Effect of Dose-dependent Platelet Rich Fibrin(PRF)

In 2PRF+CAF group two layers of stacked PRF membranes were positioned over the recession area at the level of cemento-enamel junction(CEJ). In CAF+2PRF group,two layers of stacked PRF membranes were positioned over the recession area at the level of CEJ

Following this, in test groups, a horizontal sulcular incision was designed at the buccal side of recession area at the level of CEJ. The incision was extended in the interdental area to be connecting CEJ. A split thickness flap was raised without vertical incision.18 The papillae were disepithelialized. The root was planned and hard accumulations were removed but no chemical root treatment was performed. In test group-1, two layers of stacked PRF membranes were positioned over the recession area at the level of CEJ. In test group-2, four layers of stacked PRF membranes were positioned over the recession area at the level of CEJ (Figure 2). Membranes were sutured to the recipient bed by a resorbable suture (polyglycolic acid 6/0, Doğsan, Turkey) at the level of CEJ.

The connective tissue graft was sutured to the recipient bed by resorbable suture at the level of CEJ. Split thickness flap was coronally advanced and sutured by resorbable suture. Finally, periodontal dressing was fixed on the recipient surgical area.