Department of Endodontics, Faculty of Dentistry, Trakya University, Edirne, Turkey.
Department of Prosthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
J Adv Prosthodont. 2015 Feb;7(1):15-20. doi: 10.4047/jap.2015.7.1.15. Epub 2015 Feb 17.
The aim of this study was to evaluate whether the push-out bond strength varies between oval and circular fiber posts, and to examine the effect on the resin cement thicknesses around the posts.
Eighteen mandibular premolar roots were separated into two groups for oval and circular fiber posts systems. Post spaces were prepared and fiber posts were luted to the post spaces. Roots were cut horizontally to produce 1-mm-thick specimens. Resin cement thicknesses were determined with a metallographic optical microscope and push-out tests were done.
No significant differences were observed in terms of push-out bond strength between the oval and circular fiber posts (P>.05) The resin cement thicknesses of the oval posts were greater than those of the circular posts group in the coronal, middle and apical specimens (P<.05).
In the light of these results, it can be stated that resin cement thickness does not affect the push-out bond strength.
本研究旨在评估椭圆形和圆形纤维桩的推出强度是否存在差异，并研究这种差异对桩周围树脂水门汀厚度的影响。
将 18 颗下颌前磨牙牙根分为椭圆形和圆形纤维桩系统两组。预备桩道并将纤维桩粘接到桩道中。将牙根水平切割以产生 1-mm 厚的样本。使用金相光学显微镜确定树脂水门汀厚度，并进行推出测试。
在推出粘结强度方面，椭圆形和圆形纤维桩之间没有观察到显著差异（P＞.05）。在冠、中、根尖标本中，椭圆形桩的树脂水门汀厚度大于圆形桩组（P＜.05）。
根据这些结果，可以得出结论，树脂水门汀厚度不会影响推出粘结强度。
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