结果根管治疗失败的主要原因为根管继发感染、根尖超填及根尖周机械损伤。
Results Secondary infection of the root tubes , apex overfilled and peripheral mechanical injury were main failure factors in the treatment of root tubes .
而对病变形态、边界、继发改变及其与周旧结构的关系及病变的整体判断优于A超。
But to the pathological change shape, the boundary, following sends the change and surpasses a with the week old structure relations and pathological change's whole judgment to surpass.
1991年龙夫威(右)等中美学者寻访平遥超山书院遗址。五台东冶镇永安村北的徐继畬之墓。
Chinese and American scholars view the site of the Chaoshan Academy at Pingyao in 1991 (Prof. Fred Drake on right). Xu Jiyu's tomb in Yong'an, Wutai.
1991年龙夫威(右)等中美学者寻访平遥超山书院遗址。五台东冶镇永安村北的徐继畬之墓。
Chinese and American scholars view the site of the Chaoshan Academy at Pingyao in 1991 (Prof. Fred Drake on right). Xu Jiyu's tomb in Yong'an, Wutai.
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