Nielsen Benjamin A, Baumgartner J Craig
Department of Endodontology, Oregon Health & Science University, 611 Campus Drive, Portland, OR 97239-3097, USA.
J Endod. 2006 Jan;32(1):52-4. doi: 10.1016/j.joen.2005.10.011.
Resilon, a thermoplastic, polyester polymer-based filling material, is a new material used for sealing root canals after chemomechanical preparation. The purpose of this in vitro study was to compare nickel-titanium (NiTi) spreader penetration in root canals having a .04 taper preparation using .02 and .04 tapered master gutta-percha cones and .02 and .04 tapered master Resilon cones. Twenty canals, from extracted human teeth, were cleaned and shaped to a standardized 40/.04 size. Master cones of .02 or .04 tapered gutta-percha and .02 or .04 tapered Resilon were placed in each canal. A fine-fine NiTi spreader was then placed next to the master cone with a 1.5-kg force. The penetration depth was measured, subtracted from working length, and recorded. A significant difference in penetration depth (p < 0.01) was found for both taper of the cone and material used. The depth of spreader penetration from greatest to least was .02 tapered Resilon, .02 tapered gutta-percha, .04 tapered Resilon, and .04 tapered gutta-percha.
Resilon是一种基于热塑性聚酯聚合物的充填材料，是一种在化学机械预备后用于封闭根管的新材料。本体外研究的目的是比较镍钛（NiTi）推压器在采用0.02和0.04锥度预备的根管中的穿透情况，使用的是0.02和0.04锥度的主牙胶尖以及0.02和0.04锥度的主Resilon尖。从拔除的人牙中选取20个根管，清理并预备成标准化的40/.04规格。将0.02或0.04锥度的牙胶尖以及0.02或0.04锥度的Resilon尖放入每个根管中。然后以1.5千克的力将一根极细的NiTi推压器放置在主尖旁边。测量穿透深度，从工作长度中减去该深度并记录。发现锥度和所用材料的穿透深度均存在显著差异（p < 0.01）。推压器穿透深度从大到小依次为：0.02锥度的Resilon、0.02锥度的牙胶尖、0.04锥度的Resilon、0.04锥度的牙胶尖。
