中年组与青年组相比，下颌骨长度明显缩短，而老年组与中年组相比，颌骨高度下降并不明显。
Jaw length decreases significantly in comparisons between the young and middle age groups, whereas the decline in jaw height from the middle to old group was noteworthy.
方法：检查了23例干燥下颌骨标本，测量了舌侧管的数目、位置、管口直径、长度和走向。
Methods: On23dry mandibles, the number, location, diameter, length and direction of lingual vascular canals were measured.
研究人员利用电脑程序对每张扫描图颌骨的长度、宽度及下颌角进行了测量，并对各组进行了比较。
Researchers used a computer program to measure the length, width, and Angle of the mandible, or jaw bone, for each scan, and compare the results for each group.
研究人员利用电脑程序对每张扫描图颌骨的长度、宽度及下颌角进行了测量，并对各组进行了比较。
Researchers used a computer program to measure the length, width, and Angle of the mandible, or jaw bone, for each scan, and compare the results for each group.
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