The Specialist

Specialist Questions: Latest

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.

Should there be a concern for patients who are to undergo a MRI scan and who have a separated file near the apex embedded in gutta percha? Assume the file is magnetically attracted.

By Dr. Barry H. Korzen | Posted February 5, 2015

As careful as we are, instrument separation occurs and the consequences have to be dealt with. When the instrument fragment cannot be removed we have both a legal and moral obligation to inform the patient. Not only for the impact this may have on the prognosis of the endodontic treatment, but also on any other medical implications that might surface in the future.

The use of rubber dam during endodontic treatment has been deemed a necessity. But is there scientific evidence to back this up?

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

The use of rubber dam during endodontic treatment has been deemed a necessity. But is there scientific evidence to back this up?

In treating an open apex do you prefer Calcium Hydroxide or MTA?

By Dr. Barry H. Korzen | Posted October 14, 2014

I read a study about using the MTA for treating open apices after using Calcium Hydroxide (CH) on the first visit. It used to be to just use CH. So doing an apical plug does sound good but I thought apical closure happened without it? Maybe the treatment time is much shorter and the results might be better, but what is your opinion?

For Direct Pulp Capping, do you recommend using MTA or Calcium Hydroxide?

By Dr. Barry H. Korzen | Posted October 7, 2014

Even though Calcium Hydroxide (CH) has historically been the pulp capping agent of choice, in an excellent paper published on the Journal of Endodontics’ website on September 14, 2014 Mente et al addresses this question. Their paper reports on a controlled, historic cohort study project where potential prognostic factors were evaluated.

When bleaching vital teeth should desensitizing agents be used prophylactically and if so which one is preferred?

By Dr. Barry H. Korzen | Posted August 31, 2014

The bleaching of teeth with vital pulps is a commonly accepted procedure but is often associated with tooth sensitivity as well as changes to the mineralization of the tooth and the efficacy of bonding procedures.

How successful is endodontic surgery?

By Dr. Barry H. Korzen | Posted August 8, 2014

With all the advertising being done by implant companies directed at our patients, it is becoming more difficult to convince them to undergo endodontic surgery when initial orthograde treatment fails and retreatment is impossible or impractical. What evidence-based material can I use to balance the information they are reading in their magazines?

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