PERBEDAAN BAHAN IRIGASI AKHIR SALURAN AKAR TERHADAP KEKUATAN PELEKATAN PUSH-OUT BAHAN PENGISI SALURAN AKAR BERBAHAN DASAR RESIN PADA DINDING SALURAN AKAR

Abstract

Final irrigation is an important factor for adhesion between resin based sealer and root root canal wall. The aim of this study was to evaluate the differences of final irrigant solutions namely 17% EDTA, and 17% EDTA followed by 2% chlorhexidine
on push-out bond strength of epoxy sealer and gutta-percha as well as methacrylate sealer and resilon against root canal wall.
Twenty eight extracted human mandibular premolars were used in this study.  The crowns were cut on cervical region to obtain root length of 14 mm, then the root canals were prepared using crown down technique to apical size # 40/0,04. These
specimens were randomly divided into four groups of 7 each teeth. Group IA and IB were irrigated with 17% EDTA, group IIA and IIB were irrigated with 17% EDTA followed by 2% chlorhexidine. The root canals were obturated with epoxy sealer and guttapercha in group IA and IIA. In group I B and II B were obturated with methacrylate sealer and resilon, and then were incubated for 7 days. The specimens were horizontally sectioned into 2mm thick slice, followed by push out test using universal testing machine. All specimens were then observed under a stereo microscope (magnification of 40X) to determine the adherence failure between root
canal fillings and dentinal walls. Data were analyzed with a two-way ANOVA at 95% confidence level (α=0,05).
A two way ANOVA test showed that push-out bond strength between final irrigant solution of 17% EDTA, and 17% EDTA followed by 2% chlorhexidine were not different (p>0.05). Epoxy sealer and guttapercha produced significantly higher push-out bond strength than methacrylate sealer and resilon (p<0.05), however no interaction occurred between final irrigants and root canal fillings (p>0.05). The failure patterns were dominantly cohesive at the epoxy sealer and gutta percha, whereas adhesive failure at the methacrylate sealer and resilon.
It can be concluded that push-out bond strength using final irrigant of 17% EDTA were not different with 17% EDTA followed by 2% chlorhexidine, while epoxy sealer and guttapercha had higher push-out bond strength than methacrylate sealer and resilon.