Goa Dental College and Hospital, Bambolim, Goa, India.
J Endod. 2011 Jun;37(6):828-31. doi: 10.1016/j.joen.2011.02.024. Epub 2011 Apr 2.
There have been varied results from studies comparing postendodontic fracture resistance between teeth obturated with Resilon or gutta-percha. This study was performed to evaluate the fracture resistance of roots obturated by using Resilon (RealSeal system) or gutta-percha (with AH Plus sealer).
Eighty extracted human mandibular single-rooted premolars stored in 10% formalin were used in the study. They were prepared by using a crown-down technique, debrided with NaOCl, ethylenediaminetetraacetic acid, and sterile water and divided into 4 groups. Obturation was performed by using the lateral condensation method. The negative control group consisted of unfilled specimens, and the positive control group consisted of those obturated with flowable, dual-cure composite resin. All root specimens were stored for 2 weeks in 100% humidity to allow complete setting of the sealer. Each specimen was mounted in acrylic in a polyvinyl ring and tested for fracture resistance with the Universal testing machine. The loading fixture of the machine was mounted with its spherical tip aligned with the center of the canal opening of each root. A vertical loading force was applied until it fractured the root. The force values were subjected to statistical analysis including analysis of variance and Fisher least significant difference testing.
Teeth obturated with Resilon were more resistant to fracture than those obturated with gutta-percha. The difference was found to be highly significant (P=.00001).
Resilon increased the resistance to fracture of single-rooted teeth in vitro.
比较使用 Resilon 或牙胶根充后的牙齿在后牙根管治疗后抗折能力的研究结果各有不同。本研究旨在评估使用 Resilon（RealSeal 系统）或牙胶（与 AH Plus 封剂一起）根充后的牙齿的抗折能力。
本研究使用 80 颗储存于 10％甲醛中的下颌单根前磨牙。采用逐步深入技术进行根管预备，用次氯酸钠、乙二胺四乙酸和无菌水进行根管冲洗和根管荡洗，然后将其分为 4 组。使用侧向加压法进行根管充填。阴性对照组为未填充的标本，阳性对照组为使用可流动双固化复合树脂填充的标本。所有根样本在 100％湿度下储存 2 周，以允许密封剂完全凝固。将每个样本用丙烯酸树脂固定在聚氯乙烯环中，并使用万能试验机测试其抗折能力。试验机的加载夹具的球形尖端与每个根管开口的中心对齐，然后对样本施加垂直加载力，直到根折裂。对力值进行统计分析，包括方差分析和 Fisher 最小显著差异检验。
与牙胶根充的牙齿相比，使用 Resilon 根充的牙齿具有更高的抗折能力。差异具有统计学意义（P=.00001）。
Resilon 体外增加了单根牙的抗折能力。
