Volumetric Changes of Labial Soft Tissue Contour Following Different Approaches With Immediate Implant Placement

Statement of the problem: Tooth extraction is followed by ridge alteration and soft tissue contour collapse. Different strategies were proposed to limit this collapse however, the ability of these techniques to mimic the original soft tissue contour and to maintain long term stability is unclear. Purpose : The aim of this study is to evaluate the volumetric difference of buccal soft tissue contour as well as the radiographic changes, following tooth extraction and immediate implant placement with dual zone concept versus connective tissue graft. Materials and Methods: Thirty patients with single maxillary anterior or premolar tooth indicated for extraction will participate in this study, 15 patient in each group. Group 1 (test group) will be treated by immediate implant placement (IIP) with particulate bone grafts in the dual zone (the bone zone and the tissue zone) and customized healing abutment. Group 2 (control group) IIP with connective tissue graft (CTG) and customized healing abutment. Patient allocation is random for the 2 groups. Data will be collected pre-surgically and at follow up periods (3,6,9\&12 months and 6 months after delivery). Extra-oral scanning of the labial contour will be carried out to evaluate difference in contour gained and will be compared to the original contour and between treatment groups. Radiographic evaluation will be done using CBCT pre-operatively and at 12 months.