患者，男11岁，左右上下颌第一磨牙呈反<img src="/Image1/41/416d70c5ce8bf1e24cd865a81ac5ece8.jpg" />、<img src="/Image1/81/81371f46a40bc6fdfc114efb2a720c9c.jpg" />缺失，上颌后缩，下颌前突，前牙反<img src="/Image1/41/416d70c5ce8bf1e24cd865a81ac5ece8.jpg" />，面中1／3凹陷，下颌可后退至对刃。X线可见，<img src="/Image1/81/81371f46a40bc6fdfc114efb2a720c9c.jpg" />龈下3mm阻生，<img src="/Image1/b6/b6ea59682c77e9c59496f8c99ffae4d7.jpg" />之间各3mm间隙。对埋伏的<img src="/Image1/81/81371f46a40bc6fdfc114efb2a720c9c.jpg" />如何处置（）<br>A:拔除<br>B:不处理，等待其自行萌出<br>C:开窗术外露<img src="/Image1/81/81371f46a40bc6fdfc114efb2a720c9c.jpg" /><br>D:拔除<img src="/Image1/19/19fc29409f8325d06c0bc479de5d7d34.jpg" />，为<img src="/Image1/81/81371f46a40bc6fdfc114efb2a720c9c.jpg" />萌出准备间隙<br>E:以上都不对