کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3145802 1197106 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of sodium hypochlorite on primary dentin—A scanning electron microscopy (SEM) evaluation
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Effect of sodium hypochlorite on primary dentin—A scanning electron microscopy (SEM) evaluation
چکیده انگلیسی

ObjectiveThe aim of this study was to evaluate the alterations of etched deciduous dentin when submitted to different time and concentrations of sodium hypochlorite (NaOCl), using scanning electron microscopy (SEM).Material and methodsForty deciduous anterior teeth were selected, cleaned and ground until expose a flat dentin area on the buccal surface. The specimens were randomly distributed into eight groups (n = 5), according to dentin surface treatment (35% phosphoric acid etching for 7 s—AE and/or NaOCl application), NaOCl solution concentration (5% or 10%), and time of application (0, 30, 60, and 120 s), as follows: G1: control (without AE and NaOCl); G2: only AE; G3, G4, and G5: AE + 5% NaOCl for 30, 60, and 120 s, respectively; G6, G7, and G8: AE + 10% NaOCl for 30, 60, and 120 s, respectively. All specimens were prepared for SEM analysis and the photomicrographs (three for each specimen) were classified according to a score as follow: 0: presence of smear layer (SL); 1: absence of SL + non-altered collagen fibrils; 2: absence of SL + collagen fibrils slightly altered; 3: absence of SL + collagen fibrils severely altered; and 4: absence of SL and absence of collagen fibrils. Data were submitted to Kruskal–Wallis and Mann–Whitney tests (p < 0.05).ResultsAll groups treated with NaOCl solution were significant different from G1 and G2, and showed alterations on the collagen fibrils network. Collagen complete removal was only observed when a 5% NaOCl solution was applied for 120 s and 10% NaOCl solution for 30, 60, and 120 s.ConclusionsThe NaOCl action produced significant changes in the etched deciduous dentin. The higher NaOCl concentration, the lower the time required to completely removing the collagen fibrils network in deciduous dentin.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dentistry - Volume 34, Issue 7, August 2006, Pages 454–459
نویسندگان
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