Decalcification of root canal dentine by citric acid, EDTA and sodium citrate

Autor: S. González-López, M. P. González-Rodríguez, L. F. Machado-Silveiro
Rok vydání: 2004
Předmět:
Zdroj: International Endodontic Journal. 37:365-369
ISSN: 1365-2591
0143-2885
DOI: 10.1111/j.1365-2591.2004.00813.x
Popis: Aim To measure the demineralization capability of 1 and 10% citric acid, 10% sodium citrate and 17% EDTA during immersions of 5, 10 and 15 min on root canal dentine. Methodology Crowns were sectioned from eight maxillary canines. The cementum was removed from the cervical third of the roots to expose the dentine. Canals were prepared using a handpiece-mounted Largo Peeso reamer. A 3-mm thick cross-sectional slice was obtained from the cervical third of each root. Each slice was sectioned into four equal parts. These specimens were assigned to one of four groups (n = 8) for the application of 1% citric acid, 10% citric acid, 10% sodium citrate or 17% EDTA. Each specimen underwent three successive 5-min immersions in each solution at room temperature. The solutions were not renewed between immersions. Two millimetres of solution were collected from the extracts and lanthanum oxide was added for the calcium reading by spectrophotometry. To compare the amounts of calcium removed by each solution, the Friedman test was used for the global comparison and the Wilcoxon test for paired comparisons. Differences between groups were evaluated using the Kruskal–Wallis test for the global comparison and Mann–Whitney test for paired comparisons. Results Overall, 1 and 10% citric acid were more effective than EDTA or sodium citrate at the three immersion times (P
Databáze: OpenAIRE
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