sinus lift (augmentation) is performed by an experienced periodontist like Dr. Richardson. To begin the process, the gum tissue where the teeth used to be is cut back and raised to expose the bone beneath it. Special tools are used to make a small window in the bone to gain access to the sinus membrane and gently push it upward. Bone-graft material is then carefully packed into the sinus area to add mass to the bone so that it can support dental implants.