Inclusion Criteria:  more than 18 years old. systemically and periodontally healthy patients. need of single implant placement between two maxillary teeth. need of tissue augmentation due to concavity or soft tissue thickness less than 2 millimetres . more than 3 month after extraction. full mouth plaque index lesser than 20%. sufficient mesiodistal and buccolingual space. At least 10 millimetres mesiodistal dimension in tuberosity. sufficient implant primary stability. at least 6 mm crestal ridge width.  Exclusion Criteria:  History of periodontitis and radiotherapy. Need of horizontal ridge augmentation. Previous soft tissue augmentation. Heavy smoker( more than 10 cigarette per day) Local or systemic conditions that would interfere with routine periodontal therapy.