活髓切断术A．去冠髓留根髓B．去冠髓及少许根髓C．去冠髓及大部分根髓D．去除全部牙髓并扩大根管单选题

作者: rantiku 人气: - 评论: 0

问题活髓切断术

选项 A．去冠髓留根髓 B．去冠髓及少许根髓 C．去冠髓及大部分根髓 D．去除全部牙髓并扩大根管单选题

答案 A

解析

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