An in vitro comparison of coronal microleakage of three materials as intraorifice plug in root filled teeth

Abstract

Intraorifice plug in root filled teeth is one of the most effectiven methods for prevention of coronal microleakage. The purpose of this study was to compare the coronal microleakage of three materials (GlassEionomer, ProRoot MTA and Resilon) as intraorifice plug in root filled teeth. Materials and Methods: In this in vitro study , 70 single-rooted teeth with Type I canal system were used. Crowns were removed; then cleaning and shapping (step-back to) was done and canals were obturated with gutta-percha and AH26 sealer. Teeth were randomly divided into three experimental groups (n=20) and two negative and positive control groups (n=5). After placing the intraorfice plugs samples were submerged in Indiaink for 72 hours. These samples were longitudinally sectioned and were observed and penetration was measured under a stereomicroscope at *16. Data were analyzed with descriptive statistical methods and one-way ANOVA using SPSS/13 statistical software. Results: The mean penetration of Glass-ionomer, ProRoot MTA and Resilon was 0.69, 0.73 and 1.1, respectively. Resilon had statistically significant difference with MTA and Glass- ionomer(P0.05). Conclusions : Glass- ionomer and MTA are more effective than Resilon in preventation of coronal microleakage when used as intraorifice plug.