Effects of pressure and measurement time on the fluid filtration method inendodontics

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 l eakage 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 flui d flow expressed as mul min(-1) decreased with an increased measurement tim e (p = 0.001) and was higher in the high pressure group (p = 0.001), The fl uid flow of this study, where ail of the teeth were filled with the same te chnique, ranged from 3.8 x 10(-5) mul min(-1) cm H2O-1 to 43 x 10(-5) mul m in(-1) cm H2O-1, depending on the pressure and measurement time. This shows the need for standardization to compare the results from various studies.