Physical property investigation of contemporary glass ionomer and resin-modified glass ionomer restorative materials

Moberg, Matthew; Brewster, John; Nicholson, J. W. G.; Roberts, Howard W.

doi:10.1007/s00784-018-2554-3

Cited by 38 publications

(42 citation statements)

References 86 publications

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“…For example, the fracture toughness at 24 h of a number of commercial conventional glass-ionomers ranged from 0.18 to 0.30 MPa m 1 /2 compared with 0.49-0.67 MPa m 1 /2 for a similar set of commercial RMGICs. For the same materials, flexural strength at 24 h ranged from 18 to 34 MPa for the conventional glass-ionomers compared with 49-76 MPa for the RMGICs [40]. These differences are attributable to the presence of the polymerized resin component, which toughens the cement and improves its ability to withstand loading in flexure.…”

Section: Mechanical Properties Of Conventional and Resin-modified Glamentioning

confidence: 97%

“…Despite these variations in reported values in individual papers, there does seem to be an overall consensus that RMGICs are superior to conventional materials in their diametral tensile strength [38,39] and in their flexural strength [39]. In a recent study, the superiority of the toughness and flexural properties was shown to be consistent across a range of brands [40]. For example, the fracture toughness at 24 h of a number of commercial conventional glass-ionomers ranged from 0.18 to 0.30 MPa m 1 /2 compared with 0.49-0.67 MPa m 1 /2 for a similar set of commercial RMGICs.…”

Section: Mechanical Properties Of Conventional and Resin-modified Glamentioning

confidence: 99%

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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: Mechanical Properties Of Conventional and Resin-modified Glamentioning

confidence: 97%

Section: Mechanical Properties Of Conventional and Resin-modified Glamentioning

confidence: 99%

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

2020

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“…RMGIC has greater mechanical resistance and better physical properties, but it has clinical limitations such as decreased biocompatibility [22][23][24] due to the presence of the 2-hydroxyethyl methacrylate (HEMA) monomer, which is considered cytotoxic in contact with the pulp tissue, thus limiting its use in deep cavities. This monomer is capable of inducing apoptosis by increasing oxidative stress induced by an excess of reactive oxygen species, damage to DNA, and suppression of cell proliferation [25].…”

Section: Discussionmentioning

confidence: 99%

“…The porosity of the material is also an important property to be evaluated as it is related to the degree of dissolution and, consequently, to the resistance of the restorative material, which can alter its clinical durability. The increase in porosity also results in increased material roughness and greater adhesion of microorganisms [24].…”

Section: Discussionmentioning

confidence: 99%

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Glass Ionomer Cement Modified by Resin with Incorporation of Nanohydroxyapatite: In Vitro Evaluation of Physical-Biological Properties

Genaro¹,

Anovazzi²,

Hebling³

et al. 2020

Nanomaterials

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Resin-modified glass ionomer cement (RMGIC) has important properties. However, like other restorative materials, it has limitations such as decreased biocompatibility. The incorporation of nanoparticles (NP) in the RMGIC resulted in improvements in some of its properties. The aim of this study was to evaluate the physical-biological properties of RMGIC with the addition of nanohydroxyapatite (HANP). Material and Methods: Vitremer RMGIC was used, incorporating HANP by amalgamator, vortex and manual techniques, totaling ten experimental groups. The distribution and dispersion of the HANP were evaluated qualitatively by field emission scanning electron microscope (SEM-FEG). The evaluation of image porosity (SEM-FEG) with the help of imageJ. Cell viability 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl tetrazoline bromide (MTT) and cell morphology analyses were performed on MDPC-23 odontoblastoid cells at 24 and 72 h. Results: It was possible to observe good dispersion and distribution of HANP in the samples in all experimental groups. The incorporation of 5% HANP into the vortex stirred RMGIC resulted in fewer pores. The increase in the concentration of HANP was directly proportional to the decrease in cytotoxicity. Conclusions: It is concluded that the use of a vortex with the incorporation of 5% HANP is the most appropriate mixing technique when considering the smallest number of pores inside the material. A higher concentration of HANP resulted in better cell viability, suggesting that this association is promising for future studies of new restorative materials.

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Effectiveness of glass ionomer cements in the restorative treatment of radiation-related caries — a systematic review

Dezanetti

Nascimento

Rocha

et al. 2022

Support Care Cancer

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Physical property investigation of contemporary glass ionomer and resin-modified glass ionomer restorative materials

Abstract: As compared to RMGI materials, conventional glass ionomer restorative materials demonstrate more stability in physical properties.

Cited by 38 publications

References 86 publications

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

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

Glass Ionomer Cement Modified by Resin with Incorporation of Nanohydroxyapatite: In Vitro Evaluation of Physical-Biological Properties

Effectiveness of glass ionomer cements in the restorative treatment of radiation-related caries — a systematic review

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