Influence of hydroxyapatite nanoparticles on the properties of glass ionomer cement

Alatawi, Raedah A.S.; Elsayed, Nadia H.; Mohamed, Wael S.

doi:10.1016/j.jmrt.2018.01.010

Cited by 68 publications

(48 citation statements)

References 21 publications

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“…In fact, adding HA particles to Fuji IX powder resulted in reduced CS, DTS, and FS when compared to the samples without HA. Although the absolute values of the three mechanical properties recorded cannot be compared with the values in other studies due to different experimental settings, we can notice that the trend of reduced CS after the addition of HA particles in the present study is not in agreement with the results of a study by Alatawi et al [15], which indicated that GICs with different quantities of incorporated nanoHA resulted in higher CS values. It could be that the incorporated particles in the present study interfered with the reaction between the modified powder and liquid, thus reducing polysalt formation, since the HA particles used in this study were relatively large, the surface area was smaller, and the quantity of released ions that participated in the acid-base reaction between polyacrylic acid and powder was relatively lower [17,34].…”

Section: Discussioncontrasting

confidence: 99%

“…It could be that the incorporated particles in the present study interfered with the reaction between the modified powder and liquid, thus reducing polysalt formation, since the HA particles used in this study were relatively large, the surface area was smaller, and the quantity of released ions that participated in the acid-base reaction between polyacrylic acid and powder was relatively lower [17,34]. On the other hand, in a study by Alatawi et al [15], nanoHA could participate in each GIC polysalt bridge formation during setting, leading to improved mechanical properties of the cements [27,35]. Besides, the trend of reduced values in this study could be assigned to the soaking of the specimens in distilled water for a week, which could lead to a gradual degradation of bonds between HA particles and the GIC matrix [10].…”

Section: Discussionmentioning

confidence: 82%

“…Moreover, many studies have shown that the incorporation of various fillers into cement powder, including stainless steel, silver, zirconia, zinc, carbon and aluminosilicate fibers, cellulose, titanium dioxide, hydroxyapatite (HA) and others, have resulted in improved mechanical properties [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Glass Ionomer Cements after Incorporation of Marine Derived Hydroxyapatite

et al. 2020

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The purpose of this study was to evaluate the effects of the incorporation of hydroxyapatite (HA) derived from cuttlefish bone on the mechanical properties of glass ionomer cements (GIC). Fuji II LC and Fuji IX GP Extra (GC Corporation, Tokyo, Japan) were used in the study. There were four groups (n = 11–18) for each material: a group without the addition of HA particles and three groups modified by incorporation of 2, 5, and 10 wt% HA. The tests were performed on a universal testing machine (Shimadzu, Duisburg, Germany) and descriptive statistics, two-way analysis of variance (ANOVA) for the comparison of three mechanical properties, and one-way ANOVA for the comparison of different concentrations for each material were performed. Regarding the Fuji IX groups, compressive strength (CS) and flexural strength (FS) were highest in the group without HA particles added. The differences in CS between the Fuji IX group without HA particles and the Fuji IX groups with 2 wt% HA and 10 wt% HA were significant. The Fuji II 5 wt% HA group exhibited higher diametral tensile strength (DTS) and CS than other Fuji II groups, but not significantly. The Fuji II group, modified with 10 wt% HA, exhibited significantly higher FS than the Fuji II group without HA particles (p < 0.05). Porous HA incorporated into the Fuji IX groups had a significant impact on mechanical properties only in the Fuji IX 5 wt% HA group. Fuji II groups modified with 10 wt% HA showed the most favorable results with respect to FS.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 82%

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Mechanical Properties of Glass Ionomer Cements after Incorporation of Marine Derived Hydroxyapatite

et al. 2020

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“…The influence of hydroxyapatite on the GIC polysalt bridge formation level and its setting reaction may justify maintaining the compressive strength value of the GIC [36]. This concurs with the result from Alatawi et al, where it was found that the addition of hydroxyapatite to the glass ionomer improved its mechanical properties [37]. The addition of bovine dentin to the GIC cement showed similar compressive strength to the control group.…”

Section: Discussionsupporting

confidence: 88%

Biomodification of a Class-V Restorative Material by Incorporation of Bioactive Agents

et al. 2019

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Restoring subgingival class-V cavities successfully, demand special biological properties from a restorative material. This study aimed to assess the effects of incorporating bioactive materials to glass ionomer cement (GIC) on its mechanical and biological properties. Hydroxyapatite, chitosan, chondroitin sulphate, bioglass, gelatine and processed bovine dentin were incorporated into a GIC restorative material. Compressive strength, biaxial flexural strength (BFS), hardness, setting and working time measurements were investigated. Biocompatibility of the new materials was assessed using both monolayer cell cultures of normal oral fibroblasts (NOF) and TR146 keratinocytes, and a 3D-tissue engineered human oral mucosa model (3D-OMM) using presto-blue tissue viability assay and histological examination. Significant reduction in the compressive strength and BFS of gelatine-modified discs was observed, while chondroitin sulphate-modified discs had reduced BFS only (p value > 0.05). For hardness, working and setting times, only bioglass caused significant increase in the working time. NOF viability was significantly increased when exposed to GIC-modified with bovine dentine, bioglass and chitosan. Histological examination showed curling and growth of the epithelial layer toward the disc space, except for the GIC modified with gelatine. This study has highlighted the potential for clinical application of the modified GICs with hydroxyapatite, chitosan, bioglass and bovine dentine in subgingival class-V restorations.

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“…Other inorganic nanoparticles examined as additives for glass-ionomer cements have been hydroxyapatite [87] and fosterite [88]. The first of these was found to show enhanced antimicrobial activity against Streptococcus mutans bacteria, though no information was given on any changes in mechanical properties [87]. The latter was studied entirely for its effects on mechanical properties when added at levels in the range 1-4 weight %.…”

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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Influence of hydroxyapatite nanoparticles on the properties of glass ionomer cement

Cited by 68 publications

References 21 publications

Mechanical Properties of Glass Ionomer Cements after Incorporation of Marine Derived Hydroxyapatite

Mechanical Properties of Glass Ionomer Cements after Incorporation of Marine Derived Hydroxyapatite

Biomodification of a Class-V Restorative Material by Incorporation of Bioactive Agents

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

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