Objective: To evaluate the clinical and radiological behavior after immediate implant placements after sinus lift when using (platelet rich fibrin) PRF and bone grafting in atrophic maxilla.

Materials and methods: It was planned the implant-supported rehabilitation in three atrophic maxillas, where radiographically evidence of pneumatization of the maxillary sinuses range from 5 to 8 mm. It was placed 9 dental implants and 4 sinus lift in three patients. We use simultaneous sinus lift technique through side window, bone graft combined (alloplastic and xenograft) with PRF, and the immediate implants placement.

Results: Implants stability, was clinically and radiographically evaluated one and six months post surgical procedure demonstrating a proper soft tissue healing and bone regeneration.

Conclusions: The placement of osseointegrated implants and sinus lift in the same surgical procedure is a predictable treatment option that have been supported in the literature. The use of PRF is useful because it promotes wound healing, growth and bone maturation, stabilization of the graft, the wound closure and hemostasis.

Conflict of interest : None declared.