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      Evaluation of canal patency and cleanliness following retreatment of bioceramic sealer‐obturated root canals using three different irrigant activation protocols

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          Abstract

          This study evaluated the effectiveness of three different irrigant activation techniques in cleaning and establishing patency during retreatment of root canals obturated with gutta‐percha and bioceramic sealer. 60 extracted premolars with oval‐shaped canals were instrumented and obturated with gutta‐percha and EndosequenceBC sealer using the ‘warm hydraulic condensation’ technique. The teeth were retreated using Protaper Universal Retreatment and XP‐Endo Shaper system and divided into four groups according to the irrigant activation protocol used: control, passive ultrasonic irrigation (PUI), Endovac irrigation (EVI) and XP‐Endo Finisher R (XPFR). Apical patency was achieved in all the samples of the XPFR group (100%), which showed a significantly higher success rate compared with the control (73.3%) and EVI groups (73.3%) ( p < 0.05). The scanning electron microscopic evaluation revealed significantly cleaner middle and apical third root canals in the PUI and XPFR groups compared with the control group ( p < 0.05). These findings suggest that XPFR effectively cleans and establishes patency in root canals filled with bioceramic sealers.

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          Most cited references39

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          Unprepared root canal surface areas: causes, clinical implications, and therapeutic strategies

          Abstract: Chemomechanical preparation is intended to clean, disinfect, and shape the root canal. This step is of utmost importance during treatment of infected teeth with apical periodontitis, because treatment outcome depends on how effectively the clinician eliminates bacteria, their products, and necrotic tissue that would serve as substrate for bacterial regrowth. Nonetheless, curvatures and complex internal anatomical variations of the root canal system can pose a high degree of difficulty in reaching these goals. In infected teeth, bacteria may persist not only in difficult-to-reach areas such as isthmuses, ramifications, dentinal tubules, and recesses from C-shaped or oval/flattened canals, but also in areas of the main canal wall that remain untouched by instruments. If bacteria withstand chemomechanical procedures, there is an augmented risk for post-treatment apical periodontitis. This article discloses the reasons why some areas remain unprepared by instruments and discusses strategies to circumvent this issue and enhance infection control during endodontic treatment/retreatment of teeth with apical periodontitis.
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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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              Sealers and warm gutta-percha obturation techniques.

              Warm vertically compacted gutta-percha obturation techniques use root canal sealers that are heated during the obturation. This study aims at investigating the suitability of selected sealers with warm gutta-percha obturation techniques.
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                Author and article information

                Contributors
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                Journal
                Australian Endodontic Journal
                Aust Endodontic J
                Wiley
                1329-1947
                1747-4477
                December 2024
                May 15 2024
                December 2024
                : 50
                : 3
                : 475-485
                Affiliations
                [1 ] Department of Conservative Dentistry and Endodontics, Dr Z.A Dental College Aligarh Muslim University Aligarh India
                Article
                10.1111/aej.12855
                284b7a77-8743-45c5-ac74-17d7d3ded7b5
                © 2024

                http://onlinelibrary.wiley.com/termsAndConditions#vor

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