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. 2022 Jun 19;9(6):260.
doi: 10.3390/bioengineering9060260.

Effectiveness of the REvision System and Sonic Irrigation in the Removal of Root Canal Filling Material from Oval Canals: An In Vitro Study

Marc Krikor Kaloustian  1 , Claire El Hachem  2 , Carla Zogheib  1 , Walid Nehme  1 , Louis Hardan  3 , Pamela Rached  4 , Naji Kharouf  4   5 , Youssef Haikel  4   5   6 , Davide Mancino  4   5   6
Affiliations

Effectiveness of the REvision System and Sonic Irrigation in the Removal of Root Canal Filling Material from Oval Canals: An In Vitro Study

Marc Krikor Kaloustian et al. Bioengineering (Basel). .

Abstract

This study aimed to evaluate the effectiveness of the Endostar REvision system (Poldent, Warsaw, Poland) in the removal of filling materials from oval root canals using sonic irrigation as an additional cleaning method. Thirty human-extracted mandibular premolars with oval canals were prepared using the ProTaper Universal system (Dentsply Maillefer, Ballaigues, Switzerland) up to instrument F1 (20/.07), and then filled by the continuous wave vertical compaction technique using pulp canal sealer EWT (Sybron Dental Specialties, Orange, CA, USA). The teeth were randomly divided into two groups (n = 15) according to the instrumentation system and the additional cleaning method, as follows: REvision (30/.08, 25/.06) with EQ-S sonic activation (Meta Biomed, Chungcheongbuk-do, Korea), REvision (30/.08, 25/.06) without additional activation. All specimens were sectioned longitudinally at 3 and 7 mm from the apex, and analyzed using digital microscopy (KEYENCE, Osaka, Japan) to measure the total area of the residual obturation materials, followed by SEM analysis. The data on the percentage of remaining filling material were analyzed by Kruskal−Wallis one-way Analysis of Variance on ranks. None of the retreatment protocols completely removed the filling material from the root canals (p > 0.05); the retreatment technique using sonic activation showed statistically less residual filling materials than the retreatment technique using irrigants without activation at the coronal third (p < 0.05), whilst no significant difference was found between both tested groups at the apical and middle thirds (p > 0.05). The REvision system showed promising results in the removal of filling materials from oval canals.

Keywords: filling materials removal; oval-shaped canal; retreatment procedure; revision system; sonic activation.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Scanning electron microscopy images demonstrating the Endostar REvision instrument (30/08 and 25/06).
Figure 2
Figure 2
Methodology of residual materials area measurements using VHX-5000 software.
Figure 3
Figure 3
Scanning electron microscope micrographs showing the different observed colors and structures of the root canal and residual materials, which were detected under a digital microscope. (a) Digital microscope image; (b) residual materials (gutta-percha/sealer); (c) dentinal wall with open tubules; (d) residual materials–dentin interface; (e) dentinal walls with closed tubules.
Figure 4
Figure 4
Digital microscope images demonstrate the effectiveness of the retreatment technique with irrigant activation (a–c) and without irrigant activation (d–f) in the apical, middle, and coronal thirds of the root canal.
See this image and copyright information in PMC

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