title: Microleakage of a new and an old Kerr root canal sealers.
abstract: This study sought to evaluate the microleakage of two Kerr root canal sealers (old and new formulas of the Pulp Canal Sealer). Sixty anterior teeth were used. After cleaning and shaping to a size 30 file, the teeth were obturated with the vertical condensation of gutta-percha with either the old or the new root canal sealer. Apical microleakage was determined using pressurized fluid filtration at 90 min, 1 day, and 1, 4, 12, 18, and 24 wk after root canal obturation. The results showed that leakage tended to increase over time for the two groups. Also, no significant difference was found in microleakage between the old and the new formulas of the root canal sealer.
authors.affiliation: Department of Oral Fundamental Sciences, Dental School, Lebanese University, Beirut, Lebanon.
authors.forename: F B
authors.initials: FB
authors.lastname: Dagher
authors.forename: G M
authors.initials: GM
authors.lastname: Yared
authors.forename: P
authors.initials: P
authors.lastname: Machtou
mesh_terms: D000704:Analysis of Variance; D016001:Confidence Intervals; D003763:Dental Leakage / Q000517:prevention & control*; D004395:Dye Dilution Technique; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing / Q000706:statistics & numerical data; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D013997:Time Factors; D015035:Zinc Oxide-Eugenol Cement / Q000627:therapeutic use*
chemical_list: D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C076543:Kerr Pulp Canal Sealer