10 Years Results of Delayed and Immediately placed Maxillary Implants

Objectives: Retrospectively evaluate the clinical outcome of tapered, multi-threaded implants with a special emphasis on peri-implant crestal bone status around delayed and immediately placed in the Maxilla. Methods: Chart reviews were conducted of 46 patients who had been treated with173 implants for the treatment of one or more missing and/or unsalvageable teeth in the upper jaw. The implants were loaded either immediately or delayed. In all cases, marginal bone changes were calculated from the CEJ or implant neck to the crestal bone level utilizing standardized radiographics taken at implant placement (baseline) and during annual follow-up. Results: After a mean follow-up of 121 months (in immediate placed) and 119 months (in delayed placed), implant survival rate was 99% , and implant success rate was 97%. No discernable bone loss was evident in 85.5% of the surviving implants. Crestal bone loss was observed in 14.5% (25/173) of all surviving implants: 38.5% (25/65) of implants immediately loaded, and 29.9% (32/108) of implants with delayed loading. 21 implants exhibited 1 mm of bone loss, 3 implants lost 2 mm of bone and 1 implant lost 3 mm of bone. Low density maxillary jawbone and more extensive bone remodeling required around implants immediately placed into extraction sockets were the probable causes of observed bone loss in this study. Conclusions: Implants exhibited excellent long-term outcomes with little or no bone loss.