A closed sinus lift is a minimally invasive surgical procedure performed to increase bone volume in the posterior upper jaw when there is insufficient bone height for dental implant placement. The procedure is carried out through the implant site without opening a separate surgical window.

During the intervention, the sinus membrane is gently elevated, and bone graft material is placed to support new bone formation. This technique is typically used when only a small amount of bone augmentation is required. Closed sinus lift offers reduced surgical trauma, faster healing, and predictable outcomes, allowing safe implant placement with improved long-term stability and patient comfort.