in vitro study to evaluate the quality of root canal filling of [MTA] and [PC]

ABSTRACT

The quality of root canal filling is considered the key of the successful endodontic treatment, because the one of goals of root canal obturation is to obtain three-dimensional and complete sealing. Therefore, The aim of this in vitro study was to evaluate the quality of root canal filling of White-colored Mineral Trioxide Aggregate [WMTA] and Gray-colored Portland Cement [GPC]. The sample of study consisted of seventy five recently extracted, single-rooted, permanent human teeth. The root canals were prepared using Crown-Down technique, then the sample was randomly divided into 5 equal groups of 15 teeth each, according to the root canal filling material used [Groupl [WMTA] lonely, Group2 [GPC] lonely, Group3 [Gutta-percha points + WMTA], Group4 [Gutta-percha points + GPC], GroupS [Gutta-percha points + AH26]]. After root canal filling, the temporary coronal restorative material [Coltosol F] was placed, and the teeth were stored in [100% humidity at 37°C] for 7 days. Then, it were cleared and examined by a stereomicroscope [20X magnification] to evaluate the presence of the filling cement in the apical, middle, and coronal thirds of the root canal. Kruskal-Wallis and Mann-Whitney U tests were used, it showed that [GPC] lonely achieves the best quality of root canal filling in the middle thirds, whereas, it was the worst material in the apical thirds. There were no statistically significant differences among the five groups of used materials in the coronal thirds. In the root canal filling [WMTA] lonely, [Gutta-percha points + WMTA], [Gutta-percha points + GPC], and [Gutta-percha points + AH26] can be used, but [GPC] lonely can not be used