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作者在狗身上的双尖牙作三种材料的根管倒充填术观察,这三种充填材料是:银汞合金,聚羧酸锌粘固粉和Cavit。将狗进行全麻,作成组织办,用701号裂钻在相当于根尖部的地方去除完整的皮质
The authors observed the bicuspid teeth in dogs as root canal retrograde filling of three materials: amalgam, zinc polycarboxylate cement and Cavit. The dogs were general anesthesia, made of tissue to do with the No. 701 split in the equivalent of the root tip of the split to remove the entire cortex