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. 2015 Apr-Jun;9(2):234-239.
doi: 10.4103/1305-7456.156834.

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

Patricia Fonseca de Souza  1 , Leonardo Cantanhede Oliveira Goncalves  1 , Andre Augusto Franco Marques  1 , Emilio Carlos Sponchiado Junior  2 , Lucas da Fonseca Roberti Garcia  3 , Fredson Marcio Acris de Carvalho  1
Affiliations

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

Patricia Fonseca de Souza et al. Eur J Dent. 2015 Apr-Jun.

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.

Keywords: Reciprocating motion; root canal retreatment; rotary instruments.

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Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Radiographic examination of teeth after filling to ensure the filling quality
Figure 2
Figure 2
Remaining filling material evaluation. (a) Calculation of the total area (mm2). (b) Calculation of the remaining filling material area (mm2) (indication)
Figure 3
Figure 3
(a and b) Representative images of samples from Group 1. (c and d) Representative images of samples from Group 2. Note the presence of remaining filling material attached to the root canal walls (indication)
See this image and copyright information in PMC

References

    1. Kvist T, Reit C. Postoperative discomfort associated with surgical and nonsurgical endodontic retreatment. Endod Dent Traumatol. 2000;16:71–4. - PubMed
    1. Del Fabbro M, Taschieri S. A systematic review on the outcome of surgical vs non-surgical procedure for the retreatment of periapical lesions. Minerva Stomatol. 2007;56:621–32. - PubMed
    1. Kvist T. Endodontic retreatment. Aspects of decision making and clinical outcome. Swed Dent J Suppl. 2001;144:1–57. - PubMed
    1. Bramante CM, Fidelis NS, Assumpção TS, Bernardineli N, Garcia RB, Bramante AS, et al. Heat release, time required, and cleaning ability of MTwo R and ProTaper universal retreatment systems in the removal of filling material. J Endod. 2010;36:1870–3. - PubMed
    1. Jantarat J, Malhotra W, Sutimuntanakul S. Efficacy of grapefruit, tangerine, lime, and lemon oils as solvents for softening gutta-percha in root canal retreatment procedures. J Investig Clin Dent. 2013;4:60–3. - PubMed