Shaping Ability and Canal Cleanliness of Different Rotary Nickel Titanium Systems.

Abstract

Over the decades, evolutional changes have been introduced for the Ni-Ti rotary files to facilitate the shaping and cleaning ability for the curved canals; these changes have included the design and the alloy itself. TFAdaptive is considered to be one of these recently introduced files that have unique features of being with R-phase technology, adaptive motion. This study aimed to evaluate the effect of the Twisted File Adaptive and ProTaper Next and Twisted File rotary Ni-Ti files regarding the shaping ability via assessment of canal centering ability and canal curvature as well as its cleaning efficiency via assessment of the percentage of surface area covered with debris. The percentage of change in canal curvature, the Mesiodistal transportation and centering ability were assessed by comparing pre- and post- instrumentation measurements taken on CBCT images, while the canal cleanliness was evaluated using the stereomicroscope. Sixty human permanent mandibular molars were used in this study. Access cavities were done; then special measures were taken to ensure standardization and reproducibility of CBCT images.