Efficacy of Removing Thermafil and GuttaCore from Straight Root Canal Systems Using a Novel Non-Surgical Root Canal Re-Treatment System: A Micro-Computed Tomography Analysis.

Vicente Faus-Llácer,Celia Ruiz-Sánchez,Rubén Linero Pérez,Álvaro Zubizarreta-Macho,Salvatore Sauro,Ignacio Faus-Matoses,Vicente Faus-Matoses

doi:10.3390/jcm10061266

Abstract

The present study aims to evaluate the effectiveness of an XP-endo non-surgical root canal re-treatment system in removing both GuttaCore and Thermafil gutta-percha carrier-based root canal filling materials from straight root canal systems using micro-computed tomography (micro-CT) analysis. The study was performed on 20 single-rooted upper teeth, which were randomly allocated into the following study groups: Group A, Thermafil and AH Plus sealer (n = 10); Group B, GuttaCore and AH Plus sealer (n = 10). Before and after the non-surgical root canal re-treatment procedure, the samples were submitted for a micro-CT analysis. The volume of the root canal filling material (mm3), the volume of the remaining root canal filling material (mm3) and the time (minutes) needed to remove the root canal filling material were also recorded. Student’s t-test was used to analyze the results. No statistically significant differences were found between the volume of the remaining root canal filling material in the GuttaCore and Thermafil root canal filling systems at the coronal third (p = 0.782), middle third (p = 0.838) or apical third (p = 0.882) of the straight root canal systems; however, the GuttaCore required a statistically significant (p = 0.037) shorter amount of time (4.72 ± 0.76 min) to be removed than the Thermafil carrier-based root canal filling material (5.92 ± 1.42 min). The XP-endo Finisher non-surgical endodontic re-treatment system removes both GuttaCore and Thermafil gutta-percha carrier-based root canal filling materials from straight root canal systems, although removal of the GuttaCore gutta-percha carrier-based root canal filling material required less time.

Highlights

Licensee MDPI, Basel, Switzerland.At present, root canal treatment has a reported survival rate of up to 84.1% [1] to97.3% [2]; intraoperative complications during the endodontic therapy can potentially lead to treatment failure [3], continued primary endodontic infection [4,5] and the possible need for subsequent treatment options including non-surgical root canal re-treatment, endodontic surgery, autotransplantation, intentional replantation or tooth extraction [6,7,8,9]
Root canal treatment failure is frequently linked to insufficient disinfection published maps and institutional affil
Non-surgical root canal re-treatment is recommended as a first treatment approach for the removal of root canal filling material, enabling thorough cleaning, disinfection and re-instrumentation of the root canal system [14,15,16]

Summary

Introduction

Licensee MDPI, Basel, Switzerland.At present, root canal treatment has a reported survival rate of up to 84.1% [1] to97.3% [2]; intraoperative complications during the endodontic therapy can potentially lead to treatment failure [3], continued primary endodontic infection [4,5] and the possible need for subsequent treatment options including non-surgical root canal re-treatment, endodontic surgery, autotransplantation, intentional replantation or tooth extraction [6,7,8,9]. Non-surgical root canal re-treatment is recommended as a first treatment approach for the removal of root canal filling material, enabling thorough cleaning, disinfection and re-instrumentation of the root canal system [14,15,16]. Numerous non-surgical root canal re-treatment techniques and materials have been proposed, including stainless steel hand files, nickel titanium (NiTi) endodontic rotary and reciprocating instruments, specialized. The adjuvant use of gutta-percha solvent agents or heat application has been proposed for facilitating access to the root canal system for removal of the root canal filling material [18] in order to enable proper cleaning, shaping and disinfection of the root canal system. Many non-surgical root canal re-treatment techniques can be used to remove root canal filling material within the root canal system, none of them are capable of completely removing all the aforementioned filling material [17]; novel non-surgical root canal re-treatment systems have been proposed, such as the XP-Endo Retreatment System (FKG Dentaire, La-Chaux-de-Fonds, Switzerland), which is composed of three endodontic rotary files: the DR1 endodontic rotary file has been designed with alternating cutting edges and a triangular cross-section and the XP-endo Shaper and XP-endo Finisher R endodontic rotary files are made of NiTi

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Conclusion