Eficacia de la irrigación ultrasónica, sónica y agitación manual dinámica en la remoción de hidróxido de calcio de conductos radiculares de dientes Bovinos

Abstract

Objective: To compare the irrigation techniques: ultrasonic, sonic and manual dynamic activation in the removal of Ca(OH)2 from simulated grooves in bovine teeth. Materials and Methods: An in vitro study was performed on one hundred and six bovine incisors, where their root canals were prepared up to a file of diameter 60. The roots were divided longitudinally to create a groove 2mm from the apex which was filled with Ca(OH)2, then the halves were reassembled and after 7 days of incubation the techniques were applied: passive ultrasonic irrigation (PUI), sonic irrigation [Endo Activator (EA)] and manual dynamic activation (MDA), using 5% NaOCl as irrigant. Positive control and negative control were used. Samples were analyzed using a stereomicroscope and images were taken with a digital camera. Two calibrated observers (Kappa> 0.8) evaluated the removal according to the van der Sluis scores and the results were analyzed using the Chi Square test. Results: Effectiveness percentages in Ca(OH)2 removal were 87.5%; 46.9% and 28.1% for PUI, EA and MDA respectively. The PUI irrigation protocol was superior and obtained a statistically significant difference compared to the other evaluated techniques (P <0.01). Conclusions: PUI eliminated significantly more Ca(OH)2 from the simulated grooves than the EA and MDA protocols. Keywords: Calcium hydroxide removal, ultrasonic irrigation, sonic irrigation, Endo Activator, manual dynamic activation, endodontics