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KMID : 1004520130290040359
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Journal of Dental Rehabilitation and Applied Science
2013 Volume.29 No. 4 p.359 ~ p.365
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Effect of Provisional Restorative and Filling Materials on Bond Strength of Adhesive Resin Cement between Lithium Disilicate Glass-Ceramic and Dentin
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Oh Sang-Chun
Sim Hun-Bo
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Abstract
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The aim of this study was to evaluate the effect of temporary restorative and filling material on bonding strength between lithium disilicate glass-ceramic and dentin. 60 extracted human molars were cross- sectioned at occlusal third and were embedded into self-cure acrylic resin. Then the teeth were randomly divided into four groups of 15 each. Lithium disilicate glass-ceramic is cemented to dentin as follows: after no any application of the provisional materials (Group A), after application of ALIKETM (GC America Inc.)(Group B), after application of Luxatemp?? Automix plus (DMG, Germany)(Group C), after application of Fermit?? (Ivoclar Vivadent, Leichtenstein)(Group D). After the specimens were stored in distilled water for 24 hours, the shear bond strength of the specimens were measured using UTM (Zwick 1456 41, Zwick, Germany) at a crosshead speed of 1mm/min. The data were analysed by one-way ANOVA and Tukey HSD tests. There were no statistically significant differences of bond strength among the groups. Fracture type was showed mixed type of adhesive and cohesive fracture in most of specimens. Within the limitation of this study, bond strength of adhesive resin cement between lithium disilicate glass-ceramic and dentin was not affected by provisional restorative and filling aterials.
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KEYWORD
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Lithium disilicate glass-ceramic, Dentin, Bonding strength, Temporary restorative and filling material
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