Survival of molar teeth in need of complex endodontic treatment: Influence of the endodontic treatment and quality of the restoration

The objective of this retrospective practice-based study was to evaluate the survival molar teeth and endodontic success after complex treatment up 89 months. Endodontically (Endodontic Treatment Classification (ETC) scores II III) treated first second molars between January 2011-October 2017 within a referral setting were included. Open apices, combined surgical treatment, ETC score I, patients <18 years or with an ASA-score >2 excluded. Cumulative estimates Cox regression analysis performed for tooth healing according Glossary Endodontic Terms. Restoration quality assessed using FDI criteria. Alpha set at 0.05. 279 endodontically in 245 included 268 success. After months, cumulative 91.7 % [95 CI: 86.8 %–94.9 %]. Absence adjacent deviance root canal morphology significantly decreased probability survival. endododontic rates 48 months 82.2 %CI: 75.7 %–87.1 %] 51.1 20.2 %–75.5 respectively. Deviance inadequate coronal seal healing. Indirect restorations obtained higher esthetic biological scores, however no difference direct indirect found concerning functional score. need Within daily clinical practice, dilemma performing (re)treatment explore other options reintervention is still urgent. Tooth seems satisfactory