J Endod:不同窝洞设计和暂封材料对上颌前磨牙抗折裂的影响

2019-04-18 lishiting MedSci原创

这篇研究的目的是为了评估上颌前磨牙经过根管治疗后使用4种不同暂封材料对其抗折裂强度的影响。

这篇研究的目的是为了评估上颌前磨牙经过根管治疗后使用4种不同暂封材料对其抗折裂强度的影响。

研究选取120颗拔除的上颌前磨牙。8颗完整并作为阴性对照。剩余牙齿按照2种不同方法设计预备近远中临合面窝洞(组1宽度为牙近间距离的1/3和组2宽度为牙尖间距离的2/3)。随后,制备牙髓入路窝洞并使用Revo-S旋转锉(MicroMega, Besancon, France)进行根管预备。而后,选取含组1和组2各8颗牙齿的共16颗牙齿作为阳性对照,不充填任何暂封材料。牙齿按照不同的暂封材料再随机分为4个亚组(n = 12): Cavit G (3M ESPE, St Paul, MN), Coltosol F (Coltène/Whaledent AG, Altstätten, Switzerland), Intermediate Restorative Material (Dentsply Sirona, Konstanz, Germany), or DiaTemp (DiaDent Europe BV, Almere, Netherlands)。使用通用测试机对每个样本进行抗折断测试直至样本断裂。记录每个样本折断的强度,数据进行统计学分析。

结果显示,与其他组相比,阴性对照组表现出最高的抗折断性能值,而阳性对照组则表现为最低。在不考虑窝洞宽度下,对经根管治疗的上颌前磨牙施以暂封材料Cavit G, Intermediate Restorative Material, Coltosol F和DiaTemp对牙齿抗折断强度没有明显差异(P > .05)。

结论:窝洞设计是影响根管治疗上颌前磨牙的抗折断性能的有效因素。而临时充填材料对其没有影响。

原始出处:

Balkaya H, Topçuoğlu HS, et al. The Effect of Different Cavity Designs and Temporary Filling Materials on the Fracture Resistance of Upper Premolars. J Endod. 2019 Mar 14. pii: S0099-2399(19)30046-9. doi: 10.1016/j.joen.2019.01.010.

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