Fluid transport and bacterial penetration along root canal fillings

摘要: Convective transport of water from the coronal to apical end obturated root canals was determined by movement an air bubble in a capillary glass tube connected apex experimental section using headspace pressure 120 kPa (1.2 atm). Water through existing voids could be measured reproducibly this way. The 60 human maxillary canines were filled with gutta-percha and sealer cold lateral condensation technique. Thirty these first exposed small motile bacterium, Pseudomonas aeruginosa, growing reservoir at each root. After 50 days, two specimens allowed penetration bacteria end. All roots then assessed quantitatively for convective water. results divided into three defined categories: 39 'bacteria tight' category, 14 'slight leakage' 7 'gross category. that showed bacterial fell slight gross leakage categories. previous test passage did not statistically influence fluid pattern which subsequently. These findings indicate fluids canals, most do allow bacteria.