Objective To investigate the root and canal morphology of extracted maxillary second premolars.
目的观察上颌第二前磨牙的牙根及根管形态。
Objective: the three-dimensional finite element method models of the maxillary second molar was constructed.
目的：建立人上颌第二磨牙三维有限元模型。
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。
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