Aim: The aim of this study was to determine whether the combined connective tissue graft (CTG) with injectable platelet rich fibrin (i-prf) with coronally advanced flap (CAF) improved root coverage of deep Miller Class I or II gingival recessions compared to CTG alone with CAF.

Methods: Seventy-two patients with Miller class I and II gingival recessions were enrolled. Thirty-six patients were randomly assigned to the test group (CAF+CTG+i-prf) or control group (CAF+CTG). Clinical evaluations were made at 6 months

Inclusion Criteria:

• ≥19 years of age,
• Periodontally and systemically healthy,
• FMPS and FMBS <15%,
• Presence of deep Miller class I and II gingival recession defect (≥3 mm in depth) at the buccal aspect of incisors,

Exclusion Criteria:

Smoking,

• Contraindications for surgery,
• Presence of recession defects associated with caries, deep abrasion, restoration or pulpal pathology.