Abstract
Objectives: The aim of this study was to evaluate the sealing ability of lateral compaction and tapered single cone gutta-percha techniques in root canals prepared with stainless steel and rotary nickel titanium root canal instruments by fluid filtration method. Study design: The root canals were prepared with stainless steel (SS) and nickel titanium (NiTi) instruments. The canals prepared with SS were obturated with lateral compaction technique using .02 tapered cones and the canals prepared with NiTi instruments were obturated with lateral compaction technique using .02 tapered cones or 06 tapered single cones. The amount of leakage was evaluated by fluid filtration model. The results were statistically analyzed with one-way ANOVA. Results: The group prepared with NiTi instruments and filled with lateral compaction technique showed significantly less coronal leakage than the group prepared with SS instruments and filled with lateral compaction technique (p<0.05). There was no statistically difference between apical leakages of groups (p>0.05). Conclusions: Obturation with lateral compaction of gutta-percha provides a superior coronal seal whilst canal instrumentation with engine-driven NiTi files reduces the extent of microleakage in root canals when compared with stainless steel hand instruments. Tapered single cone technique was comparable with lateral compaction technique because of easier application. Key words:Apical leakage, coronal leakage, lateral compaction technique, single cone technique.
Highlights
Instrumentation and obturation techniques are both key parts of a successful root canal treatment [1]
According to the results of this study, in terms of the coronal leakage; the groups instrumented with nickel titanium (NiTi) instruments and filled with lateral compaction technique yielded statistically significant less leakage than the group instrumented with stainless steel instruments and filled with .02 tapered gutta-percha cones
It is generally believed that the NiTi instruments perform better even in curved canals and produce better cleaning especially in the apical region as compared with the stainless steel instruments
Summary
Instrumentation and obturation techniques are both key parts of a successful root canal treatment [1]. The use of a master cone with a larger taper increases the amount of gutta-percha within the canal, thereby reducing the amount of sealer between accessory cones, which is a desired condition to improve the three-dimensional filling of the canal [2]. Gordon et al [7] reported that the time of obturation for LC was significantly greater than single cone technique Nowadays, it is well-known that the coronal and apical leakages have important adversary effects on the long term success of endodontic treatment [8,9]. The aim of this study was to evaluate the apical and coronal leakage of the canals prepared with stainless steel or nickel-titanium root canal instruments and filled with lateral compaction or tapered single cone techniques of cold gutta-percha
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