engleski

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.

dentine ; remineralization ; microhardness ; ion-releasing materials

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