根管充填时根充剂应距根尖A 0. 1 ~0. 2 mmB 0. 2 ~ 0. 3 mm C 0.

根管充填时根充剂应距根尖

A 0. 1 ~0. 2 mmB 0. 2 ~ 0. 3 mm C 0. 1 ~ 0. 4mm D 0. 5 ~2mm E 2. 5 ~3mm