Figure 1B.

The reverse side of the membrane in which no platelets or cells are visible, but a coarse surface of fibrin strands and bundles is visible. (C) Representative picture of the platelet/cell-rich area. (D) The same field as in A at higher magnification shows platelets on the surface of the fibrin network. (E) A higher magnification of the same field as in B of the reverse side of the membrane in which no platelets or cells are visible, but a coarse surface of fibrin strands and bundles is visible. (F) A higher magnification of the same field as in C shows a thick layer of unactivated platelets in which a few nucleated cells are visible. PRFM, platelet-rich fibrin matrix.