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Figure 4: Group III. (a and b) Macroscopic and radiographic aspects, respectively, showing perforation in the pulp chamber floor. (c– f) Histological sections. (c and d) Presence of biofilm and infection on the external furca surface of the dentinal tubules (Brown and Brenn; ×66 and ×132 magnifications). (e and f) Bacteria within dentinal tubules and inflamed pulp tissue (HE, ×33 magnification). (g) Epithelial granuloma at the periapical region (HE, ×33)

Figure 4: Group III. (a and b) Macroscopic and radiographic aspects, respectively, showing perforation in the pulp chamber floor. (c– f) Histological sections. (c and d) Presence of biofilm and infection on the external furca surface of the dentinal tubules (Brown and Brenn; ×66 and ×132 magnifications). (e and f) Bacteria within dentinal tubules and inflamed pulp tissue (HE, ×33 magnification). (g) Epithelial granuloma at the periapical region (HE, ×33)