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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并以大量的插图、表格直观地表现这三种不同矢高比时结构的内力特征。

And displays the structure endogenic force characteristic of these three kinds of different vector high ratio intuitively by the massive illustrations and forms.

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研究表明，通过借助于矢阵概念，在涉及多个坐标系时，张量的相对导数得到了更加清晰和严格地描述。

It was shown that with the help of vectrix one can treat the relative derivatives of a tensor more clearly and more rigorously when multiple reference frames were concerned.

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