患者，女，18岁，面部检查，无明显的异常，覆<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />10mm，覆盖2mm，上颌<img src="/Image1/92/92cd46b79bea5ac3c87be3a8ac3c1c31.jpg" />和下颌<img src="/Image1/aa/aa9fd84bd2dc5319a47bb83438d1a08f.jpg" />开<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />，四个第一磨牙轻度Ⅲ类咬合关系，牙弓无拥挤，FMA42°下颌角141．5°，下颌支高度偏短。四个第一磨牙牙胚存在。有吮指习惯。本患者错<img src="/Image1/20/209d039037793a279d79976fa8299152.jpg" />类型是（）<br>A:安氏Ⅱ类错<img src="/Image1/20/209d039037793a279d79976fa8299152.jpg" /><br>B:牙列拥挤<br>C:安氏Ⅲ类错<img src="/Image1/20/209d039037793a279d79976fa8299152.jpg" /><br>D:开<img src="/Image1/20/209d039037793a279d79976fa8299152.jpg" /><br>E:安氏Ⅱ类错<img src="/Image1/20/209d039037793a279d79976fa8299152.jpg" />伴有上颌前突及牙列高度拥挤者