An In Vitro Evaluation Study of the Geometric Changes of Root Canal Preparation and the Quality of Endodontic Treatment

Figure 3

SEM of smear layer removal in (a) coronal, (b) middle, and (c) apical thirds of the root canal. ((A) SEM (×10,000), (B) SEM (×25,000), and (C) SEM (×100,000)).

(a)

(b)

(c)