Comparison of canal transportation and centering ability of hand Protaper files and rotary Protaper files by using micro computed tomography

Resumo

Introduction and objective: The aim of the present study was
to compare root canal preparation with rotary ProTaper files and
hand ProTaper files to find a better instrumentation technique for
maintaining root canal geometry with the aid of computed tomography.
Material and methods: Twenty curved root canals with at least 10
degree of curvature were divided into 2 groups of 10 teeth each. In
group I the canals were prepared with hand ProTaper files and in
group II the canals were prepared with rotary ProTaper files. Image
analysis was performed at four levels 4mm, 6mm, 9mm, and 12mm
from the root apex to assess changes in canal transportation and
centering ratio using computed tomography (CT). Results: Data
suggest that rotary ProTaper files presented the best outcomes
for both variables evaluated. Rotary ProTaper files caused lesser
transportation and remained better centered in the canal than hand
ProTaper files. Conclusion: The canal preparation in natural teeth
with rotary Protaper files showed lesser transportation and better
centering ration than hand ProTaper files.