title: A new weak chelator in endodontics: effects of different irrigation regimens with etidronate on root dentin microhardness.
abstract: 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<0.05) to compare values before and after treatments and analysis of variance (ANOVA) (α<0.05) to detect any differences among thirds. Except G1, all tested irrigation regimens significantly decreased the microhardness. There were no differences between root thirds before treatments, and all root thirds exhibited equal responses to same treatment. Except saline, all tested irrigation regimens reduced the root dentin microhardness.
authors: Dental School, Federal University of Pará, 66075-900 Belém, PA, Brazil.
authors: Talita
authors: T
authors: Tartari
authors: Patrícia
authors: P
authors: de Almeida Rodrigues Silva E Souza
authors: Bruno
authors: B
authors: Vila Nova de Almeida
authors: José Otávio
authors: JO
authors: Carrera Silva Júnior
authors: Oscar
authors: O
authors: Facíola Pessoa
authors: Mario Honorato
authors: MH
authors: Silva E Souza Junior
references: J Endod. 2011 Mar;37(3):358-62
references: 21329821
references: Int Endod J. 2009 Apr;42(4):335-43
references: 19220516
references: J Endod. 2000 May;26(5):278-80
references: 11199735
references: Arch Oral Biol. 1983;28(8):693-700
references: 6579901
references: J Endod. 2006 May;32(5):389-98
references: 16631834
references: J Endod. 2006 Jul;32(7):634-7
references: 16793469
references: J Endod. 2008 Jan;34(1):71-5
references: 18155497
references: J Endod. 1982 Nov;8(11):487-92
references: 6816890
references: Int Endod J. 2002 Nov;35(11):934-9
references: 12453023
references: J Endod. 2004 Dec;30(12):880-2
references: 15564869
references: Int Endod J. 2011 Jun;44(6):491-8
references: 21255047
references: J Mater Sci Mater Med. 2002 Oct;13(10):923-31
references: 15348185
references: J Endod. 2008 Jun;34(6):703-5
references: 18498893
references: J Endod. 2006 Nov;32(11):1102-6
references: 17055917
references: Biomaterials. 2001 Apr;22(8):793-7
references: 11246947
references: Braz Dent J. 2012;23(3):212-7
references: 22814688
references: Biomaterials. 2001 Apr;22(8):787-92
references: 11246946
references: J Biomed Mater Res A. 2003 Sep 15;66(4):850-3
references: 12926037
references: Int Endod J. 2008 May;41(5):418-23
references: 18298573
references: Indian J Dent Res. 2011 Jan-Feb;22(1):22-7
references: 21525672
references: J Endod. 2005 Nov;31(11):817-20
references: 16249726
references: Int Endod J. 2014 Jan;47(1):20-5
references: 23710836
references: Arch Oral Biol. 1983;28(7):645-9
references: 6579896
references: Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Dec;108(6):e29-34
references: 19913717
references: J Conserv Dent. 2012 Apr;15(2):170-3
references: 22557818
references: J Endod. 2008 Jul;34(7):850-4
references: 18570994
references: Bone. 1999 Jul;25(1):97-106
references: 10423031