15 sites will be treated.The extent of the depth of the recession will be reported on the anatomical papillae and, after adding 1 mm, 2 horizontal incisions of approximately 3 mm will be made at the base of the surgical papillae laterally to the recession.Two divergent releasing incisions will be made extending approximately 2-3 mm into the alveolar mucosa.The surgical papillae will be detached in partial thickness. A full thickness dissection will be performed from the bottom of the recession to expose approximately 3mm of the crest bone.A partial thickness dissection will be performed in the most apical portion of the flap until complete passivation of the flap is obtained.The harvesting of the epithelial-connective graft will be performed at the level of the maxillary tuberosity. The de-epithelialised graft will be sutured at the level of the de-epithelialised anatomical papillae.The flap will be repositioned coronally suturing the anatomical papillae on the surgical ones.

15 sites will be treated.The extent of the depth of the recession will be reported on the anatomical papillae and, after adding 1 mm,2 horizontal incisions of approximately 3 mm will be made at the base of the surgical papillae laterally to the recession. Two divergent releasing incisions will be made extending approximately 2-3 mm into the alveolar mucosa. The surgical papillae will be detached in partial thickness. A full thickness dissection will be performed from the bottom of the recession to expose approximately 3mm of bone.A partial thickness dissection will be performed in the apical portion of the flap to obtain complete passivation.The L-PRF membranes will be realized centrifuged venous blood collected in two 10-ml sterile tubes at 3000 rpm for 10 minutes and squeezing the fibrin clot. L-PRF membranes will be superimposed to crete a double layer of about 2 mm thickness.The flap will be repositioned coronally suturing the anatomical papillae on the surgical ones.

Coronally advanced flap and subepithelial connective tissue graft harvested from the maxillary tuberosity area.

Gingival tissue thickness 2 mm apical to the recession

Distance between gingival margin and Mucogingival Junction

Distance from cementoenamel junction and gingival margin