OBJECTIVES: The sealing properties of a one-step obturation post-placement technique consisting of Resilon-capped fibre post-obturators were compared with a two-step technique based on initial Resilon root filling following by 24h-delayed fibre post-placement. METHODS: Thirty root segments were shaped to size 40, 0.04 taper and filled with: (1) InnoEndo obturators; (2) Resilon/24h-delayed FibreKor post-cementation. Obturator, root filling and post-cementation procedures were performed using InnoEndo bonding agent/dual-cured root canal sealer. Fluid flow rate through the filled roots was evaluated at 10psi using a computerised fluid filtration model before root resection and after 3 and 9mm apical resections. Fluid flow data were analysed using two-way repeated measures ANOVA and Tukey test to examine the effects of root-filling post-placement techniques and root resection lengths on fluid leakage from the filled canals (alpha=0.05). RESULTS: A significantly greater amount of fluid leakage was observed with the one-step technique when compared with two-step technique. No difference in fluid leakage was observed among intact canals and canals resected at different lengths for both materials. CONCLUSIONS: The seal of root canals achieved with the one-step obturator is less effective than separate Resilon root fillings followed by a 24-h delay prior to the fibre post-placement. Incomplete setting of the sealer and restricted relief of polymerisation shrinkage stresses may be responsible for the inferior seal of the one-step root-filling/post-restoration technique.
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|Titolo:||Sealing properties of one-step root-filling fibre post-obturators vs. two-step delayed fibre post-placement.|
|Rivista:||JOURNAL OF DENTISTRY|
|Citazione:||Monticelli, F., Osorio, R., Toledano, M., Ferrari, M., Pashley, D.h., & Tay, F.r. (2010). Sealing properties of one-step root-filling fibre post-obturators vs. two-step delayed fibre post-placement. JOURNAL OF DENTISTRY, 38(7), 547-552.|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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