Multiple adjacent gingival recessions (MAGRs) are frequently seen in mandibular posterior teeth and present significant challenges for clinicians, especially in cases with interproximal clinical attachment loss (CAL). Existing literature offers limited data on treatment outcomes for such clinical issues. The present study aimed to evaluate the root coverage outcomes of MAGRs with interproximal CAL in mandibular posterior teeth treated with connective tissue graft (CTG) utilizing the partial-full-thickness (PFT) tunnel and supra-crestal sling (SCS) suture for CTG stabilization. The outcomes of interest included the mean root coverage (mRC), the frequency of complete root coverage (CRC), changes in keratinized tissue width, and patient-reported This peer-reviewed, accepted manuscript will undergo final editing and production prior to print publication. Any blinded information will be available then. outcome measures. Seven patients with 22 multiple adjacent recession type (RT) 2 and RT3 defects in mandibular posterior teeth were treated. All treated sites healed uneventfully with no complications. At 12 months, results showed a mean mRC of 94.32 ± 7.77% and CRC in 63.64% of cases. Esthetic outcomes and patient satisfaction after 12 months were high, with minimal scarring and significant improvement in clinical attachment level and keratinized tissue width. These findings support the application of the PFT tunnel and SCS suture technique for the treatment of MAGRs with interproximal CAL in the mandibular posterior teeth with CTG.