Patient-, tooth-, and dentist-related factors influencing long-term tooth retention after resective therapy in an academic setting-a retrospective study

摘要

Objectives The aim of this study was to evaluate long-term (>= 5 years) tooth survival after resective therapy of multi-rooted, periodontally treated teeth and investigate the influence of patient-, tooth-, and dentist-related risk factors on tooth loss. Materials and methods A total of 128 patients with root-resected molars were reexamined. Patient-, tooth-, and dentist-related factors were assessed. Tooth survival times were estimated using the Kaplan-Meier method in addition to a Cox proportional hazard frailty model with survival as the dependent outcome to assess an association with predictor variables. Results Overall, 100 patients with 130 molars were included. The average postoperative reevaluation period was a 9.62 +/- 3.08 year showing an overall survival rate of 56.9% after resective therapy. A cumulative survival rate of 69% (95% CI (61%; 77%)) after 5 years decreasing to 48% (95% CI (35%; 61%)) after 15 years was detected. The median survival time of resected molars was 13.83 years (95% CI (8.75; infinity)). Adherence, smoking, and insurance status were detected to significantly influence the risk for loss of molars after resective therapy. Conclusions Resective periodontal procedures can still be considered an option to retain periodontally compromised molars. In contrast to dentist- and tooth-related factors, patient-related factors impacted significantly upon tooth survival.