To evaluate the outcomes of buccal gengival recession type 1 (RT1) treated with the tunnel technique in conjunction with a cross-linked hyaluronic acid and subepithelial palatal connective tissue grafts.

To evaluate the outcomes of buccal gengival recession type 1 (RT1) treated with the tunnel technique in conjunction with a cross-linked hyaluronic acid and subepithelial palatal connective tissue grafts.

To evaluate the esthetic outcome as perceived by periodontists, using the root coverage esthetic score (RES).

Test Group - Tunnel technique in conjunction with a cross-linked hyaluronic acid and subepithelial palatal connective tissue grafts.

Control Group - Tunnel technique and subepithelial palatal connective tissue grafts.

Inclusion Criteria:

• None of the patients were smokers and all were systemically healthy without any signs of periodontal disease.
• Each patient had to display at least one ginvigal recession (RT1) of a depth of ≥ 2 mm.
• Patients exhibited an adequate level of oral hygiene evidenced by a full- mouth plaque score (FMPS) < 25%39 and full-mouth bleeding score (FMBS) < 25%.

Exclusion Criteria:

• Smokers
• Gingival recesstion RT 2 or RT 3 (Cairo 2011).