Department of Endodontology, Oregon Health and Science University, Portland, Oregon 97201, USA.
J Endod. 2010 Feb;36(2):318-21. doi: 10.1016/j.joen.2009.10.026. Epub 2009 Dec 14.
The purpose of this study was to evaluate the push-out bond strengths of different obturating materials.
Forty single-rooted human extracted teeth were used in this study. The teeth were instrumented and irrigated by using 5.25% NaOCl, 15% ethylenediaminetetraacetic acid, and sterile water. The teeth were then filled with Resilon/RealSeal, Resilon/RealSeal SE, Resilon/MetaSeal , or gutta-percha/Kerr EWT sealer. The roots were then sectioned into 1-mm-thick slices and subjected to vertical loading to displace the obturating material toward the coronal side of the slice. The bond strength was then calculated and subjected to statistical analysis. Slices were examined by using a stereomicroscope at 30x to determine the mode of failure.
The mean push-out bond strengths were as follows: Resilon/RealSeal, 1.45 +/- 0.99 MPa; RealSeal SE, 0.88 +/- 0.49 MPa; Resilon/MetaSeal, 2.41 +/- 1.7 MPa; and gutta-percha/Kerr EWT sealer, 2.32 +/- 0.74 MPa.
The push-out bond strengths of Resilon/MetaSeal and gutta-percha/Kerr EWT were significantly (P < .05) higher than either Resilon/RealSeal or Resilon/RealSeal SE. Resilon/MetaSeal and gutta-percha/Kerr EWT did not differ significantly.
本研究旨在评估不同根管封闭材料的推出强度。
本研究共使用 40 颗单根人离体牙。使用 5.25%次氯酸钠、15%乙二胺四乙酸和无菌水对牙齿进行器械和冲洗。然后使用 Resilon/RealSeal、Resilon/RealSeal SE、Resilon/MetaSeal 或牙胶/Kerr EWT 封固剂填充牙齿。然后将牙根切成 1 毫米厚的切片，并进行垂直加载，以使封闭材料向切片的冠侧移位。然后计算粘结强度并进行统计分析。用体视显微镜在 30x 下检查切片，以确定失效模式。
推出粘结强度的平均值如下：Resilon/RealSeal，1.45 ± 0.99 MPa；RealSeal SE，0.88 ± 0.49 MPa；Resilon/MetaSeal，2.41 ± 1.7 MPa；牙胶/Kerr EWT 封固剂，2.32 ± 0.74 MPa。
Resilon/MetaSeal 和牙胶/Kerr EWT 的推出粘结强度明显（P<.05）高于 Resilon/RealSeal 或 Resilon/RealSeal SE。Resilon/MetaSeal 和牙胶/Kerr EWT 之间没有显著差异。
