Root canal disinfection during retreatments: a cordless revolution
Fig. 1

A preliminary research has been conducted using Micro–computed tomographic (micro-CT) imaging that is a nondestructive research tool that enables the 3-dimensional identification of the root canal system. Those two teeth were treated with a conventional tecnique,obturated with sealer and warm guttaperca and retreated giving the same shape that has been reached during first treatment.

Root canal disinfection during retreatments: a cordless revolution
Fig. 2

Many remnants can be observed in the second 3d reconstraction,but after only 20 second of PUI activation many debris of GP and sealer were removed from the walls and many remnants remained in a liquid suspension in the apical part.( Fig 2). The blue color represents the difference between treated and non treted tooth with PUI.


The success of endodontic retreatment depends first of all from the complete removal
of the obturation material and from a deep disinfection of root canal system. C- PUI and C-CUI irrigation methods, if used as a final irrigation technique, decreased the amount of residual filling materials during endodontic retreatment procedures.


Efficacy of ProTaper Universal Retreatment Files in Removing Filling Materials during Root Canal Retreatment
Valentina Giuliani, DMD, Roberto Cocchetti, MD, and Gabriella Pagavino, MD, DMD
Kenee DM, Allemang JD, Johnson JD, et al. A quantitative assessment of efficacy of
various calcium hydroxide removal techniques. J Endod 2006;32:563–5.
Van der Sluis LW, Wu MK, Wesselink PR. The evaluation of removal of calcium hydroxide paste from an artificial standardized groove in the apical root canal using
different irrigation methodologies. Int Endod J 2007;40:52–7.
Salgado RJ, Moura-Netto C, Yamazaki AK, et al. Comparison of different irrigants on calcium hydroxide medication removal: microscopic cleanliness evaluation. Oral
Surg Oral Med Oral Pathol Oral Radiol Endod 2009;107:580–4.
Gu L, Kim JR, Ling J, et al. Review of contemporary irrigant agitation techniques and
devices. J Endod 2009;35:791–804.
Smear Layer Removal and Canal Cleanliness Using Different Irrigation Systems (EndoActivator, EndoVac, and Passive Ultrasonic Irrigation): Field Emission Scanning Electron Microscopic Evaluation in an In Vitro Study
Manuele Mancini, DDS,* Loredana Cerroni, DDS,† Lorenzo Iorio, DDS,* Emiliano Armellin, DDS,† Gabriele Conte, DDS,* and Luigi Cianconi, MD, DDS*