Assessment of coronary microleakage marker capacity of three dyes

Admin Dental Press

Edition V02N02 | Year 2012 | Editorial Original Article | Pages 30 to 36

Juliana Francisca Grossi Heleno, Eduardo Nunes, Maria Ilma Sousa Côrtes, Frank Ferreira Silveira

Objective: The aim of this study was to assess the marker capacity of 2% methylene blue, 2% Rhodamine B and 5% nickel sulfate. Methods: After biomechanical canal preparation in 84 single-root pre-molar teeth extracted from human beings, the access cavities were sealed with Coltosol® and the specimens were made impermeable, except for 1 mm adjacent to the temporary sealing. The samples were immersed in the staining solutions and kept in an oven at 37 ºC for 3 and 7 days, and were submitted to thermal cycling. During this period, 300 cycles (5 ºC and 55 °C) of 30 seconds each were performed in a specific appliance with a digital programmer for temperature, time and number of cycles. Longitudinal sections of the specimens were obtained and observed under stereomicroscopic lens. Results: The statistical results by the Analysis of Variance showed a significant difference (p<0.05) among the groups and between the two time intervals assessed. Conclusion: There was greater leakage in the 7 day interval in all groups, and the Rhodamine B dye exhibited the higher mean leakage depth values in the two time intervals, followed by methylene blue and nickel sulfate. Dyes, Microleakage,

Heleno JFG, Nunes E, Côrtes MIS, Silveira FF. Assessment of coronary microleakage marker capacity of three dyes. Dental Press Endod. 2012 Apr-June;2(2):30-6.

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