为了基托均匀分散牙合力，这需要两侧上下颌尽可能多的人工牙在相互滑动的过程中有接触关系。

For the forces to be distributed throughout the denture bases, there need to be contacts between as many teeth as possible as they glide over each other, and on both sides of the arch.

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磨耗速率的组内、组间差异与上下颌牙齿咬合关系、口腔咀嚼生理以及不同经济文化古人群的食物构成等差异有关。

The reason for these may be the occlusal relationships of upper and lower molars, dental physiological function of the teeth, and the difference in economic subsistance between the groups.

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背景：正确评价上下颌骨基骨的矢状位置关系在正畸患者的诊断和治疗过程中是十分重要的。

BACKGROUND: it is very important to appreciate the Sagittal discrepancy during the diagnosis and therapy in orthodontics patients.

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