Investigation of nanohardness values of dual-cure, bulk-fill composite resins at different time intervals
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Tarih
2021
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Aim: The aim of this study was to evaluate the surface hardness of dualcure, bulk-fill composite resins at different depths and time intervals using\rnanoindentation.\rMethodology: In the study, a comparison was conducted of the\rnanohardness values of Fill-Up, HyperFIL, and Cention N dual-cure, bulkfill composite resins in the experimental group and Reveal HD, a lightcured, bulk-fill composite, in the control group. The dual-cure, bulk-fill\rcomposites used in the experimental group were divided into two\rsubgroups. The first group was polymerized with an LED light source, and\rthe second group was chemically polymerized in line with the\rmanufacturer's instructions. The dual-cure composite resins were prepared\rin two different depths, 5 mm and 10 mm. In the control group, specimens\rwith a depth of 5 mm were prepared, and their polymerization was\rprovided by an LED light source. The nanohardness values of the lower and\rupper surfaces of the samples were measured using the Hysitron TI 950\rTriboindenter 24 hrs and 7 days after polymerization.\rResults: Following statistical evaluations, no statistically significant\rdifference was found between the nanohardness values measured 24 hrs\rand 7 days after light or chemical polymerization of the dual-cured, bulkfill composite resins. It was observed that light polymerization of HyperFIL\rand Fill-Up dual-cure, bulk-fill composite resins had no effect on\rnanohardness values. When Cention N dual-cure, bulk-fill composite resin\rwas polymerized with a light source, higher values of nanohardness were\robtained.\rConclusion: It was determined that the investigated dual-cure, bulk-fill\rcomposites reached their final hardness after 24 hrs. In all groups, it was\robserved that the highest nanohardness values belonged to Cention N for\rboth polymerization methods.
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Kaynak
International Dental Research
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Scopus Q Değeri
Cilt
11
Sayı
Supplement 1
