Shear bond strength of resin modified glass ionomer to mineral trioxide aggregate with different setting time
김상완, 송민철, 송민주, 조용범,
소속 상세정보
김상완 ( Kim Sang-Wan ) - Dankook University School of Dentistry Department of Conservative Dentistry
송민철 ( Song Min-Cheol ) - Dankook University School of Dentistry Department of Conservative Dentistry
송민주 ( Song Min-Ju ) - Dankook University School of Dentistry Department of Conservative Dentistry
조용범 ( Cho Yong-Bum ) - Dankook University School of Dentistry Department of Conservative Dentistry
KMID : 1035020180190010010
Abstract
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)
키워드
mineral trioxide aggregate; resin modified glass ionomer; shear bond strength
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