论文部分内容阅读
３９名中老年正常与３０名青年正常的软组织Ｘ线头测量对比研究表明，成人随年龄增加，上唇变薄变长，而下颌唇颏部软组织增厚，使唇颏侧貌外形发生明显改变
Compared with the soft tissue X-ray measurement of 39 middle-aged and elderly normal subjects and 30 normal young adults, the upper lip became thinner and longer with the increase of age, while the thickened soft tissue of mandibular lip and chin significantly changed the profile of lip-chin