目的讨论正常者与错者在下颌极限运动时、咀嚼运动及磨牙时，髁突在矢状向与水平向移动的运动轨迹。

Objective To discuss the movement path of condylar limit movement in sagittal plane and horizontal plane between the normal occlusion and malocclusion.

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摘要目的筛选小鼠帽状期(E14.5)和钟状早期(E18.5)磨牙牙胚的差异表达基因。

Abstract: Objective To study the different gene expressions of cap stage (E14.5) and early bell stage (E18.5) in murine molar.

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