الفهرس 
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Abstract
”To assess the influence of timing of soft tissue augmentation using free gingival graft (FGG) to increase width of keratinized mucosa labial to dental implant, Twenty patients with missing teeth and deficient width of the keratinized mucosa (KM) were selected and divided into 2 groups. 1st group (G1) received the FGG two months prior to implant placement, 2nd group (G2) received the FGG at time of second stage surgery. The increase in keratinized tissue width (KTW), soft tissue thickness (STT), bone level and soft tissue health around the implants were evaluated and compared at different time intervals (one, three, six and nine months) after soft tissue augmentation. The shrinkage percentage was also calculated for both groups. Both groups have shown significant increase in the width and thickness of KM with no significant difference in mean soft tissue gain, shrinkage, soft tissue health, mesial and distal bone loss between them. G1: was more easy technique, facilitate subsequent steps of implant, yet it was time consuming as it requires another surgery, more visits and patient dissatisfaction. FGG in G2: was time saving as it requires fewer surgeries, causes less stress, and provides greater patient satisfaction, yet, it was more sensitive technique and it may cause patient discomfort due to long time surgery.