<qa>  How many individuals were enrolled in the study?Forty individuals 19 males and 21 females; age range: 18-35 years were enrolled in the study. Based on the remaining tissue at donor site after free gingival graft harvesting, individuals were divided into two groups: 1.0-1.9 millimeter mm remaining tissue at donor site after harvesting n 20, 2-2.9 mm remaining tissue at donor site after harvesting. Tissue filling in defect area from three points mesial, central and distal was measured at various time-points baseline, post-operative 1, 3, 6 months. 