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      Efficacy of protaper next and protaper universal retreatment systems in removing gutta-percha in curved root canals during root canal retreatment

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          Abstract

          Purpose:

          The aim of this study was to compare the cleanliness of root canal walls after retreatment using ProTaper Next (PTN), ProTaper Universal Retreatment (PTR) nickel-titanium (NiTi) systems and Hedström hand files in curved mesial canals of mandibular molar teeth and the time required for gutta-percha and sealer removal.

          Materials and Methods:

          Ninety mandibular molar teeth with curved mesial roots were instrumented up to #35.04 with Mtwo NiTi rotary instruments and obturated using the continuous wave of condensation technique. Removal of gutta-percha and sealer was performed using one of the following: PTN and PTR NiTi systems and Hedström hand files. Samples were placed on the VistaScan phosphor plates in the mesio-distal direction and the radiographs were taken. The digital radiographs were analyzed using AutoCAD software. Also, the total time required for gutta-percha removal was calculated by a chronometer.

          Results:

          The total retreatment time was significantly shorter in the PTN and PTR groups compared with the manual group (p<0.05). There was a significant difference between the groups according to the total residual gutta-percha and sealer (p<0.05). The PTN and PTR groups left significantly less gutta-percha and sealer remnant than the manual group (p<0.001).

          Conclusion:

          Within the limitations of this study, the PTN and PTR groups showed less residual gutta-percha and sealer than the manual group. The NiTi rotary systems were significantly faster than the manual group in the time required for gutta-percha and sealer removal.

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          Most cited references29

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          Flare-ups in endodontics: I. Etiological factors.

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            Efficacy of reciprocating and rotary techniques for removing filling material during root canal retreatment.

            To compare the efficacy of reciprocating and rotary techniques with that of hand files for removing gutta-percha and sealer from root canals.
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              Efficacy of 2 reciprocating systems compared with a rotary retreatment system for gutta-percha removal.

              The maximum removal of root canal filling material is essential for successful endodontic retreatment. The purpose of this study was to assess the efficacy of 2 reciprocating systems (Reciproc [VDW, Munich, Germany] and WaveOne [Dentsply Maillefer, Ballaigues, Switzerland]) compared with a nickel-titanium (NiTi) rotary system (ProTaper Universal Retreatment [Dentsply Maillefer]) in the removal of root canal filling material.
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                Author and article information

                Journal
                J Istanb Univ Fac Dent
                J Istanb Univ Fac Dent
                J. Istanbul Univ. Fac. Dent.
                jiufd
                jiufd
                IUFD
                Journal of Istanbul University Faculty of Dentistry
                Istanbul University Faculty of Dentisty (Istanbul, Turkey )
                2149-2352
                2149-4592
                2017
                03 April 2017
                : 51
                : 2
                : 7-13
                Affiliations
                [1 ]Department of Endodontics Faculty of Dentistry Ondokuz Mayıs University Turkey
                Author notes
                [* ]To whom correspondence should be addressed: Dr. Taha OzyurekeduDepartment of Endodontics Faculty of Dentistry Ondokuz Mayıs University 55137 - SamsunTurkey Phone: +90 362 312 19 19 tahaozyurek@ 123456hotmail.com
                Article
                jiufd-51-2-416
                10.17096/jiufd.97431
                5573468
                28955590
                0d6b58d4-d0ee-44a6-87f2-d5f3a59f4bfb
                Copyright © 2017 Journal of Istanbul University Faculty of Dentistry

                This article is licensed under Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license ( https://creativecommons.org/licenses/by-nc-nd/4.0/). Users must give appropriate credit, provide a link to the license, and indicate if changes were made. Users may do so in any reasonable manner, but not in any way that suggests the journal endorses its use. The material cannot be used for commercial purposes. If the user remixes, transforms, or builds upon the material, he/she may not distribute the modified material. No warranties are given. The license may not give the user all of the permissions necessary for his/her intended use. For example, other rights such as publicity, privacy, or moral rights may limit how the material can be used.

                History
                : 31 May 2016
                : 08 August 2016
                Categories
                Articles
                Biological Sciences
                Dentistry

                protaper next,protaper universal,retreatment,curved canals,endodontics

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