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【单选题】
对于拔牙适应证，下列陈述正确的是A.
外伤移位严重或脱位的牙应拔除
B.
所有的残根均应拔除
C.
髓腔壁吸收过多，穿通，容易发生病理性折断的牙应拔除
D.
所有颌骨骨折或牙槽突骨折累及的牙，均应拔除
E.
所有的埋伏牙均应拔除
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