Specialist Questions

Category: Instrument Design

Why are Zendo’s Pathfinder files 3% while some others are 2%?

By Dr. Barry H. Korzen | Posted July 11, 2016

As with any instrument its effectiveness is based on a combination of flute design and taper. Hand stainless steel files have a 2% taper and therefore the natural progression for the next instrument would be a 3% taper. Ultimately we want to instrument the canal to a minimum 4% taper therefore combining a 3% taper with an effective flute design speeds up the entire instrumentation process.

Interview with Dr. John T. McSpadden on Instrument Design and Technique Protocol (Part 4)

By Dr. Barry H. Korzen | Posted April 18, 2014

In this, the fourth part of an interview with Dr. John McSpadden, he answers the question “Do you have a preference between rotary and reciprocation, and if so why?”

Interview with Dr. John T. McSpadden on Instrument Design and Technique Protocol (Part 2)

By Dr. Barry H. Korzen | Posted March 25, 2014

In Part 2 of a 4 part interview, John McSpadden suggests measures to reduce the possibility of having a procedural accident during endodontic instrumentation.

Interview with Dr. John T. McSpadden on Instrument Design and Technique Protocol (Part 1)

By Dr. Barry H. Korzen | Posted March 19, 2014

Why is the design of the instrument so important and how does that affect the technique protocol that the clinician ultimately chooses? Dr John T McSpadden answers this most important question in Part 1 of a 4 part interview.