The rehabilitation of the posterior maxilla often has to deal with the lack of bone due to the presence of the maxillary sinus. When it is possible short implants can be used, to avoid the need of bone grafting. When bone height is less than 5-6 mm a maxillary sinus lift is needed. One of the techniques requires an ostectomy to obtain a lateral antrostomy, the elevation of the Schneiderian membrane, the use of bone graft (many different types can be used) and – when a primary stability can be obtained – the immediate placement of the implant. This is a well studied procedure that allows a straight forward rehabilitation with low complications, high predictability and high satisfaction for the patient.