The bone-added osteotome sinus floor elevation technique: Multicenter retrospective report of consecutively treated patients

A retrospective clinical evaluation of patients consecutively treated from multiple centers was performed. The treatment of these patients utilized th e bone-added osteotome sinus floor elevation (BAOSFE) procedure with immedi ate implant fixation. The BAOSFE method employs a specific set of osteotome instruments to tent the sinus membrane with bone graft material placed thr ough the osteotomy site. A total of 174 implants was placed in 101 patients . Implants were of both screw and cylinder shapes with machined, titanium p lasma-sprayed, and hydroxyapatite surfaces from various manufacturers. The 9 participating clinicians used autografts, allografts, and xenografts alone or in various combinations, and the type of graft was selected by the individual clinicians. The choice of graft material did not appear to infl uence survival rates. Loading periods varied from 6 to 66 months. The survi val rate was 96% or higher when pretreatment bone height was 5 mm or more a nd dropped to 85.7% when pretreatment bone height was 4 mm or less. The mos t important factor influencing implant survival with the BAOSFE was the pre existing bone height between the sinus floor and crest. This short-term ret rospective investigation suggests that the BAOSFE can be a successful proce dure with a wide variety of implant types and grafting procedures.