Fig. 2
Micro-CT three-dimensional reconstructions of Ca(OH)2 placement in C-shaped or non-C-shaped PCF mandibular second molars. (A-B) I. Red parts in the models represent the initial post-preparation canal surface area in non-C-shaped PCF and C-shaped PCF, respectively. II-III. grey parts represent Ca(OH)2 that was placed into the canal using different delivery techniques. IV-V. green and red parts represent the surface area of the Ca(OH)2 that was and was not in contact with the initial canal surface, respectively. II, IV. Ca(OH)2 placed with syringes alone. III, V. Ca(OH)2 placed with syringes and lentulo spirals. (C-D) cross-sections views of the coronal, middle and apical thirds of roots