Figure 3

Representative samples of reconstructed 3D micro-CT images from each group (a) R-PTN-CL Group (b) R-PTN- MNiTiH Group (c) O-PTN-CL Group (d) O-PTN- MNiTiH Group) showing the filling materials (pink) after obturation (I), the remaining filling materials (pink) after retreatment with different methods (II), and the canal surface without covering by RFMs (green) and covered by RFMs (red).