CC BY-NC-ND 4.0 · Eur J Dent 2015; 09(02): 234-239
DOI: 10.4103/1305-7456.156834
Original Article
Dental Investigation Society

Root canal retreatment using reciprocating and continuous rotary nickel-titanium instruments

Patricia Fonseca de Souza
1  Department of Endodontics, State University of Amazonas, Manaus, Amazonas, Brazil
,
Leonardo Cantanhede Oliveira Goncalves
1  Department of Endodontics, State University of Amazonas, Manaus, Amazonas, Brazil
,
Andre Augusto Franco Marques
1  Department of Endodontics, State University of Amazonas, Manaus, Amazonas, Brazil
,
Emilio Carlos Sponchiado Junior
2  Department of Endodontics, Federal University of Amazonas, Manaus, Amazonas, Brazil
,
Lucas da Fonseca Roberti Garcia
3  Department of Physiology and Pathology, Araraquara School of Dentistry, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
,
Fredson Marcio Acris de Carvalho
1  Department of Endodontics, State University of Amazonas, Manaus, Amazonas, Brazil
› Author Affiliations
Further Information

Publication History

Publication Date:
04 September 2019 (online)

ABSTRACT

Objective: The complete filling material removal during endodontic retreatment is a clinical procedure difficult to achieve. The aim of this study was to evaluate the efficacy of reciprocating and continuous rotary nickel-titanium instruments used in root canal retreatment. Materials and Methods: Forty freshly extracted human premolars were cleaned and shaped by the crown-down technique, followed by filling by the lateral compaction technique. The teeth were randomly separated into two groups (n = 20), according to the system used for filling material removal: G1 - Reciproc and G2 - ProTaper Universal Retreatment System. The teeth were photographed under operating microscope at ×8 magnification; and the total area of the root canal and remaining filling material were quantified. Results: No statistically significant difference (P > 0.05) in residual filling material was observed between groups; however, the time required for filling removal was significantly shorter for Reciproc system (P < 0.05). Conclusions: It was observed remaining filling material in all teeth, irrespective of the system used; however, root canal retreatment was faster when reciprocating motion was used.