Comparison of Using Collagen Membrane and A-PRF Using VISTA Technique in Gingival Recession Treatment

Inclusion Criteria: * (18-50) years old with at least 2 sites with gingival recession type (RT1) Cairo Classification (GR with no interdental attachment loss). The interdental CEJ is not detectable clinically on the labial surfaces of the teeth. * Recession in the maxillary anterior region ≥1 mm of attached gingiva, pocket depth (PD) of \<3 mm, recession depth (RD) ≥2 mm, and gingival index (GI) score ≤1. * Systemically healthy, willing individuals with good oral hygiene and without contraindications for surgical interventions Exclusion Criteria: * the presence of severe systematic diseases or immunodeficiency and contraindicated with surgical interventions. * Allergies to medicaments used in the treatment process. * Patients with removable or fixed dentures. * Patients with cervical abrasion, direct and indirect restorations involving the cervical areas of the maxillary anterior. * Participants with smoking, tobacco chewing, and alcohol consumption. * The presence of high frenal attachment and participants who had previously undergone any periodontal surgical procedure or regenerative therapy in the past 1 year at the same site of the planned treatment.