We described in the present case a vertical lack of the bone from the alveolar ridge to the opposing teeth, the short distance from the reabsorbed ridge to the floor of the maxillary sinus, and the presence of septa and a thickened sinus membrane within the maxillary sinus. A sandwich bone graft was successfully applied and followed up in the long term. The resulting gains in ridge height and increased thickness of the alveolar ridge appear to have been sufficient for effective placement of the implants, given that these implants have been maintained for 9 years since surgery.