三种桩核系统对增强喇叭口根管抗折性能的研究

The fracture resistance of flared root canal tooth restored with three different post systems

目的比较三种不同桩核系统修复喇叭口根管后的抗折性能。方法选择30颗因正畸拔除的下颌第一前磨牙,常规根管治疗后截冠形成喇叭口状外形。随机分成3组,分别行钴铬合金、单支纤维桩、纤维主辅桩桩核冠修复。将所有样本包埋后,用电子力学试验机施加载荷,进行抗折性能测试。结果牙根抗折强度钴铬合金组小于单支纤维桩组和纤维主辅桩组(P<0.05),单支纤维桩组小于纤维主辅桩组(P<0.05)。结论在喇叭口根管修复中,应用纤维主辅桩组修复临床效果较好。

Objective ： To compare the fracture resistance of flared root canal restored with three different post systems. Methods： Thirty extracted mandibular premolars were endodontically treated before crown truncation, and then were ran- domly divided into three groups. Each group teeth were restored with Co-Cr alloy, alone fiber and fiber post combined with accessory post systems differently. The fracture resistance test was done with universal material testing machine by all the specimens. Results： The fracture resistance strength of flared root canal teeth restored with Co-Cr alloy systems group was lower than fiber alone and fiber post combined with accessory post（ P 〈 0. 05 ）, fiber alone was lower than fiber post com- bined with accessory post（P 〈 0.05 ）. Conclusion： The fiber post combined with accessory post is recommended in flared root canal tooth restoration.