A retrospective multicenter cohort study evaluated the long-term survival of 3,555 bone-level dental implants placed between 2012 and 2018 at two university dental hospitals. Researchers followed patients for up to five years to identify factors associated with implant success and failure. The study demonstrated excellent outcomes, with a 5-year cumulative survival rate of 98.8% at the implant level and 99.0% at the patient level. However, certain factors influenced implant longevity.
Patients who had lost teeth due to periodontitis were at a higher risk of implant failure compared with those whose tooth loss resulted from other causes. Implant survival was also affected by the need for guided bone regeneration during treatment. A key finding was the impact of supportive periodontal therapy (SPT). Among patients with periodontitis-related tooth loss, those who regularly attended…
