Two-stage maxillary sinus reconstruction with endosseous implants: A prospective study

The aim of this prospective study was to evaluate the results of e-stage ma xillary sinus reconstruction using titanium implants placed into iliac cort icocancellous bone blocks previously grafted to the floor of sinuses. Fifty consecutive patients received 314 Branemark implants of varying lengths; 2 02 implants were placed in the grafted bone and 112 were placed in the adja cent anterior maxillary alveolar process, which had received buccal onlay b one grafts. Follow-up time was 9 to 48 months after implant placement, whic h was accomplished 5 months after bone grafting. Eighty-four percent of the implants were integrated into the grafted sinuses and 75% were integrated into the anterior graft. Six patients (12%) lost implants in strategic posi tions, leading to secondary implant placement prior to fabrication of fixed prostheses. Thirty-eight patients (70%) received fixed prostheses. Only 5 individuals (10%) attained permanent implant-anchored overdentures. One pat ient lost all implants. The total implant survival rate (80.9%) and the sur vival rate of the fixed prostheses (100%) compare favorably with other repo rts. (Int J Oral Maxillofac Implants 1998;13:758-766).