Akademik Veri Yönetim Sistemi
European Journal of Research in Dentistry, cilt.4, sa.1, ss.25-30, 2020 (Hakemli Dergi)
Aim: Evaluating the relation between wear resistance and microhardness of composite blocks, hybrid block and resin composite to provide convenient argument for clinical application. Methods: A conventional resin composite (IPS Empress Direct, Ivoclar Vivadent, Liechtenstein), a hybrid ceramic block (Enamic, Vita, Germany) and composite blocks (Lava Ultimate, 3M, USA; Hc block, Shofu, Japan; Brilliant Crios, Coltene, Switzerland; Cerasmart, GC Corp., Japan) were investigated. Specimens (n=12 for each) were loaded in chewing simulator (Dent Ar-Ge, Analitik Medical, Turkey) for thermal cycling (49 N force, 240.000 cycles, 1.5mm lateral movement, 1.7Hz frequency). Specimens were scanned with Las-20 (Laser scanner, SD-Mechatronic, Germany) and Vickers microhardness (VHN) values were determined (200 grf/10 s). Statistical analysis was performed using Spearman Correlation Coefficient, Kolmogorov–Smirnov, Mann-Whitney U, Friedman and Kruskal-Wallis tests (p<0.05). Results:Significant correlation was determined between microhardness and wear resistance for all composite Cad/Cam blocks (p<0.001), whereas no correlation for hybrid block and resin composite material (p≥0.05). Vita Enamic showed the highest VHN value and wear resistance among all the materials (p<0.001). Conclusion: Within the limitations of this in vitro study, a significant correlation between microhardness and wear resistance was only observed for composite Cad/Cam blocks and varied among the brands.