title: Influence of the removal of coronal gutta-percha on the seal of root canal obturations.
abstract: The purpose of this study was to compare the quality of the coronal seal of lateral and vertical condensations after removal of the coronal gutta-percha with two different techniques. One hundred single-rooted human teeth with one root canal were used. After cleaning and shaping, the teeth were divided into 4 equal groups. In groups 1, 3 and 2, 4 vertical and lateral condensations were performed respectively. Then, the coronal portion of gutta-percha was removed with heat-carriers alone for groups 1 and 2 and with heat-carriers and compaction for groups 3 and 4. Apical microleakage was determined using pressurized fluid filtration measured at different time intervals up to 24 wk. The results showed that the alternation of heat-carriers and compaction enhances the quality of the coronal seal. The obturation with the vertical condensation technique resulted in a better seal independently of the gutta-percha removal technique.
authors.affiliation: Department of Research, Dental School, Lebanese University, Beirut, Lebanon.
authors.forename: G M
authors.initials: GM
authors.lastname: Yared
authors.forename: F B
authors.initials: FB
authors.lastname: Dagher
authors.forename: P
authors.initials: P
authors.lastname: Machtou
mesh_terms: D000704:Analysis of Variance; D003763:Dental Leakage / Q000517:prevention & control*; D006171:Gutta-Percha; D006801:Humans; D019233:Retreatment; D012389:Root Canal Obturation / Q000379:methods*; D019228:Tooth Crown
chemical_list: D006171:Gutta-Percha