The Study of Tensile Bond Strength between Non-Reinforced and Reinforced Alumina Filler with Different Amount in Denture Base
Objectives: The purpose of this study was to study of tensile bond strength between non-reinforced and reinforced alumina filler with different amount in acrylic denture base.
Methods: The 3, 5, 10 and 15 wt% of nonsilanized and silanized alumina filler were mixed with heat-polymerized PMMA. PMMA without reinforced alumina was served as control. The EDS analysis was used to detect silicon (Si) on the surface of alumina filler. All of 9 groups were packed with acrylic denture base and prepared in dumbbell-shaped specimens (n=10). The tensile bond strength test was performed using a universal testing machine. The mean tensile bond strength was determined and analyzed by 2 way-ANOVA and Duncan’s test. (p<0.05)
Results: The EDS analysis showed the deposition of silicon element on the surface of alumina filler. The 3 wt% of silanized alumina filler group showed the highest mean tensile bond strengths. From statistical analysis, the mean tensile bond strengths of 3, 5 and 10 wt% groups were significantly higher than those of the other groups (p<0.05). The fracture mode of specimens was almost adhesive failure. From SEM analysis, gaps between silanized alumina fillers and resin matrix were not observed.
Conclusions: The mean tensile bond strengths of 3, 5 and 10 wt% groups were significantly higher than those of the other groups (p<0.05).
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