Immediately loaded implant-supported full-arches: Peri-implant status after 1-9 years in a private practice

Objective: Evaluate the peri-implant status on the long-term (1-9 years) of patients treated with immediatelyloaded full-arch prostheses in a private practice. Methods: A retrospective cohort study was carried out in patients consecutively treated with immediately loaded full-arch restorations supported with a minimum of 4 implants (Replace (R) Tapered, Nobel Biocare AB) and Multi-Unit conical abutments (MUA (R), Nobel Biocare AB) with a follow-up of over 12 months after placement of the final prosthesis. Results: A total of 378 implants were placed in 56 patients. Forty upper and 32 lower arches were restored, and 16 patients received bimaxillary rehabilitation. The mean duration of follow-up was 50 months, and the implant and patient peri-implantitis prevalences were 14.3% and 50%, respectively. Mucositis affected 56.9% of the implants and 50% of the patients. The survival rate was 96.4% by patient, but reached 99.5% in the implantbased analysis, and the success rate was 95.5% for implants and 80.4% for patients. Conclusions: Immediately-loaded full-arch restorations have an acceptable outcome after 1-9 years of follow-up. However, the incidence of peri-implant diseases is high, and further research is needed to confirm whether these may compromise the predictability of the prostheses over the long-term. Clinical significance: After a mean follow-up of 50 months, the incidence of mucositis and peri-implantitis affected the 96.4% and 50% of patients, respectively. However, these results were reduced almost by half when the threshold of bleeding on probing and peri-implant bone loss applied was less strict.