患者，男性，32岁，近几个月以来感左上后牙轻度松动，咬合不适，无明显疼痛。检查：面不
题型：单项选择题
问题：
患者，男性，32岁，近几个月以来感左上后牙轻度松动，咬合不适，无明显疼痛。检查：面不均匀磨耗，左上6松动Ⅰ度，牙周探诊深度为3mm，探及少许龈下结石，X线片示近远中牙周韧带增宽，未见牙槽骨吸收。造成患牙松动的最可能原因为()
A．牙周炎
B．外伤
C．急性龈炎
D．创伤
E．牙周韧带的急性炎症
题型：单项选择题
根据表格内容，完成对话。
A: Welcome l _8 :00 0'clock Weekend Talk, Ron.
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