Maxillary first molars 上颌第一磨牙
Objective To investigate the clinical discovery and expanding of the second mesiobuccal canal (MB2) in maxillary first molars.
目的探讨在临床上上颌第一磨牙近中颊根第二根管(MB 2)的发现及扩通。
Objective: to study the anatomy of the maxillary first permanent molars.
目的：了解上颌第一恒磨牙牙体解剖基础知识。
Aim To investigate the clinical incidence of the second mesiobuccal root canal of maxillary first molars.
目的研究上颌第一磨牙近中颊根第二根管的临床发现率。
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