Peri-implant bone loss at implants placed in preserved alveolar bone versus implants placed in native bone: A retrospective radiographic study

Objectives: The aim of our study was to compare peri-implant bone loss at implants placed in alveolar sockets filled with a particulate allogenous bone graft (DFDBA 300-500 µm) and platelet concentrates versus at implants placed in the native bone.