目的探索C形根管系统的最佳充填方法。方法 收集各种原因拔除的下颌第二磨牙共90颗,对确诊为C形根管系统的32颗离体牙分组并用不同的方法充填,检测充填的密实性和根尖封闭效果。结果热牙胶充填的染色线长度最短,与其他两组相比有统计学意义。结论热牙胶充填的渗漏最少,充填效果最好。 Objective To explore the best filling method of C-shaped root canal system. Methods A total of 90 mandibular second molar extracted from various causes were collected. 32 dental implants diagnosed as C-shaped root canal system were divided into groups and filled with different methods to test the density and apical sealing effect. Results The length of stained dentin filling was the shortest, which was statistically significant compared with the other two groups. Conclusions The hot dentin filling has the least leakage and the best filling effect.