Background: Platelet-rich fibrin (PRF) has regenerative characteristics and is used as an autologous source of growth factors for tissue regeneration wound healing. Objective: Evaluating the efficacy C-PRF increasing gingival thickness (GT) keratinized width (KTW) in subjects with a thin phenotype comparison I-PRF injection. Methods: Ten healthy participants (GT ≤ 1.0 mm) were enrolled this stu...