Fig. (2) Formation of neodentin ten days after implantation of the A+4 peptide or 17IA4 dental pulp progenitor cells in the pulp.Control groups showed a limited formation of neodentin  around the beads (A) or occluding the pulp exposure ite (B). Implantation of A+4 charged beads induced the formation of neodentin in the pulp compartment (C). Implantations of the 17IA4 cells with (D) or without agarose beads (E) induced also the formation of osteodentin-like structures (F). Pulp (p), dentin (d), enamel (e), alveolar bone .Bar 200µm.