Long-term flexural strength, of glass ionomer cements

AbstractIn this work, we investigated the effects of strontium incorporation in the glass phase of glass ionomer cements (GIC). Three different glass compositions were synthesized with 0, 5, and 10 mol% of SrO addition. GICs were prepared by the addition of 50 wt% polyacrylic acid (PAA) at powder to liquid ratio of 1:1.5. Initial characterization on the cement series was to study their rheological behavior. Cements represented working times between 50-64 seconds and setting times of 356-452 seconds. Rheological results indicated that the addition of strontium decreases the working and setting times of the cements. To analyze the mechanical properties, compressive and flexural strength studies were performed after 1, 10, and 30 days incubation in simulated body fluid. The compressive strength of the cements increased as a function of incubation time, with the strontium containing compositions showing the highest strength at 34 MPa and after 30 days of incubation. Biaxial flexural strength of the cements was not significantly affected by the composition and maturation time and ranged between 13.4 to 16.3 MPa. In-vitro bioactivity of the cements was analyzed using SBF trials and after 1, 10, and 30 days incubation periods. Strontium containing cements, showed higher solubility with higher amounts of calcium phosphate surface depositions only after 10 days incubation. The elemental identifications of the surface depositions indicated high amounts of Ca, P and Zn are present on the surface of SBF incubated samples.

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Glass-ionomer Cements in Restorative Dentistry: A Critical Appraisal

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1850 ◽

2016 ◽

Vol 17 (4) ◽

pp. 331-336 ◽

Cited By ~ 9

Author(s):

Mohammed Almuhaiza

Keyword(s):

Critical Appraisal ◽

Fluoride Release ◽

Restorative Material ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Metallic Ions ◽

Restorative Dentistry ◽

Tooth Structure ◽

Wide Range

ABSTRACT Glass-ionomer cements (GICs) are mainstream restorative materials that are bioactive and have a wide range of uses, such as lining, bonding, sealing, luting or restoring a tooth. Although the major characteristics of GICs for the wider applications in dentistry are adhesion to tooth structure, fluoride releasing capacity and tooth-colored restorations, the sensitivity to moisture, inherent opacity, long-term wear and strength are not as adequate as desired. They have undergone remarkable changes in their composition, such as the addition of metallic ions or resin components to their composition, which contributed to improve their physical properties and diversified their use as a restorative material of great clinical applicability. The lightcured polymer reinforced materials appear to have substantial benefits, while retaining the advantages of fluoride release and adhesion. Further research should be directed towards improving the properties, such as strength and esthetics without altering its inherent qualities, such as adhesion and fluoride releasing capabilities. How to cite this article Almuhaiza M. Glass-ionomer Cements in Restorative Dentistry: A Critical Appraisal. J Contemp Dent Pract 2016;17(4):331-336.

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Long-term flexural strengths of resin-modified glass-ionomer cements

Biomaterials ◽

10.1016/s0142-9612(98)00079-9 ◽

1998 ◽

Vol 19 (18) ◽

pp. 1703-1713 ◽

Cited By ~ 11

Author(s):

W. Kanchanavasita ◽

H.M. Anstice ◽

G.J. Pearson

Keyword(s):

Glass Ionomer Cements ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer

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Glass-ionomer Cements of Improved Flexural Strength

Journal of Dental Research ◽

10.1177/00220345860650021101 ◽

1986 ◽

Vol 65 (2) ◽

pp. 146-148 ◽

Cited By ~ 82

Author(s):

H.J. Prosser ◽

D.R. Powis ◽

A.D. Wilson

Keyword(s):

Flexural Strength ◽

Glass Ionomer Cements ◽

Glass Ionomer

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Glass ionomer cements with milled, dry chlorhexidine hexametaphosphate filler particles to provide long-term antimicrobial properties with recharge capacity

Dental Materials ◽

10.1016/j.dental.2018.09.003 ◽

2018 ◽

Vol 34 (12) ◽

pp. 1717-1726

Author(s):

Candice A. Bellis ◽

Owen Addison ◽

Angela H. Nobbs ◽

Peter F. Duckworth ◽

James A. Holder ◽

...

Keyword(s):

Antimicrobial Properties ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Filler Particles

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Influence of Strontium on the Physical, Mechanical and In-Vitro Bioactivity of Glass Ionomer Cements

Journal of Modern Materials ◽

10.21467/jmm.6.1.30-39 ◽

2019 ◽

Vol 6 (1) ◽

pp. 30-39

Author(s):

Yiyu Li

Keyword(s):

Flexural Strength ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

In Vitro Bioactivity ◽

Maturation Time ◽

Setting Times ◽

Incubation Periods ◽

Strontium Incorporation ◽

Glass Compositions

In this work, we investigated the effects of strontium incorporation in the glass phase of glass ionomer cements (GIC). Three different glass compositions were synthesized with 0, 5, and 10 mol% of SrO addition. GICs were prepared by the addition of 50 wt% polyacrylic acid (PAA) at powder to liquid ratio of 1:1.5. Initial characterization on the cement series was to study their rheological behavior. Cements represented working times between 50-64 seconds and setting times of 356-452 seconds. Rheological results indicated that the addition of strontium decreases the working and setting times of the cements. To analyze the mechanical properties, compressive and flexural strength studies were performed after 1, 10, and 30 days incubation in simulated body fluid (SBF). The compressive strength of the cements increased as a function of incubation time, with the strontium containing compositions showing the highest strength at 34 megapascal (MPa) and after 30 days of incubation. Biaxial flexural strength of the cements was not significantly affected by the composition and maturation time and ranged between 13.4 to 16.3 MPa. In-vitro bioactivity of the cements was analyzed using SBF trials and after 1, 10, and 30 days incubation periods. Strontium containing cements, showed higher solubility with higher amounts of calcium phosphate surface depositions only after 10 days incubation. The elemental identifications of the surface depositions indicated high amounts of Ca, P and Zn are present on the surface of SBF incubated samples.

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