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Title: Effect of resin modified glass ionomer cement on microhardness of initial caries lesions
Authors: Woranun Prapansilp
Kadkao Vongsavan
Praphasri Rirattanapong
Rudee Surarit
Mahidol University
Keywords: Medicine
Issue Date: 1-Jan-2018
Citation: Southeast Asian Journal of Tropical Medicine and Public Health. Vol.49, No.1 (2018), 155-159
Abstract: © 2018, SEAMEO TROPMED Network. All rights reserved. Resin modified glass ionomer cement (GIC) can inhibit caries lesion formation directly adjacent to the application site but there are few studies examining the remineralization effects of resin modified GIC at other sites more remote from the application site. We conducted an in vitro study to evaluate the distance at which resin modified GIC is able to exert a remineralization effect on initial caries lesions from the application site. We immersed 60 bovine incisors for 24 hours in lactic acid to create artificial initial caries lesions. These teeth were then randomly divided into 2 groups of 30 teeth per group: Group 1 received no treatment (control group); in Group 2 resin-modified GIC was applied on the labial surface of the tooth. The teeth were then tested for microhardness at distances of 0.5, 1, 2 and 3 mm from where the resin modified GIC was applied. Microhardness was tested in all teeth at baseline, after initial caries lesion formation and after treatment. The mean microhardness at each site at each testing was compared using the one-way analysis of variance (ANOVA) and Tukey comparison tests. Significance was set at p<0.05. After treatment, there was no significant change in microhardness value at any site tested in the control group (p=0.994). However, in the resin modified GIC group after treatment, all sites tester increased significantly in microhardness (p<0.05) and were significantly greater in microhardness than the control group (p<0.05). In the resin modified GIC group, the mean microhardness values at 0.5 and 1 mm from the resin modified application site higher than at 2 and 3 mm (p<0.05). The mean microhardness values were not significantly different in the treatment group between 0.5 mm and 1 mm and between 2 mm and 3 mm from the application site (p>0.05). In this in vitro study, resin-modified GIC provided a remineralization effect on initial caries lesions up to 3 mm from the application site but had its greatest benefit within 1 mm from the application site.
ISSN: 01251562
Appears in Collections:Scopus 2018

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