In the upper jaw, above our back teeth, there are cavities called the maxillary sinuses. After the extraction of the upper back teeth, bone resorption occurs in that area.

For treatments involving implants, we need a minimum bone height of 8–10 mm. Due to bone resorption, the maxillary sinus descends, and there is not enough bone available to place the implant. In such cases, under local anesthesia, the sinus cavity is lifted upward, bone graft material is placed in the area, and the implant is inserted afterward.

If the existing bone height is around 5–6 mm, sinus lift and implant placement can be performed in the same session. If the bone height is below 4 mm, the sinus is first lifted and bone graft material is placed; after waiting for 6 months, the implant procedure is carried out in a second session.