Effectiveness of etidronate in root canal smear layer removal: A study with scanning electron microscopy

Ingrid Amanajás de OLIVEIRA, Ana Daniela Silva da SILVEIRA, Brenna Magdalena Lima NOGUEIRA, Carla Ruffeil Moreira MESQUITA e Cláudia Pires ROTHBARTH

Introduction: We evaluated the effect of individual and combined use of 18% etidronate (HEBP) in root canal smear layer removal using scanning electron microscopy (SEM). Methods: Thirty human single-rooted teeth were used. The roots were prepared with ProTaper Universal System rotary files and randomly divided into three groups according to the irrigation protocol used. G1: 2.5% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA); G2: 2.5% NaOCl and 18% HEBP; and G3: 2.5% NaOCl + HEBP 18%, mixed in equal parts. The roots were sectioned longitudinally and metallized for SEM analysis. The photomicrographs obtained from the cervical, middle, and apical thirds were evaluated by three calibrated examiners, who assigned scores from 1 to 5 to the images. The experimental groups were compared using the Kruskal-Wallis test and the Student-Newman-Keuls test. Root thirds were compared by the Friedman test. The level of significance was set at 5%. Results: The capacity for removal of the smear layer by 2.5% NaOCl and 18% HEBP (G2) was similar to that achieved with 2.5% NaOCl and 17% EDTA (G1) in the cervical and middle thirds of the root; the cleansing level of the apical third was similar, regardless of the irrigation protocol used. Conclusion: HEBP is a promising solution for use in endodontic treatments.

Keywords: Etidronic Acid. Sodium Hypochlorite. Dissolution. Organic Matter.

How to cite: Oliveira IA, Silveira ADS, Nogueira BML, Mesquita CRM, Rothbarth CP. Effectiveness of etidronate in root canal smear layer removal: A study with scanning electron microscopy. Dental Press Endod. 2020 Jan-Apr;10(1):27-31.

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