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01-07-2015 | Original Article

Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals

Authors: Frederico C. Martinho, Lilian F. Freitas, Gustavo G. Nascimento, Aleteia M Fernandes, Fabio R. M. Leite, Ana P. M. Gomes, Izabel C G Camões

Published in: Clinical Oral Investigations | Issue 6/2015

Abstract

Introduction

This clinical study was conducted to compare the effectiveness of single-file reciprocating systems and rotary systems in removing endotoxins and cultivable bacteria in endodontic retreatment.

Methods

Thirty endodontically treated teeth with post-treatment apical periodontitis were selected. The specimens were divided into three groups according to the system used: WaveOne (n = 10), Reciproc instrument (n = 10), and ProTaper Universal Retreatment system (n = 10). Samples were collected before and after chemomechanical preparation. The irrigation was performed by using 2.5 % sodium hypochlorite. A chromogenic limulus amebocyte lysate assay test was used to quantify endotoxins. Culture techniques were used to determine bacterial colony-forming unit counts.

Results

At baseline, endotoxins and cultivable bacteria were recovered from 100 % of the root canal samples in a median value of 5.84 EU/mL and 4.98 × 10³ CFU/mL, respectively. After CMP, no differences were found in the median percentage values of endotoxin reduction achieved with reciprocating systems—WaveOne [94.11 %] and Reciproc [93.29 %] and with rotary systems—ProTaper [94.98 %] (P > 0.05). Both single-file reciprocating systems [WaveOne (98.27 %) and Reciproc (99.54 %)] and rotary system [ProTaper (98.73 %)] were effective in reducing bacterial load (P > 0.05). Moreover, no differences were found among the systems tested.

Conclusions

The Reciproc and WaveOne reciprocating systems were as effective as the ProTaper system for removal of endotoxins and bacteria in endodontic retreatment.

Clinical relevance

All systems tested were effective to remove cultivable bacteria and endotoxin in endodontic retreatment. As no differences among systems were observed, it is possible to suggest that clinicians should choose the preferred technique to perform endodontic.

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Title: Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals
Authors: Frederico C. Martinho
Lilian F. Freitas
Gustavo G. Nascimento
Aleteia M Fernandes
Fabio R. M. Leite
Ana P. M. Gomes
Izabel C G Camões
Publication date: 01-07-2015
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 6/2015
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-014-1360-9

At a glance: The STEP trials

Springer Medicine

Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals

Abstract

Introduction

Methods

Results

Conclusions

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusions

Clinical relevance

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