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: 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。
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