Alveolar Ridge Preservation Using Clot and Dense Polytetrafluoroethylene Membrane (PTFE-d): A Novel Surgical Protocol and Clinical Case Report

This study presents a biologically driven, minimally invasive protocol for alveolar ridge preservation (ARP) using autologous blood clot and dense polytetrafluoroethylene (PTFE-d) membranes. After tooth extraction, alveolar bone undergoes significant resorption, particularly in the first three months. The ARP/PTFE-d technique aims to stabilize the blood clot three-dimensionally, protect the healing socket from soft tissue invasion, and promote targeted osteogenesis through a biologically active and vascularized environment. A classification system is proposed to guide the indication of this protocol in sockets with preserved bony walls, avoiding its use in cases with major defects (type Vb). The clinical technique is described step-by-step, from atraumatic extraction to membrane placement and removal at 21 days, followed by CBCT evaluation at 12 weeks. A clinical case illustrates the efficacy of this approach, with minimal vertical bone loss and preservation of soft tissue contours. Biological mechanisms, such as the M1–M2 macrophage activati, mesenchymal stem cell activity, and osteoblast-mediated signaling, are highlighted as key components of successful bone regeneration. The results suggest that the ARP/PTFE-d protocol is a cost-effective and clinically efficient alternative to bone grafting, supporting implant planning without delaying treatment. Further controlled studies are recommended to validate its long-term outcomes.