In vitro sealing ability of white and gray mineral trioxide aggregate (MTA) and white Portland cement used as apical plugs

摘要: This study evaluated the sealing ability of apical plugs made white and gray MTA-Angelus Portland cement placed via root canal having different thicknesses (2, 5 7 mm). Ninety extracted human single-rooted teeth were instrumented using a size 40 K-file to standardize foraminal opening by stepback technique. The assigned 3 groups (n=30), according material used for fabrication plugs: A = MTA; B C cement. subdivided into 10 each plug thickness Marginal dye leakage was assessed 0.2% Rhodamine solution in which specimens immersed 72 hours at 37 degrees C. roots sectioned longitudinally buccolingual direction exposure, digital photographs taken analyzed Image Tool image-analysis software. Data statistically Kruskal-Wallis Dunn's tests. Significance level set 5%. least percent observed 5- 7-mm-thick (p 0.05) found between MTA Among three materials analyzed, presented highest marginal (p<0.05). findings present showed that had better than when as plugs. Dye smaller compared 2-mm-thick