as feedback from leading clinicians in the field of endodontics. The files incorporate a unique straight flute design
and manufacturing process that eliminates the traditional helical flutes found on virtually all rotary endodontic files.
The result is that Liberator files will not self-thread into a canal. Self-threading is a major contributor to file
separation.
The Liberator file provides a level of safety and control that is unprecedented in rotary nickel-titanium files
The patented design of the non-cutting Roane tip minimizes ledging
and transportation while helping to keep Liberator files centered in the
canal.
Liberator files are designed with straight flutes that will not self-thread,
unlike helically-fluted files. As proof, a controlled study measured the
incidence of self-threading of the Liberator compared to competitive
rotary files as shown here.
The triangular cross section and lack of radial lands provide sharp cutting edges and reduce torque demand on Liberator files. Because the
files operate at high RPM (1,000-2000) compared to conventional files (300-500),
torque is further reduced according to this basic rule of physics:
Torque = Work x 5252/RPM
A vortex created by the high rotational speed effectively removes debris.
Liberator files rotating at 1,000-2,000 rpm cut dentin faster than conventional rotary files at 300 rpm. This
higher speed also provides excellent tactile feel in canals. Plus, torque control is not required for electric
motors. And even air-driven handpieces may be used at 1,000 to 2,000 rpm.
The manufacturing process for most conventional helical files leaves
micro-cracks that are perpendicular to the file axis. These cracks
have been shown to contribute to file separation. A unique
manufacturing process for Liberator files eliminates these
perpendicular micro-cracks. The process also reduces surface
hardening caused by elevated temperatures.
Because Liberator files do not self-thread, gutta percha points, Resilon*
and other obturation materials are easily removed.
