**Abstract**

Alveolar bone resorption after tooth extraction can lead to considerable loss of bone volume, which can complicate dental implant planning. To limit this bone loss, immediate post-extraction bone grafting is recommended, while maxillary sinus grafting may be necessary in cases of insufficient sub-sinusal bone height. The use of a combination of particulate Demineralized Freeze-Dried Bone Allograft (DFDBA) and platelet concentrates, such as Platelet-Rich-Fibrin (PRF), has shown promising results in alveolar bone preservation after teeth extractions, as well as in sinus bone grafts (sinus lifts). We conducted several studies, both clinical and histomorphological, to find out if the use of this combination of biomaterials could lead to good bone quantity and quality, and be suitable for implants. Following the results of our studies, the use of particulate DFDBA combined with PRF, whether for alveolar bone preservation after dental extractions or sinus lifts, appears to be an effective technique to maintain or recreate bone volume for dental implant placement. Moreover, histomorphometric study shows a good quality and a good maturity of bone gained with this technique.

**Keywords:** bone graft, DFDBA, sinus lift, platelet concentrate, socket healing, post-extraction bone grafting
