三种常用根管封闭剂的密封性比较

摘要

Objective To compare the sealing ability of three kinds of sealing materials (canal filling agent,AH plus and iRoot SP)in root canal therapy.Methods Thirty-nine newly extracted single-canal teeth were divided into three groups .The root canals were prepared using hand instruments ,and obturated with corresponding sealing materials by step -back technique.The sealing ability was e-valuated by dye penetration method .Results The mean dyeing length of root canal filling agent was significantly longer than AH plus and iRoot SP(P <0.05).Conclusion AH plus and iRoot SP have sealing ability that is better than root canal filling ? agent in root canal therapy.%目的：评价根管充填剂、AH plus 和 iRoot SP 三种根管封闭剂的根尖密封性。方法选择拔除的单根管牙39颗，按随机数字表法分为根管充填剂组、AH plus 组和 iRoot SP 组各13颗牙，手用器械逐步后退法进行体外根管预备后，采用冷牙胶侧方加压法对各组离体牙进行牙胶尖＋相应的根管封闭剂根管充填，使用染料渗透法检测各组染料渗透入根管内的长度，并进行比较。结果根管充填剂组根管内染色长度大于 AH plus 组和 iRoot SP 组，差异有统计学意义（P ＜0．05），AH plus组和 iRoot SP 组根管内染色长度差异无统计学意义。结论 AH plus 和 iRoot SP 根尖封闭性能相近，根管充填剂的根尖封闭性弱于 AH plus 和 iRoot SP。