title: Effects of pressure and measurement time on the fluid filtration method in endodontics.
abstract: The purpose of this study was to evaluate the influence of the measurement time and the pressure on the outcome of a fluid filtration test. Thirty-six roots were prepared with a Profile device and filled with Thermafil. The leakage along the filling material was recorded under a 15 cm H2O pressure (n = 18) or a 150 cm H2O pressure (n = 18) at 3 min, 1 h, and 24 h. The fluid flow expressed as microl min(-1) decreased with an increased measurement time (p = 0.001) and was higher in the high pressure group (p = 0.001). The fluid flow of this study, where all of the teeth were filled with the same technique, ranged from 3.8 x 10(-5) microl min(-1) cm H2O(-1) to 43 x 10(-5) microl min(-1) cm H2O(-1), depending on the pressure and measurement time. This shows the need for standardization to compare the results from various studies.
authors.affiliation: Unité IMEB, Faculté d'Odontologie, Marseille, France.
authors.forename: L
authors.initials: L
authors.lastname: Pommel
authors.forename: J
authors.initials: J
authors.lastname: Camps
mesh_terms: D000704:Analysis of Variance; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification*; D006801:Humans; D011312:Pressure; D012212:Rheology; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation / Q000295:instrumentation; D013223:Statistics as Topic; D013499:Surface Properties; D013997:Time Factors; D014867:Water; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
chemical_list: D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D014867:Water