Shaping ability of the profile 25/0.06 and protaper F2 in rotary motion, and reciproc in simulated canals.

Background: Since the introduction of nickel-titanium (Ni-Ti) instruments to dentistry, a wide variety of Ni-Ti instruments have become commercially available. These Ni-Ti instruments are expensive, which limits their usage in developing countries and forces practitioners to use instruments repeatedly. Another problem is the possible prion cross-contamination associated with the multiple usage of endodontic instruments.

Comparative investigation of 2 rotary nickel-titanium instruments: protaper universal versus protaper.

Objective: The objective of this study was to evaluate whether the changes in the design of the ProTaper canal instruments contribute to the shaping ability of the instrument in terms of the morphology of curved canals measured by the cross-sectional area using the Bramante method.

Study Design: Ten extracted human mandibular molars with root canal curvatures between 25 degrees and 41 degrees were used. Ten mesiobuccal canals were instrumented with ProTaper and 10 mesiolingual canals were instrumented with ProTaper Universal rotary instruments.