Surgical Protocol Bilateral sinus augmentation and simultaneous implant placement were performed in one appointment with same surgical protocol. All surgical procedures performed under local anesthesia (Ultracain D-S Forte; Sanofi-Aventis, Istanbul, Turkey). After elevation of mucoperiosteal flap a hinge door osteotomy was performed on the lateral wall of the maxillary sinus with a round diamond bur under saline solution irrigation. Schneiderian membrane was carefully detached from inferior and lateral walls of the sinus until creating enough space for placement of bone grafts. Implant osteotomies were performed and DBM putty bone graft (DynaGraft bone putty, Keystone Dental, Burlington, Mass) were placed medial, posterior and anterior side of implant sockets. Implants (Touareg S, Adin, Afula, Israel) were inserted into the osteotomy site after sufficient grafting. Access window filled with bone graft after implant placement. Membrane was not used over access window. 3/0 silk suture were used for closure of the flap. Antibiotic (amoxicillin thrice per day), analgesic (naproxen sodium, 2 twice per day) and mouthwash (isotonic saline twice per day) were prescribed for postoperative management. The patients were advised to have a soft diet and to avoid sneezing until two weeks. Sutures were removed one-week after surgery. No complications occurred during surgery. All surgical wounds healed uneventfully.