This report presents seven patients who were treated with combined alveolar split/sinus grafting technique and dental implants and followed for 1 to 3 years. The grafting material included bone morphogenetic protein-2 in an absorbable collagen sponge plus allograft. The procedure was successful in all patients, who received implants either simultaneously with grafting or 4 to 6 months after grafting. Schlagwörter: allografts, alveolar split osteotomy, bone morphogenetic protein, book flap, dental implants, i-flap, interpositional bone grafting, sinus elevation