Time required to remove guttacore, thermafil plus, and thermoplasticized gutta-percha from moderately curved root canals with protaper files.

Introduction: A novel carrier-based obturation system, GuttaCore, was developed to facilitate more efficient nonsurgical retreatments. This ex vivo study evaluated the time required for re-treating GuttaCore and 2 other common obturation materials in moderately curved canals with ProTaper retreatment and ProTaper files.

Methods: Sixty mesial roots of mandibular molars with the same mean curvature were randomly divided into 3 experimental groups: warm vertical, Thermafil Plus, and GuttaCore.

Resistance to cyclic fatigue failure of a new endodontic rotary file.

Introduction: A new nickel-titanium (NiTi) rotary file called the ProFile Vortex (PV; Denstply, Tulsa Dental Specialties, Tulsa, OK) has recently been released for endodontic use. The purpose of this study was to compare cyclic fatigue resistance of the new size 30 PV files with size 30 files of other popular brands. Other files tested include Twisted File (TF; Sybron Dental Specialties, Orange, CA), ProFile (PF; Denstply Tulsa Dental Specialties, Tulsa, OK), GTX (GTX, Denstply Tulsa Dental Specialties), and EndoSequence (ES; Brasseler, Savannah, GA).

A comparison of three nickel titanium rotary systems, EndoSequence, ProTaper universal, and profile GT, for canal-cleaning ability.

Canal preparation is a major step in root canal treatment and is directly related to subsequent disinfection and obturation. In recent years, nickel-titanium rotary systems such as the EndoSequence (Brassler USA, Savannah, GA), the ProTaper Universal (Dentsply/Maillefer, Ballagigues, Switzerland), and the ProFile GT (Dentsply/Maillefer, Ballagigues, Switzerland) have significantly altered root canal instrumentation. EndoSequence has become a very popular system among general practitioners but has not been scientifically tested or compared with other rotary systems that are commonly used by both specialists and general practitioners.