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Figure 1: The X-ray irradiation showed the differences of paste absorption and transmission of periapical tissue among the three groups in different experimental periods. Vitapex group: a (At week 0), b(At week 2), c(At week 4), d( At week 8); ZOE group: e (At week 0), f (At week 2), g (At week 4), h ( At week 8)

Figure 1: The X-ray irradiation showed the differences of paste absorption and transmission of periapical tissue among the three groups in different experimental periods. Vitapex group: a (At week 0), b(At week 2), c(At week 4), d( At week 8); ZOE group: e (At week 0), f (At week 2), g (At week 4), h ( At week 8)