第一磨牙的磨耗程度最重，第三磨牙的磨耗程度最轻。
The first molar has the most serious tooth wear and the third molar was the lightest.
结果：随着磨耗程度的加重，髁状突表面的应力增加较多。
Results: the stresses on the surface of the condyle increased obviously as the tooth wear aggravated.
结果新石器时期人类牙齿的平均磨耗级别是3.88级，磨耗程度第一磨牙大于第二磨牙、大于第三磨牙。
Results the average attrition gradation of the teeth in Neolithic population was 3.88. The attrition degree of the first molar was greater than that of the second!
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