Is Pulp Inflammation a Prerequisite for Pulp Healing and Regeneration?

Figure 4

Formation of a reparative dentinal bridge. Six-week-old rat’s first maxillary molar, followed by pulp capping with Dycal, 4 weeks after Ca(OH)₂ implantation within the pulp exposure (thick arrow). The dentinal reparative bridge (arrows) is still incomplete. Tunnels and other defects connect the oral cavity and the dental pulp. Along the walls of the pulp chamber, a dense and continuous layer of reactionary dentin (RD and white asterisks) is formed, reducing the pulp (P) volume. Hematoxylin-eosin staining. Bar = 100 μm.