Department of Endodontics, Kocaeli University Faculty of Dentistry, Kocaeli, Turkey.
Department of Prosthodontics, Kocaeli University Faculty of Dentistry, Kocaeli, Turkey.
J Prosthodont. 2018 Oct;27(8):771-774. doi: 10.1111/jopr.12575. Epub 2017 Jan 9.
To compare two fiber post removal techniques in terms of fracture resistance and time required for post removal.
Post space was prepared to a 9-mm depth in each root canal. The roots were randomly divided into three groups of 15 specimens each. D.T. Light-Posts were cemented in all groups. In group 1, fiber posts were removed using the D.T. Light-Post-removal kit; in group 2, Start-X stainless-steel ultrasonic tips were used. In group 3, fiber posts were left without removal (the control group). For all groups, fracture resistance (N) value was measured and recorded using a universal testing machine. Times required for fiber post removal were also recorded for the two study groups.
There was no significant difference between the control and removal kit groups for fracture resistance values (p = 0.233). The fracture resistance value of the ultrasonic group was found to be significantly lower than that of the control group (p = 0.001) as well as that of the removal kit group (p = 0.032). The fiber post removal time for the ultrasonic group was significantly longer than that for the removal kit group (p < 0.001).
Compared to the removal kit, removal of the fiber posts with an ultrasonic tip decreases the fracture resistance of the roots, although significantly more time is required.
比较两种纤维桩取出技术在抗折强度和取出时间方面的差异。
在每个根管中预备 9 毫米深的桩腔。将根随机分为三组，每组 15 个标本。所有组均用 D.T. Light-Post 黏固纤维桩。在第 1 组中，使用 D.T. Light-Post 取出套件取出纤维桩；在第 2 组中，使用 Start-X 不锈钢超声尖端。在第 3 组中，纤维桩不取出（对照组）。使用万能试验机测量并记录所有组的抗折强度（N）值。还记录了两个研究组取出纤维桩所需的时间。
抗折强度值在对照组和取出套件组之间无显著差异（p = 0.233）。与对照组（p = 0.001）和取出套件组（p = 0.032）相比，超声组的抗折强度值明显较低。超声组取出纤维桩的时间明显长于取出套件组（p < 0.001）。
与取出套件相比，使用超声尖端取出纤维桩会降低根的抗折强度，尽管需要的时间明显更长。
