不同根管充填方法对椭圆形根管根尖封闭效果的影响

摘要

Objective To evaluate the apical sealing ability of different obturationtechniques in oval⁃root canals. Methods After root canals shaping with Mtwo instruments, 42 premolars with oval⁃root canals were randomly divided into 3 groups of 14 teeth each. Group A wereobturated by single⁃cone technique. Group B were obturated by modified continuous wave condensation technique. Group A were obturated by lateral condensation. IRoot SP was used as root ca⁃nal sealer in all groups. The apical leakage was evaluated by dye penetration method and transparent teeth technique. Results Mean depth of leakage was (1.34 ± 0.33) mm for group A, (0.84 ± 0.40) mm for group B and (1.13 ± 0.33) mm for group C. There was significant difference between group A and group B (P=0.004). while no significant differ⁃ence was found between group A and group C (P=0.198), group C and group C (P=0.072). Conclusion The oval⁃root canalobturated withmodified continuous wave condensation withiRoot SP as sealercan get a goodapical sealing ability.%目的：采用染料渗透法和透明牙技术观察不同根管充填方法对椭圆形根管根尖封闭效果的影响。方法42颗椭圆形根管的离体前磨牙经机用镍钛锉完成根管预备后，随机分成3组，每组14颗牙，以iRoot SP作为根管封闭剂，分别采用单尖充填法（A组）、改良热牙胶连续波垂直加压充填法（B组）和冷牙胶侧方加压充填法（C组）完成根管充填，通过根尖染料渗透实验和透明牙技术，观察根尖微渗漏情况。结果 A组染料渗入深度为（1.34±0.33）mm，B组染料渗入深度为（0.84±0.40）mm，C组染料渗入深度为（1.13±0.33）mm， A组与B组染料渗入深度的差异具有统计学意义（P=0.004），A组与C组、B组与C组间差异均无统计学意义（P=0.198和P=0.072）。结论以iRoot SP作为根管封闭剂，改良热牙胶连续波垂直加压充填法充填根管可以使椭圆形根管获得更好的根尖封闭效果。