题目：
下列哪些步骤不是牙本质钉修复和根管钉修复的共有步骤？（）
A.根管治疗
B.钉道预备
C.钉就位
D.充填材料修复
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
下列哪些步骤不是牙本质钉修复和根管钉修复的共有步骤？（） A.根管治疗 B.钉道预备
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