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兔唇不长牙齿吗
更新时间: 2020-11-08 00:00:00  

兔唇长牙齿,唇裂是口腔颌面部常见的先天性畸形,发生率约为1:1000。正常的胎儿,在第五周以后开始由一些胚胎突起逐渐互相融合形成面部,如未能正常发育便可发生畸形,其中包括唇裂。

1、遗传因素

唇裂的患者可发现在其直糸亲属或旁糸亲属中也有类似的畸形发生,因而认为唇裂畸形与遗传有一定的关糸。遗传学研究还认为唇裂属于多基因遗传性疾病。

2、环境因素

在妊娠前三个月内,当母体的生理状态受到侵袭或干扰时,就可能影响胚胎颌面部的生长发育。如营养缺乏、感染、药物因素、物理损伤和烟酒等。

关键词: 兔唇 牙齿

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