Lin G, et al. - The risk factors associated with early and late implant loss were assessed at the patient- and implant- based analysis in this retrospective study including 18,199 patients receiving 30,959 dental implants during the years 2011–2015. After 1–6 years observation time, the cumulative survival rates were 98.0% for patients and 98.7% for implants. Male sex, elderly patients, mandibular anterior location, bone augmentation and short implants were the general factors that were associated with implant loss.