Davide Mancino1,2, Naji Kharouf1,2, Mauro Cabiddu3, Frédéric Bukiet4,5, Youssef Haïkel1,2. 1. Department of Endodontics and Conservative Dentistry, Faculty of Dental Medicine, University of Strasbourg, 67000, Strasbourg, France. 2. Biomaterials and Bioengineering, INSERM UMR_S 1121, Strasbourg University, 67000, Strasbourg, France. 3. Department of Endodontics and Restorative Dentistry, Faculty of Dental Medicine, University of Turin, Turin, Italy. 4. CNRS, ISM, Inst Movement Sci, Aix Marseille Université, Marseille, France. frederic.bukiet@univ-amu.fr. 5. Service d'Odontologie, APHM, Hôpital Timone, Marseille, France. frederic.bukiet@univ-amu.fr.
Abstract
OBJECTIVES: The aim of this study was to assess the filling quality of five obturation techniques in oval-shaped root canals. MATERIALS AND METHODS:A total of 212 mandibular first molars with one distal oval canal were selected. Distal canals, shaped with WaveOne Gold Primary, were randomly divided in five groups (n = 40) for obturation: continuous wave condensation, GuttaCore, Thermafil, single cone with AH plus, and single cone with BioRoot RCS. The proportions of gutta-percha-filled areas (GPFA), sealer-filled areas (SFA), void areas (VA), and the sealer/gutta tags into dentinal tubules at 4 mm and 2 mm from the apex were analyzed by an optical numeric microscope, SEM, and energy-dispersive X-ray (EDX). Data were then compared by Kruskal-Wallis one-way ANOVA on ranks (α = 0.05). RESULTS: At 4 mm, a statistically significant higher GPFA and lower SFA were observed in the GuttaCore and Thermafil groups compared with the 3 other groups. A statistically significant lower VA was observed in the continuous wave condensation, GuttaCore, and Thermafil groups than in the two single-cone groups. At 2 mm, there were a statistically significant higher GPFA and lower SFA and VA in GuttaCore and Thermafil groups than in the 3 other groups. At the two levels investigated, the presence of gutta-percha tags was clearly demonstrated for GuttaCore and Thermafil groups; no tags were observed in the 3 other groups. CONCLUSIONS:Obturation quality was overall improved in GuttaCore and Thermafil groups. CLINICAL RELEVANCE: Carrier-based techniques may significantly improve the filling quality compared to continuous wave condensation and single-cone technique. The single-cone technique might have inherent limitations especially in oval root canals regardless of the sealer used.
RCT Entities:
OBJECTIVES: The aim of this study was to assess the filling quality of five obturation techniques in oval-shaped root canals. MATERIALS AND METHODS: A total of 212 mandibular first molars with one distal oval canal were selected. Distal canals, shaped with WaveOne Gold Primary, were randomly divided in five groups (n = 40) for obturation: continuous wave condensation, GuttaCore, Thermafil, single cone with AH plus, and single cone with BioRoot RCS. The proportions of gutta-percha-filled areas (GPFA), sealer-filled areas (SFA), void areas (VA), and the sealer/gutta tags into dentinal tubules at 4 mm and 2 mm from the apex were analyzed by an optical numeric microscope, SEM, and energy-dispersive X-ray (EDX). Data were then compared by Kruskal-Wallis one-way ANOVA on ranks (α = 0.05). RESULTS: At 4 mm, a statistically significant higher GPFA and lower SFA were observed in the GuttaCore and Thermafil groups compared with the 3 other groups. A statistically significant lower VA was observed in the continuous wave condensation, GuttaCore, and Thermafil groups than in the two single-cone groups. At 2 mm, there were a statistically significant higher GPFA and lower SFA and VA in GuttaCore and Thermafil groups than in the 3 other groups. At the two levels investigated, the presence of gutta-percha tags was clearly demonstrated for GuttaCore and Thermafil groups; no tags were observed in the 3 other groups. CONCLUSIONS: Obturation quality was overall improved in GuttaCore and Thermafil groups. CLINICAL RELEVANCE: Carrier-based techniques may significantly improve the filling quality compared to continuous wave condensation and single-cone technique. The single-cone technique might have inherent limitations especially in oval root canals regardless of the sealer used.
Entities:
Keywords:
Filling quality; Gutta-percha tags; Root canal; Void areas