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guo ren ding jian gu de guan cha
Author(s): 
Pages: 247-252+306
Year: Issue:  3
Journal: Acta Anthropologica Sinica

Keyword:  顶间骨枕横裂上项线最上项线;
Abstract: 观察1600个成入颅骨,顶间骨出现率为2.94%,皆在枕骨上项线上方,其中27.69%与最上项线交叉。观察60例7—38周龄胎颅的枕鳞上部以两个骨化中心进行膜内化骨的情况。本文认为顶间骨的形成是由于枕横裂未融合及异常骨化中心出现所致,并提出枕鳞上部与枕鳞下部之间的融合线位于上项线以上,而上项线和最上项线均不应认作是两部融合线的观点。
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