Patient Morbidity After Palatal Free Gingival Grafts With or Without PRF Membranes Coverage

"Venous blood was collected with a butterfly needle in two 10 mL tubes without anticoagulants or other chemicals. The tubes were immediately centrifuged at 3000 rpm for 10 minutes.~At the end of centrifugation a fibrin clot (PRF) was obtained in the middle of the tube, just between the red corpuscles at the bottom and acellular plasma at the top. The PRF clot was taken from the tube and the red cells portion at the base of the clot was eliminated with sterile scissors Then the PRF was enveloped in sterile gauzes and positioned between two glass plates: the compression drove out the serum from the clot obtaining PRF membranes that were ready to be used in the surgical site."

In the Control Group hemostatic agents with oxidized and regenerated cellulosa were sutured to the palatal wound with mattress suture ( silk 5/0).