Gelfand M
Department of Endodontics, Faculty of Dentistry, University of Toronto, Ont.
J Can Dent Assoc. 1992 Aug;58(8):665-6, 669-70.
Post and core systems anchored and supported by endodontic files, Para Posts, Boston Posts and Flexi Posts were subjected to tensile testing in an Instron testing machine. All forces were applied to the cores until the post-core system was removed. The test results revealed no statistically significant difference among post and core systems built up with Para Posts, Boston Posts or Flexi Posts. The endodontic files proved to be significantly less retentive than the other post systems evaluated. Under the conditions of this study, the use of endodontic files as retentive posts is not supported.
对由根管锉、Para桩、Boston桩和Flexi桩固定和支撑的桩核系统在英斯特朗试验机上进行拉伸测试。所有力均施加于桩核上，直至桩核系统脱离。测试结果显示，用Para桩、Boston桩或Flexi桩构建的桩核系统之间无统计学显著差异。事实证明，根管锉的固位力明显低于所评估的其他桩系统。在本研究条件下，不支持将根管锉用作固位桩。
