Canal-centring ability of three rotary file systems in simulated curved canals: a comparative study.

Objective: To compare the canal-centring ability of M two , ProFile and RaCe rotary files, in simulated curved canals.

Materials And Methods: About 30 simulated canals were prepared by M two , ProFile and RaCe rotary files. Pre and post-operative pictures were super-imposed and transportations recorded.