Development of a novel aluminum-free glass ionomer cement based on magnesium/strontium-silicate glasses

Kim, Dong-Ae; Abo-Mosallam, H.A.; Lee, Hyeyoung; Kim, Gyu-Ri; Kim, Hae‐Won; Lee, Hae‐Hyoung

doi:10.1016/j.msec.2014.06.006

Cited by 25 publications

(16 citation statements)

References 53 publications

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“…The prepared glass powders were mixed with an aqueous solution of polyacrylic acid (PAA) of commercial product (HY-BOND Glasionomer CX Liquid, Shofu, Kyoto, Japan) to form GICs. The cement liquid was a 40~50% solution of PAA (average molar weight 62,500 g/mol) and 1~10 % tartaric acid in water 14 . The powder liquid ratio was fixed at 2:1 and mixed for 30 s. The commercial powder and liquid (HY-BOND Glasionomer kit, Shofu) was also mixed to prepare control sample.…”

Section: Methodsmentioning

confidence: 99%

“…Cylindrical specimens (4 mm Φ x 6 mm) for compressive strength testing, and bend bar specimens (2 mm x 2 mm x 25 mm) for flexural testing were made using stainless steel split molds according to ISO 9917-1. The samples were then kept in relative humidity of approximately 90% at 37°C for 1 h, removed from the molds and immersed into 50 mL of distilled water, then maintained at 37°C in an incubator for further 23 h, 7 days and 14 days prior to mechanical testing 14 . Ten specimens were made for each immersion time.…”

Section: Methodsmentioning

confidence: 99%

“…The flexural strength ( σ ) was calculated from the maximum load ( F ) using the following equation: σ=3 Fl/2bh 2 where l is the span length, b is the width, and h is the height of specimen. The flexural modulus ( E ) was determined from the following equation: E=l 3 m/4bh 3 where m is the slope (N/mm) of the linear portion of the load–displacement graph 14 .…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies, experimental glass ionomer cements based on ZnO and/or MgO-base glasses showed great potential for biomedical application. However, their mechanical properties were generally much lower than the conventional GIC based on aluminosilicate glasses 4 , 6 , 14 , demonstrating that aluminum plays a key role in the GIC hardening and strengthening 19 .…”

Section: Introductionmentioning

confidence: 96%

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Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

et al. 2015

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Some weaknesses of conventional glass ionomer cement (GIC) as dental materials, for instance the lack of bioactive potential and poor mechanical properties, remain unsolved. Objective The purpose of this study was to investigate the effects of the partial replacement of CaO with MgO or ZnO on the mechanical and biological properties of the experimental glass ionomer cements.Material and Methods Calcium fluoro-alumino-silicate glass was prepared for an experimental glass ionomer cement by melt quenching technique. The glass composition was modified by partial replacement (10 mol%) of CaO with MgO or ZnO. Net setting time, compressive and flexural properties, and in vitro rat dental pulp stem cells (rDPSCs) viability were examined for the prepared GICs and compared to a commercial GIC.Results The experimental GICs set more slowly than the commercial product, but their extended setting times are still within the maximum limit (8 min) specified in ISO 9917-1. Compressive strength of the experimental GIC was not increased by the partial substitution of CaO with either MgO or ZnO, but was comparable to the commercial control. For flexural properties, although there was no significance between the base and the modified glass, all prepared GICs marked a statistically higher flexural strength (p<0.05) and comparable modulus to control. The modified cements showed increased cell viability for rDPSCs.Conclusions The experimental GICs modified with MgO or ZnO can be considered bioactive dental materials.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

et al. 2015

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“…The tested filler was not able to interact specially due to its insolubility in the medium. At higher oxide concentrations, the disruption of the glass network [10] or the low wetness of the glass particles by the acid [31] can decrease GICs’ physical properties. However, Nb 2 O 5 did not altered the compressive strength of the experimental cements in any concentration added.…”

Section: Discussionmentioning

confidence: 99%

Influence of niobium pentoxide addition on the properties of glass ionomer cements

García

Leitune

Balbinot

et al. 2016

Acta Biomaterialia Odontologica Scandinavica

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Objective: To determine the influence of niobium pentoxide (Nb2O5) addition on the physical and chemical properties of glass ionomer cements (GICs). Materials and methods: Five, 10 or 20 wt.% of Nb2O5 were incorporated into commercial GICs (Maxxion R, Vitro Molar, Vitro Fil R) and one group of each GIC remained without Nb2O5 (control groups). The GICs were evaluated by Knoop hardness, compressive strength, acid erosion, particle size and radiopacity. Data were analyzed by two-way ANOVA followed by Tukey's test. Results: The addition of 10% and 20% reduced the microhardness of two GICs (p < .05). Compressive strength showed no difference among groups (p > .05). Nb2O5 did not influence Maxxion R and Vitro Fil R regarding the acid erosion test (p > .05). Vitro Molar increased its acid erosion with 10% of Nb2O5 (p < .05). Maxxion R presented 15.78 μm, while Vitro Molar and Vitro Fil R showed 5.14 μm and 6.18 μm, respectively. As the Nb2O5 concentration increased, the radiopacity increased for all groups. Vitro Molar and Vitro Fil R did not present significant difference to at least 1 mm aluminum (p > .05). Conclusion: The addition of 5 wt.% Nb2O5 did not affect the tested physical and chemical properties of the GICs and improved the radiopacity of one of the cements. These materials are therefore suitable for further testing of biomimetic remineralization properties.

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Root‐End Filling and Perforation Repair Materials and Techniques

Camilleri

Pertl

2021

Endodontic Materials in Clinical Practice

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Development of a novel aluminum-free glass ionomer cement based on magnesium/strontium-silicate glasses

Cited by 25 publications

References 53 publications

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

Biological and mechanical properties of an experimental glass-ionomer cement modified by partial replacement of CaO with MgO or ZnO

Influence of niobium pentoxide addition on the properties of glass ionomer cements

Root‐End Filling and Perforation Repair Materials and Techniques

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