患儿，女，5岁，因前牙"暴牙齿"求诊。检查：上牙弓狭窄，上前牙前突，开唇露齿，并伴有局部小开，示指弯曲可见胼胝，鼻腔通畅。造成该患儿牙畸形的病因是...

作者: rantiku 人气: - 评论: 0

问题患儿，女，5岁，因前牙"暴牙齿"求诊。检查：上牙弓狭窄，上前牙前突，开唇露齿，并伴有局部小开，示指弯曲可见胼胝，鼻腔通畅。造成该患儿牙畸形的病因是

选项 A．咬下唇 B．咬上唇 C．偏侧咀嚼 D．吮颊 E．吮指

答案 E

解析

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