Figure 2. Confocal laser scanning microscopy (CLSM) images following contamination with E. faecalis. A- Longitudinal view of the medial third of a root canal following group A contamination. Low level penetration of bacteria inside the tubules can be observed. Red color denotes dead bacteria; B- Longitudinal view of the cervical third of a root canal following group A contamination. Compared to Figure 2A, there are slightly more bacteria inside the tubules and some of them are green, denoting live bacteria; C- Longitudinal view of the cervical third of a root canal following group B contamination. A small amount of live bacteria can be observed; D- Longitudinal view of the medial third of the root canal following group B contamination. A small amount of live bacteria can be observed.
