When upper molars or wisdom teeth are removed, often the maxillary sinuses (located behind your cheeks, above the upper teeth) are left vulnerable with only a thin bone separating them from the mouth. This bone is too thin to place dental implants to preserve this bone, so often a sinus augmentation, or sinus lift, is necessary.
A sinus lift uses bone grafting to produce bone in the maxillary sinus floor to allow the density for dental implants to be placed. During the procedure, a small incision is made in the molar region to expose the jawbone, through which bone graft material is planted. Over several months, this material bonds with existing bone to grow additional density. This new bone growth gives you the opportunity to place dental implants that can preserve the health of the underlying jawbone.