This prospective clinical study aims to evaluate and compare the effectiveness of coronally advanced flap (CAF) and tunnel techniques, both combined with platelet-rich fibrin (PRF), in the treatment of multiple Miller Class I-II gingival recessions. Eleven participants with bilateral defects will be treated using a split-mouth design. Periodontal parameters will be assessed at baseline, 3 months, and 6 months.

The objective of this prospective clinical trial is to compare two mucogingival surgical techniques-coronally advanced flap (CAF) and tunnel technique-used in combination with platelet-rich fibrin (PRF) for treating multiple Miller Class I-II gingival recessions. Eleven systemically healthy participants with bilateral gingival recessions will be enrolled. CAF+PRF will be applied on one side, and Tunnel+PRF on the contralateral side. Clinical parameters including plaque index, gingival index, bleeding on probing, probing depth, clinical attachment level, recession height and width, and keratinized tissue height will be recorded at baseline, 3 months, and 6 months. Root coverage outcomes and clinical attachment gain will be analyzed.

Inclusion Criteria:

• Age 18 years or older
• Systemically healthy individuals
• Presence of bilateral Miller Class I-II multiple gingival recessions
• Good oral hygiene and willingness to follow instructions
• Signed informed consent

Exclusion Criteria:

• Use of tobacco or smoking
• Pregnancy or lactation
• Presence of systemic diseases affecting periodontal health
• Use of medications that may affect healing (e.g., corticosteroids)
• Periodontal surgery in the same area within the last 6 months

This study does not plan to share individual participant data (IPD).

The clinical examiner who recorded the outcome measures was blinded to the type of surgical technique applied on each side.