Inclusion Criteria:  ≥18 years. Periodontally and systemically healthy. Presence of Miller class I and II GR defects or class III with no interproximal clinical attachment loss. Recession >2mm in depth at the buccal aspect. Full-mouth plaque and bleeding score ≤20%. No previous periodontal surgery. Presence of identifiable CEJ (a step ≤1mm at the CEJ and/or presence of root abrasion, but with identifiable CEJ, will be accepted).  Exclusion Criteria:  Tobacco smoking of ≥10 cigarettes a day. Contraindications for periodontal surgery. Medications known to affect the gingiva or interfere with wound healing. Pregnancy. Active orthodontic therapy. caries or restorations in the area to be treated.