Alassadi M, et al. - Using Kaplan-Meier estimate, researchers determined survival rates of root resection procedure and reasons for failure in an academic setting. Through electronic and paper chart, patient-related demographic information, medical history information and relevant data pertaining to the root-resected teeth performed from January 1990 to September 2017 were reviewed. By Pearson's chi-squared and Kruskal-Wallis (KW), the link between the reasons for failure and independent variables was established. The study sample consisted of 85 patients with an average follow-up of 5.0 ± 4.3 years (range: 1–16.8 years). Data reported that the mean survival time with the Kaplan-Mayer analysis was 109.9 months (9.1 years). The most common causes of failure were fracture (39.5%), caries (26.3%) and periodontal disease (23.7%). Interestingly, in the first 4 years after therapy, most of the failures occurred. For molars with furcation defects, root resection therapy remains a treatment solution. Above 50% of teeth remained functional after 9 years of root resection therapy in an academic setting.