Last premolar of upper jaw, first molar of lower jaw.

上颚最后的一只前臼齿，下颚最前的一只臼齿。

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Carnassial: Last premolar of upper jaw, first molar of lower jaw.

裂齿：上颚最后的一只前臼齿，下颚最前的一只臼齿。

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Objective: to investigate the type of upper second molar malocclusion and its related-factors.

目的：探讨上颌第二磨牙错？畸形的种类及相关因素。

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Objective: to investigate the type of upper second molar malocclusion and its related-factors.

目的：探讨上颌第二磨牙错？畸形的种类及相关因素。

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