Long term results with intraosseous implants: a questionnaire-based assessment

The results of an FDI questionnaire-based survey involving dentists from five countries reporting on 507 implants were compared with those of similar surveys on implantations conducted by the American Dental Association in 1977 and subsequent years. There were questions on retention time, materials used and types of implants; of the 1024 recorded implants, the loss rate was calculated at 16.5 per cent. This rate was compared with those found in objective follow-up investigations reported in the literature (total 695 implants) and a realistic loss rate of approximately 16 per cent, was confirmed.