题目内容

男,38岁。右上第一磨牙牙髓治疗后劈裂,拔牙过程中牙冠碎裂至龈下,牙根与周围骨质粘连。拔牙过程中发现其腭侧根消失,牙槽窝空虚,此时应当()

A. 立即停止操作,拍X线片
B. 立即扩大牙槽窝取根
C. 立即行上颌窦开窗取根
D. 翻瓣去骨取根
E. 延期拔除患牙

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