| Autor: |
Kuga MC, Gouveia-Jorge E, Tanomaru-Filho M, Guerreiro-Tanomaru JM, Bonetti-Filho I, Faria G |
| Zdroj: |
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology & Endodontology; Dec2011, Vol. 112 Issue 6, pe155-9, 1p |
| Abstrakt: |
OBJECTIVE: The objective of this study was to evaluate the penetration of 2.5% NaOCl associated with 17.0% EDTA, 1.0% citric acid, and 1.0% peracetic acid into dentin tubules. STUDY DESIGN: The roots of 44 bovine incisors were cross-sectioned and 5-mm-long fragments were produced from their middle thirds. The specimens were instrumented with ProTaper hand files, stained in crystal violet, then sectioned mesiodistally. The buccal fragments were divided into 4 groups (n = 9) and subjected to 2 consecutive 10-minute immersion periods in one of the following acid solutions combined with 2.5% NaOCl: 17.0% EDTA (group 1), 1.0% citric acid (group 2), and 1.0% peracetic acid (group 3). Nine fragments were immersed in 2.5% NaOCl (group 4). The analysis of the penetration of NaOCl solutions into dentin was performed by measuring the depth of crystal violet stain that was bleached using a steromicroscope under x50 magnification. Statistical comparisons were carried out by Kruskal-Wallis and Dunn's tests at the 5% significance level. RESULTS: Group 1 showed less penetration into dentin than group 4 (P < .05). No statistically significant differences were observed among groups 2, 3, and 4 (P > .05). CONCLUSIONS: Association of NaOCl with acid solutions did not increase its penetration depth into root dentin. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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