Shaping ability and apical debris extrusion after root canal preparation with rotary or reciprocating instruments: a micro-CT study
Da Silva Emmanuel Joao Nogueira Leal, de Moura Sara Gomes, de Lima Carolina Oliveira, Barbosa Ana Flavia Almeida, Misael Waleska Florentino, Lacerda Mariane Floriano Lopes Santos, Sassone Luciana Moura,
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( Da Silva Emmanuel Joao Nogueira Leal ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
( de Moura Sara Gomes ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
( de Lima Carolina Oliveira ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
( Barbosa Ana Flavia Almeida ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
( Misael Waleska Florentino ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
( Lacerda Mariane Floriano Lopes Santos ) - Federal University of Juiz de Fora Department of Clinical Dentistry
( Sassone Luciana Moura ) - State University of Rio de Janeiro School of Dentistry Department of Endodontics
Abstract
Objectives: The aim of this study was to evaluate the shaping ability of the TruShape and Reciproc Blue systems and the apical extrusion of debris after root canal instrumentation. The ProTaper Universal system was used as a reference for comparison.
Materials and Methods: Thirty-three mandibular premolars with a single canal were scanned using micro-computed tomography and were matched into 3 groups (n = 11) according to the instrumentation system: TruShape, Reciproc Blue and ProTaper Universal. The teeth were accessed and mounted in an apparatus with agarose gel, which simulated apical resistance provided by the periapical tissue and enabled the collection of apically extruded debris. During root canal preparation, 2.5% sodium hypochlorite was used as an irrigant. The samples were scanned again after instrumentation. The percentage of unprepared area, removed dentin, and volume of apically extruded debris were analyzed. The data were analyzed using 1-way analysis of variance and the Tukey test for multiple comparisons at a 5% significance level.
Results: No significant differences in the percentage of unprepared area were observed among the systems (p > 0.05). ProTaper Universal presented a higher percentage of dentin removal than the TruShape and Reciproc Blue systems (p < 0.05). The systems produced similar volumes of apically extruded debris (p > 0.05).
Conclusions: All systems caused apically extruded debris, without any significant differences among them. TruShape, Reciproc Blue, and ProTaper Universal presented similar percentages of unprepared area after root canal instrumentation; however, ProTaper Universal was associated with higher dentin removal than the other systems.
키워드
Apical extrusion of debris; Root canal preparation; X-ray microtomography
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