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Objectives The aim of this study was to compare canal aberrations and transportation of Endowave and K3 rotary nickel-titanium files in simulated canals with 40-degree curvature.  Materials and Methods Twenty simulated canals with 40-degree curvature were divided into two groups (each of 10). In one group, canals were instrumented with Endowave and in the other group with K3. Both systems were used in crown-down manner, and canals were prepared till apical size # 25/0.06 taper. The pre- and post-instrumentation radiographic scanned images were superimposed on each other using software movements and viewed for canal aberrations and transportation. Results are statistically analyzed using Student's t-test.  Results In the canals prepared with Endowave files, one (10%) ledge was created whereas in the canals prepared with K3 files, one (10%) apical zip and elbow, one (10%) ledge, and two (20%) perforations were created. When two groups were compared, results were statistically insignificant (p &gt; 0.05) for the amount of resin removed from inner and outer aspect of the canal.  Conclusions Endowave files revealed better results in terms of the canal aberrations compared to K3 files. The direction of transportation was generally toward the outer aspect with both files.

Comparison of the Shaping Ability of Endowave and K3 Rotary Nickel-Titanium Instruments in Simulated Canals