Fig. 5

a, b Formation of a reparative dentinal bridge (rep) 4 weeks after pulp capping (Alizarin red and Masson’s trichrome). Tunnels crossing the reparative dentin formation prevent the total closure of the bridge. Reactionary dentin (rd) is separated from the dentin layer formed prior capping by calciotraumatic lines (ctl). The mesial and distal pulp horns remain non-mineralized (white asterisks). Bars: 100 μm