【单选题】【消耗次数：1】
最常见的栓子是
①
血栓栓子
②
空气栓子
③
细菌栓子
④
肿瘤栓子
参考答案：
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【单选题】
（）空气进入牙本质小管深部，牙本质粘接剂将空气封入牙本质小管而形成空气栓子
①
牙本质过度酸蚀
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牙本质过度湿润
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边缘不密合
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牙本质过度吹干
⑤
牙本质酸蚀不够
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