目的:探讨活髓牙及死髓牙对根尖探测仪准确性的影响.方法:选择需进行根管治疗的患牙221颗,根据牙髓的活力分为根管活髓牙组及根管死髓牙组,采用ROOT-SW根尖探测仪测定根管工作长度后,带针拍摄X线牙片以了解其准确性.结果:根管死髓牙组的准确率为92.1%,根管活髓牙组的准确率为76.5%,两组间准确率相比具有显著性差异(P＜0.01).结论:牙髓活力明显影响根尖探测仪准确性.

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