Clinical Evaluation of Gingival Biotype Changes Using a Coronally Advanced Flap (CAF) in Combination with Leucocyte and Platelet- Rich Fibrin (L-PRF) Membranes of Different Thickness for the Treatment of RT1 Gingival Recession: a Randomized Controlled Clinical Trial.

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 L-PRF membrane 1 mm in thickness, will be positioned at the level of the de-epithelialised anatomical papillae.The flap will be repositioned coronally suturing the anatomical papillae on the surgical ones, using a Non-Resorbable 5.0 Polyamide Suture.

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 L-PRF membrane 2 mm in thickness, will be positioned at the level of the de-epithelialised anatomical papillae.The flap will be repositioned coronally suturing the anatomical papillae on the surgical ones, using a Non-Resorbable 5.0 Polyamide Suture.