Artículos de revistas
Efficacy of NiTi rotary instruments in removing calcium hydroxide dressing residues from root canal walls
Fecha
2012-02-01Registro en:
Brazilian Oral Research. Sociedade Brasileira de Pesquisa Odontológica , v. 26, n. 1, p. 19-23, 2012.
1806-8324
10.1590/S1806-83242012000100004
S1806-83242012000100004
WOS:000311862300004
S1806-83242012000100004.pdf
1627568419811788
4566192900068248
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal do Rio Grande do Sul (UFRGS)
Universidade de São Paulo (USP)
Institución
Resumen
The aim of this study was to evaluate the efficacy of three rotary instrument systems (K3, ProTaper and Twisted File) in removing calcium hydroxide residues from root canal walls. Thirty-four human mandibular incisors were instrumented with the ProTaper System up to the F2 instrument, irrigated with 2.5% NaOCl followed by 17% EDTA, and filled with a calcium hydroxide intracanal dressing. After 7 days, the calcium hydroxide dressing was removed using the following rotary instruments: G1 - NiTi size 25, 0.06 taper, of the K3 System; G2 - NiTi F2, of the ProTaper System; or G3 - NiTi size 25, 0.06 taper, of the Twisted File System. The teeth were longitudinally grooved on the buccal and lingual root surfaces, split along their long axis, and their apical and cervical canal thirds were evaluated by SEM (×1000). The images were scored and the data were statistically analyzed using the Kruskall Wallis test. None of the instruments removed the calcium hydroxide dressing completely, either in the apical or cervical thirds, and no significant differences were observed among the rotary instruments tested (p > 0.05).