Author/Authors :
DENİZ ARISU, Hacer Gazi Üniversitesi - Diş Hekimliği Fakültesi - Diş Hastalıkları ve Tedavisi Anabilim Dalı, Turkey , HELVACIOĞLU KIVANÇ, Bağdagül Gazi Üniversitesi - Diş Hekimliği Fakültesi - Diş Hastalıkları ve Tedavisi Anabilim Dalı, Turkey , OKAY, Tufan Can Gazi Üniversitesi - Diş Hekimliği Fakültesi - Diş Hastalıkları ve Tedavisi Anabilim Dalı, Turkey , ÜÇTAŞLI, Mine Betül Gazi Üniversitesi - Diş Hekimliği Fakültesi - Diş Hastalıkları ve Tedavisi Anabilim Dalı, Turkey , GÖRGÜL, Güliz Gazi Üniversitesi - Dis Hekimliği Fakültesi - Diş Hastalıkları ve Tedavisi Anabilim Dalı, Turkey
Abstract :
Objective: The aim of the study was to evaluate the effect of one bleaching agent (By White) and two bleaching activating systems (LED and diode laser) on the surface hardness of two resin restorative materials (Clearfil APX, Clearfil Majesty Esthetic). Material and Method: A total of 20 disc shaped specimens (2 mm thickness, 5 mm diameter) were prepared for each restorative material. Each restorativematerial group was subdivided into 2 subgroups (n=10) according to the bleaching activating systems. Themicrohardness of the prepared specimens was measured with Vickers tester. For each specimen 3 different indentations were made and they were averaged to determine the initial hardness values of the specimens. Then the specimens were treated with the bleaching agent and this agent was activated with either LED or diode laser for 20 seconds.After the bleaching application,microhardnessmeasurements of the specimens were done again. The results were then analysed by one-wayANOVA. Comparison between the microhardness measurements of initial and post treatment were made withWilcoxon test. Results: A significant difference was observed between resin restorative materials’ surface microhardness values before and after bleaching procedure (p=0.000). There were no significant differences in microhardness between the two bleaching activating systems for each material (p 0.05).Wilcoxon signed rank test showed that there was no significant difference among the baseline and post treatment microhardness values of restorative materials (p 0.05). Conclusion: The bleaching agent which was used with LED and diode laser bleaching activating systems did not affect the microhardness of resin restorative materials.
NaturalLanguageKeyword :
Bleaching agents , tooth whitening , diode laser , microhardness
