Guest lecturer

Non-surgical endodontic retreatment and minimally invasive instrument retrieval

Theoretical and hands- on course with Dr. Yoshi Terauchi, DDS., PhD in Oslo, Norway - May 28th, 2020

Non-surgical endodontic retreatment and minimally invasive instrument retrieval – Endo Inn

Course summary

[[ (500) | currency:"EUR " ]]
Guest lecturer Dr. Yoshi Terauchi
Suitable for
General practitioners and specialists
40 people (min 25)
Oslo, Norway

For price details, see below

About this course

Initial root canal therapy does not always result in healing for a multitude of reasons. Failure to adequately disinfect the root canal system may result in nonhealing. Bacteria may persist following initial treatment due to areas that were inaccessible to instrumentation and irrigation. Causes of treatment failure may include lack of tooth isolation; inadequate cleaning, shaping, and irrigation; and an incomplete obturation. In addition, iatrogenic accidents such as separated instruments and ledge formation can also be a problem leading to failure because of the inability to disinfect the canal system apical to those obstructions. In retreatment those mishaps that can negatively impact the treatment outcome should be properly managed. Therefore in the theoretical and hands-on course, predictable techniques to best manage those mishaps will be presented and demonstrated. During the workshop the participants will have the opportunity to be trained by the Master Dr. Terauchi on the practice of retreatment and minimally invasive techniques to retrieve separated instruments.

Scientific program - Day 1 (12.30pm - 6.30pm)

The concept of endodontic retreatment

  • Where are the bacteria causing apical periodontitis?
  • Where are the typical places for bacteria to form biofilms?

Removal of gutta-percha root filling materials and biofilms

  • Why do the gutta-percha root fillings have to be removed in retreatment?
  • What is the most efficient technique to remove root fillings?
  • Presentation of the new Terauchi ultrasonic sharpener.


  • Irrigation protocol during retreatment
  • What is the most efficient technique for irrigating the canal?

Management of ledged canals

  • How do you prevent ledge formation?
  • What are the predictable and practical techniques to bypass ledges

MTA obturation in retreatment (Perforation repair)

  • Comparisons of clinical properties and root canal preparation between gutta-pecha and MTA as a root filling material
  • Predictable techniques for MTA obturation

Predictable and minimally invasive instrument retrieval

  • Psychological principles planning instruments retrieval
  • Diagnosis and treatment planning for broken file removal (BFR)
  • Concepts of BFR
  • Two key preparation techniques
  • Two predictable removal techniques
  • Case reports

Live demonstration and hands-on - Day 2 (9.00am - 5.00pm)

  • All the above topics will be live-demonstrated and practiced during the workshop
  • Limited seats to 12 participants

The Japanese Endo Master, Dr. Yoshi Terauchi

Price details and sign up

  • Theoretical lecture - Day 1 (6 hours): 500 Euros
  • Hands-on practice and theoretical lecture - Day 1 and 2 (14 hours): 1700 Euros