Implants after 10 years: about 95% survive, but survival is not success

Ask a patient how an implant is doing after ten years and the honest answer is often "it is still there". Retention is easy to count. Biological health is harder, and the literature has rarely looked at both beyond the decade mark.

This systematic review and meta-analysis set out to update failure and survival estimates for implants followed for at least ten years, and to see how the definition of success and the biological outcomes change the reading. It included randomized controlled trials, prospective cohorts and retrospective cohorts. Failure proportions were pooled by study design with random-effects models, corrected for clustering and reported with prediction intervals; sensitivity analyses tested influential studies, risk of bias, implant surface era and clustering assumptions. Success, probing depth (PD), marginal bone loss (MBL) and peri-implantitis were summarized descriptively.

Thirty-four studies were analyzed, with 7522 patients and 20,445 implants. Pooled failure was 5.1% in prospective studies, 4.9% in retrospective studies and 4.8% in randomized trials, which corresponds to survival of about 95% regardless of design. Success averaged 85.1% across 14 studies, but the definitions behind that figure varied substantially. Descriptive means were 2.99 mm for PD and 1.30 mm for MBL, and implant-level peri-implantitis averaged 10.8%, with a range from 3.0% to 39.9% across studies.

The authors conclude that implants are highly durable in terms of retention, with roughly 95% survival between 10 and 25 years. But survival does not establish long-term biological health or true treatment success: success rates were lower and definition-dependent, and peri-implant disease varied widely. Retention is a necessary but insufficient endpoint. Long-term assessment should combine biological, radiographic, technical, functional and patient-centered outcomes.