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KMID : 1035020180190010010
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Endodontics and Dental Rehabilitation
2018 Volume.19 No. 1 p.10 ~ p.15
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Shear bond strength of resin modified glass ionomer to mineral trioxide aggregate with different setting time
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Kim Sang-Wan
Song Min-Cheol
Song Min-Ju
Cho Yong-Bum
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Abstract
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Objective: Studies on the interaction between Mineral Trioxide Aggregates (MTA) and resin modified glass ionomer (RMGI) are quite rare. The purpose of this study was evaluated the shear bond strength between MTA and RMGI.
Materials and Methods: Sixty specimens of MTA were fabricated with cylinder shaped acrylic molds and the specimens were randomly classified to 6 groups with 10 specimens each. The specimens were stored at 37℃, 100% humidity. The setting time of MTA and storage time of RMGI-MTA were as follows; G1: 45 min/ 24 hours, G2: 45 min/ 7 days, G3: 24 hours/ 24 hours, G4: 24 hours/ 7 days, G5: 72 hours/ 24 hours, G6: 72 hours/ 7 days. Shear bond strength was measured with Universal testing machine. To compare the difference of mean values among the groups, one-way ANOVA and Tukey HSD post hoc test were performed with a significance level of 0.05.
Results: Compared to the group 1 and 2, other four groups resulted in significantly improved shear bond strength (p < .05). There was no significant difference between group 1 and 2.
Conclusion: It can be recommended to apply RMGI after complete setting of MTA in order to achieve better bond strength between MTA and RMGI. (Endod Dent Rehabil 2018;19(1):10-15)
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KEYWORD
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mineral trioxide aggregate, resin modified glass ionomer, shear bond strength
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