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上颌磨牙近颊多存在第2根管(MB2),然而临床上MB2的发现率却较低,常常由于根管遗漏而造成根管治疗失败。本文报告2例上颌磨牙MB2根管遗漏病例,总结分析MB2根管遗漏原因以及临床上避免MB2遗漏的方法。
The maxillary molar buccal second tube (MB2), but the clinical discovery of MB2 is low, often due to root canal omission caused by root canal treatment failed. This article reports 2 cases of omission of maxillary molar MB2 root canal, summarizes the reasons of omission of MB2 root canal and the method of avoiding MB2 omission clinically.