In some cases this has resulted in greater compressive strengths [18].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Impact of the Addition of Nanoparticles on the Properties of Glass–Ionomer Cements

Gjorgievska¹,

Nicholson²,

Gabrić

et al. 2020

Materials

Self Cite

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The aim of the study was to evaluate the effects of incorporation of Al2O3, ZrO2 and TiO2 nanoparticles into glass–ionomer cements (GICs). Two different GICs were used in the study. Four groups were prepared for each material: the control group (without nanoparticles) and three groups modified by the incorporation of nanoparticles at 2, 5 or 10 wt %, respectively. Cements were mixed and placed in moulds (4 mm × 6 mm); after setting, the samples were stored in saline (one day and one week). Compressive strengths were measured and the morphology of the fractured surfaces was analyzed by scanning electron microscopy. The elements released into the storage solutions were determined by Inductively coupled plasma-optical emission spectrometry (ICP-OES). Addition of nanoparticles was found to alter the appearance of cements as examined by scanning electron microscopy. Compressive strength increased with the addition of ZrO2 and especially TiO2 nanoparticles, whereas the addition of Al2O3 nanoparticles generally weakened the cements. The ion release profile of the modified cements was the same in all cases. The addition of Al2O3, ZrO2 and TiO2 nanoparticles into GICs is beneficial, since it leads to reduction of the microscopic voids in the set cement. Of these, the use of ZrO2 and TiO2 nanoparticles also led to increased compressive strength. Nanoparticles did not release detectable levels of ions (Al, Zr or Ti), which makes them suitable for clinical use.

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“…In the specialized literature, a number of studies have reported the successful association of TiO 2 nanotubes with PMMA bone cement [17] and flowable dental composites [16]. Also, the incorporation of TiO 2 nanoparticles in dental resins [19,20] and glass-ionomer cements [21] has resulted in enhanced mechanical properties. However, some studies have suggested that using nanoparticles to enhance the mechanical properties of materials may not be successful due to nanoparticle agglomeration [16,19,22], and, also, so far there are no studies reporting TiO 2 nanostructures' incorporation in ceramic materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of Y-TZP blank manufacturing control and addition of TiO2 nanotubes on structural reliability of dental materials

Magalhães

Fortulan

Lisboa‐Filho

et al. 2018

Ceramics International

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Titanium dioxide (TiO 2) nanotubes have been applied to enhance the mechanical and biological properties of dental materials. Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) have been increasingly used in dentistry as a substructure for crowns and fixed partial prostheses. Aside from its optimal clinical results, Y-TZP is prone to failures due to microstructure-related defects introduced in the manufacturing process that may lower its structural and clinical reliability. The purpose of this study was to evaluate the role of the manufacturing process of blanks as well as their original composition modification by addition of TiO 2 nanotubes (0%, 1%, 2% and 5% in volume) while controlling all manufacturing steps. Materials were subjected to a biaxial flexural strength test, a fractographic qualitative analysis by scanning electron microscopy (SEM), a microstructure evaluation in field emission-SEM and X-ray diffraction. Values of flexural strength were subjected to ANOVA, Tukey (α = 0.05) and Weibull statistics. Grain size values were subjected to Kruskal-Wallis and Dunn tests (α = 0.05). Highlights of the results include that for experimental Y-TZP added 2% vol TiO 2 nanotube ceramics presented flexural strength values at 577 MPa and Weibull modulus (m) at 8.1. The addition of TiO 2 nanotubes in different blends influenced experimental Y-TZP properties, leading to lower flexural strength, although they presented higher m than the commercial Y-TZP. Nanotubes also led to bigger grain sizes, more pores and a slight increase in the monoclinic phase, influencing the microstructure of Y-TZP. Y-TZP blank manufacturing control as well as addition of TiO 2 nanotubes led to higher m values and, hence, greater structural reliability.

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The Incorporation of Nanoparticles into Conventional Glass-Ionomer Dental Restorative Cements

Cited by 53 publications

References 19 publications

Zinc oxide 3Dmicrostructures as an antimicrobial filler content for composite resins

Zinc oxide 3Dmicrostructures as an antimicrobial filler content for composite resins

Assessment of the Impact of the Addition of Nanoparticles on the Properties of Glass–Ionomer Cements

Effects of Y-TZP blank manufacturing control and addition of TiO2 nanotubes on structural reliability of dental materials

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