Effectiveness of passive ultrasonic irrigation in improving elimination of smear layer and opening dentinal tubules

Abstract

Objective: To compare the ability to eliminate debris and open dentinal tubules of different ultrasound irrigation procedures. Study Design: Forty extracted single-rooted human teeth were instrumented with mechanical rotatory instrumentation, and divided into four groups: (n=10) according to the final irrigation technique: group A (control), 2.5% NaOCl irrigation with the Miraject needle and no ultrasonic agitation; group B, passive ultrasonic irrigation (PUI) with 2.5% NaOCl and Irrisafe 20 tips; group C, PUI with 2.5% NaOCl and Irrisafe 25 tips; group D, PUI with 2.5% NaOCl and K 25 tips. The amount of debris and the number of opened dentinal tubules was established by scanning electronic microscope. Data were compared using the Kruskal Wallis test. Results: Irrisafe tips (groups B and C) opened up more dentinal tubules and eliminated more debris than conventional irrigation (p<0.05) in the apical third. The middle third shows no significant differences between groups. Irrisafe 25 was more effective than conventional irrigation and K tips (p<0.05) in the coronal third. Conclusions: Ultrasonic activation of the irrigation with Irrisafe tips was the most effective procedure for eliminating the debris and opening up dentinal tubules, especially in the apical third. Key words:Pasive ultrasonic irrigation, irrigation, sodium hypochlorite.

Influence of Irrigants in Association with Ultrasound for Cleaning Root Dentin Surface after Post Space Preparation: EDS Analysis

“…The use of ultrasound in association with irrigants after instrumentation might assist in removing the smear layer, since the vibration produced contributes to a better cleaning of the channel system, in comparison with the irrigating solution alone (Haapasalo et al, 2010;Mozo et al;Plotino et al;Salman et al, 2010). This study, which tested the efficacy of irrigants associated to ultrasonic excitation for cleaning dentin walls of post space, detected improved cleaning aspect when associating ultrasound to irrigants.…”

“…Passive ultrasonic irrigation (PUI) has been used in endodontics in assisting the removal of smear layer after chemo-mechanical preparation of root canals (Capar & Aydinbelge, 2013;Mozo et al, 2014). The tip of the device operates not touching dentinal walls, shaking irrigating substances.…”

Avaliação dos efeitos da irrigação ultrassônica passiva, por meio de microtomografia computadorizada, microscopia óptica e microscopia eletrônica de varredura

“…Diante das evidências de que podemos atingir melhores resultados de limpeza do canal radicular com o uso da P.U.I. (VAN DER SLUIS et al, 2007b;ARIAS;ROMERO, 2011;AHUJA et al, 2014;AHMETOGLU et al, 2014;MOZO et al, 2014), torna-se relevante a avaliação desta etapa, utilizando metodologias que permitam demonstrar a efetividade deste recurso em relação ao arsenal endodôntico disponível. MEV.…”

“…No entanto, as variações anatômicas impedem que os instrumentos e as soluções irrigantes atinjam todas as porções do canal radicular, favorecendo a permanência de remanescentes teciduais e bacterianos no canal radicular, em istmos, reentrâncias e ramificações (CRUZ et al, 2014;MOZO et al, 2014;GUERREIRO-TANOMARU et al, 2015;SCHMIDT et al, 2015).…”

“…A MEV é extremamente aceita para esta finalidade, tendo sido o método por meio do qual se evidenciou a existência dessa camada pela primeira vez (McCOMB;SMITH, 1975) permitindo que inúmeros estudos, sobre as características da camada de "smear", pudessem ser realizados (DAUTEL-MORAZIN et al 1994;DARDA et al, 2014;MOZO et al, 2014;SCHMIDT et al, 2015).…”