Clinical Evaluation of Laterally Closed Tunnel Technique Versus Coronally Advanced Flap Combined With Connective Tissue Graft for the Treatment of Isolated RT2 Gingival Recession

Inclusion Criteria: * Single RT2 buccal gingival recession ≥ 2 mm in the esthetic zone (Gingival recession associated with loss of inter-proximal attachment. The amount of interproximal attachment loss (measured from the interproximal CEJ to the depth of the interproximal pocket) was less than or equal to the buccal attachment loss (measured from the buccal CEJ to the depth of the buccal pocket) * Patients with good oral hygiene * Medically free patients * No signs of active periodontal disease (with no site showing probing depth \> 4 mm and full-mouth bleeding score (FMBS) 20% (measured at four sites per tooth). * Palate with sufficient thickness to accommodate soft tissue defect. Exclusion Criteria: * Smokers * Pregnancy * Severe gag reflex * Non-carious cervical lesion * History of mucogingival or periodontal surgery at the experimental site * History of medication that can affect periodontal healing