Is Pulp Inflammation a Prerequisite for Pulp Healing and Regeneration?

Figure 5

Reparative and reactionary dentin formation. After filling a cavity prepared in the mesial aspect of the rat’s first maxillary molar, with Biodentine, a Ca₂SiO₃-based restorative cement, an early inflammatory reaction was stimulated. Inflammatory reaction of pulp cells producing reactionary (reduction of pulp volume) and reparative (formed in the center of the pulp volume) dentins. Hematoxylin-eosin staining. 
Bar = 100 μm.