IADR Abstract Archives
Effect of Ion-Releasing Materials on Dentine Surface Microhardness and Appearance
Objectives: The aim of this study was to determine the effect of ion-releasing materials on dentine microhardness and surface appearance.
Methods: Five materials were tested; glass ionomer cement (GC Fuji TRIAGE®), two glass hybrid cements (EQUIA Forte®HT, Riva SC), calcium silicate-based cement (Biodentine®) and an alkasite (Cention®Forte). For the control group, conventional resin composite (3M™ Filtek™ Universal) was used. A class-I cavity (3×1.5mm wide, 0.5mm deep) was made on the exposed occlusal surfaces of 60 extracted human third molars which were then demineralized by immersing them in a prepared solution (pH 5.0, 37°C) for 2 weeks, followed by placing them in saline for 2 and 4 weeks respectively. The teeth were then cut with a diamond saw perpendicular to the joint of material and demineralized surface, obtaining 10 samples for each group (n=10). Microhardness was determined by the Vickers method in triplicate. The results were analysed using SPSS statistical software and compared using analysis of variance and appropriate post-hoc tests for comparison. The statistical significance level was set to 0.05.
Results: Mean microhardness values (HV0,1) obtained after 14 days were significantly different between most groups (p<0.001), with several exceptions (Biodentine® vs. Cention® Forte p = 0.08, Biodentine® vs. Riva SC p = 0.997, Riva SC vs. Cention® Forte p = 0.229). Similarly, after 28 days there were statistically significant differences between all groups (p<0.001), except EQUIA Forte®HT and GC Fuji TRIAGE® (p = 0.514) and Cention®Forte and Riva Self Cure (p = 0.687). All tested materials lead to increase in microhardness; the highest values were obtained for EQUIA Forte®HT. SEM analysis showed uneven patterns, material deposits and debris on the examined surfaces.
Conclusions: All tested materials lead to certain mineral gain and significantly affected the appearance of dentine surface. EQUIA Forte®HT and GC Fuji TRIAGE® caused the biggest increase in microhardness.
Methods: Five materials were tested; glass ionomer cement (GC Fuji TRIAGE®), two glass hybrid cements (EQUIA Forte®HT, Riva SC), calcium silicate-based cement (Biodentine®) and an alkasite (Cention®Forte). For the control group, conventional resin composite (3M™ Filtek™ Universal) was used. A class-I cavity (3×1.5mm wide, 0.5mm deep) was made on the exposed occlusal surfaces of 60 extracted human third molars which were then demineralized by immersing them in a prepared solution (pH 5.0, 37°C) for 2 weeks, followed by placing them in saline for 2 and 4 weeks respectively. The teeth were then cut with a diamond saw perpendicular to the joint of material and demineralized surface, obtaining 10 samples for each group (n=10). Microhardness was determined by the Vickers method in triplicate. The results were analysed using SPSS statistical software and compared using analysis of variance and appropriate post-hoc tests for comparison. The statistical significance level was set to 0.05.
Results: Mean microhardness values (HV0,1) obtained after 14 days were significantly different between most groups (p<0.001), with several exceptions (Biodentine® vs. Cention® Forte p = 0.08, Biodentine® vs. Riva SC p = 0.997, Riva SC vs. Cention® Forte p = 0.229). Similarly, after 28 days there were statistically significant differences between all groups (p<0.001), except EQUIA Forte®HT and GC Fuji TRIAGE® (p = 0.514) and Cention®Forte and Riva Self Cure (p = 0.687). All tested materials lead to increase in microhardness; the highest values were obtained for EQUIA Forte®HT. SEM analysis showed uneven patterns, material deposits and debris on the examined surfaces.
Conclusions: All tested materials lead to certain mineral gain and significantly affected the appearance of dentine surface. EQUIA Forte®HT and GC Fuji TRIAGE® caused the biggest increase in microhardness.