The purpose of this investigation was to clinically evaluate the modified method for surgical rehabilitation of severely atrophied maxillae with titanium implants. In 35 patients, sinus lift, Le Fort I osteotomy, and a down-tilting of the maxilla were performed. Bone grafts from the iliac crest, placed between the sinus mucosa and the sinus floor, were secured with three to four Bränemark titanium implants 10 to 20 mm in length on each side. The osteotomized maxilla was stabilized with miniplates. The observation period was between 1 and 4 years after abutment connection. The rate of successful osseointegration was 86.6%. Schlagwörter: atrophic maxilla, bone graft, Le Fort I osteotomy, osseointegrated implant, sinus mucosa