Effect of curing mode on the hardness of dual-cured composite resin core build-up materials

Brazilian Oral Research
Cesar Augusto Galvão ArraisAndre Figueiredo Reis

Abstract

This study evaluated the Knoop Hardness (KHN) values of two dual-cured composite resin core build-up materials and one resin cement exposed to different curing conditions. Two dual-cured core build-up composite resins (LuxaCore-Dual, DMG; and FluoroCore2, Dentsply Caulk), and one dual-cured resin cement (Rely X ARC, 3M ESPE) were used in the present study. The composite materials were placed into a cylindrical matrix (2 mm in height and 3 mm in diameter), and the specimens thus produced were either light-activated for 40 s (Optilux 501, Demetron Kerr) or were allowed to self-cure for 10 min in the dark (n = 5). All specimens were then stored in humidity at 37 degrees C for 24 h in the dark and were subjected to KHN analysis. The results were submitted to 2-way ANOVA and Tukey's post-hoc test at a pre-set alpha of 5%. All the light-activated groups exhibited higher KHN values than the self-cured ones (p = 0.00001), regardless of product. Among the self-cured groups, both composite resin core build-up materials showed higher KHN values than the dual-cured resin cement (p = 0.00001). LuxaCore-Dual exhibited higher KHN values than FluoroCore2 (p = 0.00001) when they were allowed to self-cure, while no significant differences in KHN...Continue Reading

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Citations

May 28, 2014·The Journal of Prosthetic Dentistry·Hong DingXiaoping Luo
Jan 15, 2014·The Journal of Prosthetic Dentistry·Keiichi Yoshida, Xiangfeng Meng
Jun 3, 2016·Dental Materials Journal·Yoshitaka KadowakiHidehiko Sano
Jun 5, 2021·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Wen LienKraig Vandewalle
Aug 11, 2021·Journal of the Mechanical Behavior of Biomedical Materials·M DimitriadiG Eliades

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