Fig. 2

Representative cross-sections and three-dimensional reconstructions of filling material (blue) and voids (yellow) in groups A ∼ H. (a) Representative cross-sections of the coronal 1/3; (b) Representative cross-sections of the middle 1/3; (c) Representative cross-sections of the apical 1/3; (d) Representative three-dimensional reconstructions of the whole root; (e) Representative three-dimensional reconstructions of filling material; (f) Representative three-dimensional reconstructions of voids