问题
单项选择题
患者，女，52岁，
缺失，行固定义齿修复，46为基牙。1年后基牙有跳痛。其主要原因为（）
A．咬合早接触
B．牙周膜损伤
C．咬合力大
D．末端侧下沉
E．设计不合理
答案
参考答案：B
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患者，女，52岁，缺失，行固定义齿修复，46为基牙。1年后基牙有跳痛。其主要原因为（）
A．咬合早接触
B．牙周膜损伤
C．咬合力大
D．末端侧下沉
E．设计不合理
参考答案：B
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