Fig. 1

Flowchart of the experimental procedures (CBCT, cone beam computed tomography; ELISA, enzyme-linked immunosorbent assay; HA, hyaluronic acid; i-PRF, injectable platelet rich fibrin, MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2Â H-tetrazolium bromide assay; P-ECM, pulp extracellular matrix; SEM, scanning electron microscopy)