题目内容

患者，男，11岁，下颌面部呈相对后退位，口唇闭合呈现口唇肌肉紧张，覆牙合5mm，覆盖9mm，四个第一磨牙Ⅱ类牙合关系，上前牙拥挤明显，ANB为100°，SNA为845°，X线片显示四个第三磨牙存在，下颌Spee曲线明显。
对此患者应诊断为

A. 安氏Ⅰ类错胎
B. 安氏Ⅱ类Ⅰ分类
C. 安氏Ⅱ类Ⅱ分类
D. 安氏Ⅲ类错牙合
E. 安氏Ⅲ类Ⅱ分类

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