Effectiveness of Different Final Irrigant Activation Protocols on Smear Layer Removal in Curved Canals

摘要: Abstract Introduction A final flush with chelating agents and antiseptic irrigating solutions is needed to remove the smear layer. The improvement of these protocols possible by using specific delivery agitation techniques. This study examined effect different irrigation regimens methods activation on layer removal in curved canals after root canal instrumentation. Methodology Mesial 50 extracted mandibular molars were prepared ProTaper rotary files (Dentsply Maillefer, Ballaigues, Switzerland) 3% NaOCl. Teeth then allocated two control groups four experimental ( n = 10) for as follows: no-activation group (final rinse a 27-gauge needle 17% EDTA/3% NaOCl), manual-dynamic NaOCl + gutta-percha agitation), automated-dynamic RinsEndo [Durr Dental GmbH & Co KG, Bietigheim-Bissingen, Germany]), sonic-activation Endoactivator [Advanced Endodontics, Santa Barbara, CA]). All mesial roots split new approach allow visualization every third canal, particularly apical third. samples scanning electron microscopic observation assess removal. Blind scoring was performed calibrated observers five-score scale. differences scores between analyzed Kruskal-Wallis test Mann-Whitney U test. level significance set at p 0.05. Results Very high levels cleanliness (≤score 3) found each activation. For middle third, significantly less effective than three other (p Conclusion Root benefits from (especially sonic activation) comparison no during regimen.