The primary objective of this study was to evaluate time effect on the clinical predictability of collagen matrix Xenograft (CMX) with melatonin gel versus connective tissue graft (CTG) and determine whether it is proposed to be an alternative in multiple adjacent gingival recession (MAGR) in recession type one (RT1)

this study was conducted to evaluate time effect on the clinical predictability of collagen matrix Xenograft (CMX) with melatonin gel versus connective tissue graft (CTG) and determine whether it is proposed to be an alternative in multiple adjacent gingival recession

Inclusion Criteria:

• Presence of RT1 GRs of the maxillary or mandibular arch in the esthetic zone with a GR depth ≥2 mm,
• patients >18 years old,
• Full mouth plaque index score <20%
• Systemically and periodontally healthy patients.

Exclusion Criteria:

• Smokers
• Patients with periodontitis stage III and IV were previous surgical treatment of GR,
• Pregnant or breastfeeding women; P
• Patients with para-functional habits or any source of occlusal trauma.