Fig. 3

Histological sections stained with Massons’s trichrome stain for control (a, d), platelet-poor plasma (b, e), platelet-rich plasma (c, f) group near the implant surface. No difference was observed in the myelinated nerve density between the three groups (upper row). The nerve fiber diameter in the PRP group was greater than in the control and PPP group (see arrows, bottom row). All sections derive from 6 months healing time and taken with a light microscope at × 20 (upper row) or × 40 magnification (bottom row). I, implant; B, bone