A New Weak Chelator in Endodontics: Effects of Different Irrigation Regimens with Etidronate on Root Dentin Microhardness

• Published in: International Journal of Dentistry 2013-01, Vol.2013 (2013), p.399-404
• Main Authors: Tartari, Talita, de Almeida Rodrigues Silva e Souza, Patrícia, Vila Nova de Almeida, Bruno, Carrera Silva Júnior, José Otávio, Facíola Pessoa, Oscar, Silva e Souza Junior, Mario Honorato
• Format: Article
• Language: English
• Subjects: Chemical properties; Dentin; Endodontics; Ethylenediaminetetraacetic acid; Irrigation; Microhardness; Sodium hypochlorite; Studies; Teeth
• ISSN: 1687-8728; 1687-8736
• DOI: 10.1155/2013/743018

This study investigated the effect of sodium hypochlorite (NaOCl), ethylenediaminetetraacetic (EDTA), etidronic (HEBP), and citric acid (CA) associated in different irrigation regimens on root dentin microhardness. Forty-five root halves of single-rooted teeth were sectioned into thirds that were embedded in acrylic resin, polished, randomly assigned into 3 groups, and treated as follows: G1: saline solution; G2: 5% NaOCl + 18% HEBP, mixed in equal parts; and G3: 2.5% NaOCl. After measurements, the G3 samples were distributed into subgroups G4, G5, and G6, which were submitted to 17% EDTA, 10% CA and 9% HEBP, respectively. Following the new measurements, these groups received a final flush with 2.5% NaOCl, producing G7, G8, and G9. Microhardness was measured with Knoop indenter under a 25 g load for 15 seconds, before and after treatments. The data were statistically analyzed using paired Student’s t-test (α