Proantosiyanidin’in Dentin Mikrosertliğine ve Biodentin’in Bağlanma Dayanımına Etkisinin Değerlendirilmesi

Abstract

TAVŞAN B. The Effect of Proanthocyanidin on Dentin Microhardness and the Bond Strength of Biodentin. Hacettepe University Faculty of Dentistry, Department of Endodontics, Specialization Thesis, Ankara, 2022. The aim of our study is to examine the effect of Proanthocyanidin (PA), a new irrigation solution, on the dentin microhardness and the bond strength of Biodentin, which is used as a barrier material, in comparison with other irrigation agents. 112 single-canal teeth were decorated, then prepared with the ProTaper file system (F5) and #1-6 Peeso reamers to obtain a standard internal diameter. For the microhardness test, the teeth were divided into 3 experimental (n=30) in which 1.5% NaOCl, 2% CHX and PA (25% GSE) were applied and 1 control (n=10) groups. Two dentin sections of 2 mm thickness were obtained from the coronal of each root. Vickers microhardness test was used to evaluate the effects of solutions for microhardness. For the bond strength test, 3 experimental (n=54) and 1 control (n=18) groups were formed. After the application of the solutions, Ca(OH)2 was placed in all groups. After two weeks, Ca(OH)2 was removed and two dentin sections of 2 mm thickness were obtained from the coronal parts of the roots. Biodentin was placed on dentin sections and bond strength was measured by push-out test. The failure types were categorized. All data were analyzed using repeated measures Analysis of Variance (ANOVA) at p<0.05 significance level. Pairwise comparisons were made using Bonferroni correction. There was no statistically significant difference among the DW, PA and CHX groups in terms of microhardness (p>0.05). Microhardness values in the NaOCl group decreased significantly with all groups (p<0.05. There was a statistically significant difference among the groups in Bond strength evaluation. It was found significantly lower in the PA group than in the NaOCl group (p<0.05). There was no significant difference between CHX and NaOCl, PA groups in terms of bond strength values (p>0.05). Mix failures was observed at a higher rate in all groups. Adhesive failures was most common in the PA group, but there was no significant difference among the other groups (p>0.05). Cohesive failures was most common in the control group, and there was only a significant difference between them and the PA group (p<0.05).