Hybrid Technique on Curves

Around the Curves and Then Some

Clinician: Dr. Nathaniel Behrents, DDS, MS; Fayetteville, AR

Description of the tooth, its position and its root morphology: #15. Buccal inclination with four canals and the apical third curved slightly over 90 degrees to distal.

Diagnosis: Irreversible pulpitis with long roots and greater than 90-degree curvature.

Technique: To navigate a long 90-degree curve, Dr. Behrents took a hybrid approach: ProTaper Universal files, Lexicon C-Files, PathFile files, and PROTAPER NEXT files.

Dr. Behrents used a ProTaper Universal S1 shaping file to begin coronal shaping after achieving patency with a #10 Lexicon C-File. He proceeded through the PathFile sequence, using all three files to length, and followed with the ProTaper Universal S2 to two-thirds length.

Dr. Behrents then began the PROTAPER NEXT sequence using the X1 and X2 to length in the MB1 and DB canals, while maintaining patency with the #10 Lexicon C-File. Because the MB2 joined the MB1 at midroot, it was instrumented with the X1 only.

He instrumented the P canal using the PROTAPER NEXT X2, X3 and X4. The apical segment of the P canal was finished by hand using a 20/08 GT hand file.     


Dr. Nathaniel Behrents grew up in Germantown, TN. He attended the University of Colorado at Boulder and The University of Texas at Dallas where he received a Bachelors of Science in Biology. Nate then returned home to Memphis to attend the University of Tennessee College of Dentistry. He graduated in 2009 earning the Dean's Award for Clinical Excellence and the American Association of Endodontists Student Excellence Award. Nate then attended St. Louis University where he received his Certificate of Endodontics and Masters of Science in Dental Research in June 2011.

Nate is also actively pursuing Diplomate status by the American Board of Endodontics and is a member of the American Dental Association, American Association of Endodontists, American Academy of General Dentistry, the Academy of Osseointegration, Rogers Study Club, and the Academy of Interdisciplinary Dentofacial Therapy.

He and his wife, Dr. Katherine Toole Behrents, are both practicing endodontists and partners in Behrents Endodontic Specialists in Fayetteville, AR.