Comparison of The Cleaning Ability of K3 and Protaper Rotary Nickel Titanium Systems with Manual Instruments in Permanent teeth (In Vitro Study)

Aims: The aim of present study is to compare the effectiveness of manual K-files and two rotary systems K3 and Protaper for root canal preparation in permanent teeth. Materials and Methods: India ink is injected to forty-five permanent single rooted teeth. The teeth is randomly divided into three experimental groups. In each experimental group, either manual instruments (K-file) or rotary nickel titanium instruments (K3 and Protaper) are used to prepare root canal. After preparing, cleaning of the canals and clearing of teeth, ink removal was evaluated with stereomicroscope (10x magnification). Statistical analysis was done with Kruskal-Wallis and Mann Whitney tests. Results: There were significant differences in cleaning ability between manual and rotary instruments, but, Rotary files performed significantly better cleaning ability in the apical, middle and coronal thirds than manual instruments. No significant differences between two rotary groups (K3 and Protaper) in the apical, middle and coronal thirds of root canals . Conclusions: Manual K-files, (K3and Protaper) rotary systems showed acceptable cleaning ability in permanent root canals, but, Rotary instruments (K3 and Protaper ) reported better cleaning ability than manual one .