Cover Image

Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis

Objectives: This study determined the effects of self-adhesive resin coatings on viscoelastic properties of highly viscous glass ionomer cements (HVGICs) using dynamic mechanical analysis. Materials and Methods: The HVGICs evaluated were Zirconomer [ZR] (Shofu), Equia Forte [EQ] (GC) and Riva [RV] (...

Full description

Saved in:
Bibliographic Details
Main Authors: Yap, Adrian U-Jin, Ong, J.E., Yahya, Noor Azlin
Format: Article
Published: Elsevier 2021
Subjects:
RK Dentistry
Online Access:http://eprints.um.edu.my/25910/
https://doi.org/10.1016/j.jmbbm.2020.104120
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.eprints.25910
record_format eprints
spelling my.um.eprints.259102021-04-30T02:01:48Z http://eprints.um.edu.my/25910/ Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis Yap, Adrian U-Jin Ong, J.E. Yahya, Noor Azlin RK Dentistry Objectives: This study determined the effects of self-adhesive resin coatings on viscoelastic properties of highly viscous glass ionomer cements (HVGICs) using dynamic mechanical analysis. Materials and Methods: The HVGICs evaluated were Zirconomer [ZR] (Shofu), Equia Forte [EQ] (GC) and Riva [RV] (SDI). Sixty specimens (12mm x 2mm x 2mm) of each material were fabricated using customized Teflon molds. After initial set, the specimens were removed from their molds, finished, measured and randomly divided into 3 groups of 20. Half the specimens in each group were left uncoated while the remaining half was covered with the respective manufacturers’ resin coating. The specimens were subsequently conditioned in distilled water, artificial saliva or citric acid at 37°C for 7 days. The uncoated and coated specimens (n=10) were then subjected to dynamic mechanical testing in flexure mode at 37°C with a frequency of 0.1 to 10Hz. Storage modulus, loss modulus and loss tangent data were subjected to normality testing and statistical analysis using one-way ANOVA/Scheffe's post-hoc test and Ttest at significance level p<0.05. Results: Mean storage modulus ranged from 1.39 ± 0.36 to 10.80 ± 0.86 GPa while mean loss modulus varied from 0.13 ± 0.03 to 0.70 ± 0.14 GPa after conditioning in the different mediums. Values for loss tangent ranged from 39.4 ± 7.75 to 213.2 ± 20.11 (x10 -3 ). Significant differences in visco-elastic properties were observed between mediums and materials. When conditioned in distilled water and artificial saliva,storage modulus was significantly improved when ZR, EQ and RV were uncoated. Significantly higher values were, however, observed with resin coating when the materials were exposed to citric acid. Conclusion: The visco-elastic properties of HVGICs were influenced by both resin coating and chemical environment © 2020 Elsevier Ltd Elsevier 2021 Article PeerReviewed Yap, Adrian U-Jin and Ong, J.E. and Yahya, Noor Azlin (2021) Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis. Journal of the Mechanical Behavior of Biomedical Materials, 113. p. 104120. ISSN 1751-6161 https://doi.org/10.1016/j.jmbbm.2020.104120 doi:10.1016/j.jmbbm.2020.104120
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic RK Dentistry
spellingShingle RK Dentistry
Yap, Adrian U-Jin
Ong, J.E.
Yahya, Noor Azlin
Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
description Objectives: This study determined the effects of self-adhesive resin coatings on viscoelastic properties of highly viscous glass ionomer cements (HVGICs) using dynamic mechanical analysis. Materials and Methods: The HVGICs evaluated were Zirconomer [ZR] (Shofu), Equia Forte [EQ] (GC) and Riva [RV] (SDI). Sixty specimens (12mm x 2mm x 2mm) of each material were fabricated using customized Teflon molds. After initial set, the specimens were removed from their molds, finished, measured and randomly divided into 3 groups of 20. Half the specimens in each group were left uncoated while the remaining half was covered with the respective manufacturers’ resin coating. The specimens were subsequently conditioned in distilled water, artificial saliva or citric acid at 37°C for 7 days. The uncoated and coated specimens (n=10) were then subjected to dynamic mechanical testing in flexure mode at 37°C with a frequency of 0.1 to 10Hz. Storage modulus, loss modulus and loss tangent data were subjected to normality testing and statistical analysis using one-way ANOVA/Scheffe's post-hoc test and Ttest at significance level p<0.05. Results: Mean storage modulus ranged from 1.39 ± 0.36 to 10.80 ± 0.86 GPa while mean loss modulus varied from 0.13 ± 0.03 to 0.70 ± 0.14 GPa after conditioning in the different mediums. Values for loss tangent ranged from 39.4 ± 7.75 to 213.2 ± 20.11 (x10 -3 ). Significant differences in visco-elastic properties were observed between mediums and materials. When conditioned in distilled water and artificial saliva,storage modulus was significantly improved when ZR, EQ and RV were uncoated. Significantly higher values were, however, observed with resin coating when the materials were exposed to citric acid. Conclusion: The visco-elastic properties of HVGICs were influenced by both resin coating and chemical environment © 2020 Elsevier Ltd
format Article
author Yap, Adrian U-Jin
Ong, J.E.
Yahya, Noor Azlin
author_facet Yap, Adrian U-Jin
Ong, J.E.
Yahya, Noor Azlin
author_sort Yap, Adrian U-Jin
title Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
title_short Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
title_full Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
title_fullStr Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
title_full_unstemmed Effect of resin coating on highly viscous glass ionomer cements: A dynamic analysis
title_sort effect of resin coating on highly viscous glass ionomer cements: a dynamic analysis
publisher Elsevier
publishDate 2021
url http://eprints.um.edu.my/25910/
https://doi.org/10.1016/j.jmbbm.2020.104120
_version_ 1698697323571314688
score 13.211869

Similar Items