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(A) Representative 3D μCT images in the sagittal, frontal, and transversal sections of upper rat first molars. (B) Dentine length from the root tip to the crown, dentin thickness, and periapical lesion volume measured from mesial root canals of first rat molars. ∗Asterisk indicates significant differences between groups in each analysis (one-way ANOVA followed by Tukey's test; ∗∗p < 0.05, ∗∗∗p < 0.001, ∗∗∗∗p < 0.0001).
