A retrospective study of the 5-year survival and success of teeth with primary endodontic treatment performed by specialty students

Objective: The aim of this study was to retrospectively analyze the 5-year survival of teeth with primary root canal treatment performed by endodontic students. The aim of the study was to reveal the effect of the factors affecting survival and success and indirectly to increase the success of primary endodontic treatment. Methods: In this study, patients whose root canal treatment was completed by the specialty students of Süleyman Demirel University Faculty of Dentistry, Department of Endodontics between July 2018 and July 2019 were included. Within the scope of the study, periapical and panoramic radiographs of the patients in the database and the survival success of the endodontically treated teeth were evaluated. Results: The survival rate was 69.9% for the teeth present in the mouth. Age, number of filling faces, number of proximal contacts, restoration compatibility, homogeneity and initial PAI value were found to be associated with the long-term retention of the tooth after endodontic treatment. According to the results of our study, the overall success rate was 66.1% and the success rate of the existing teeth in the mouth was 94.6%. In terms of age, individuals over 65 years of age had a significantly lower survival rate compared to the 18-39 age group (p<0.05).The likelihood of retention of teeth with inadequate restoration fit was statistically significantly lower than that of teeth with adequate restoration fit (p<0.05).Initial PAI score affected survival. Survival was statistically significantly lower at baseline PAI 2 (p<0.05). Conclusion: Factors associated with survival and success of primary endodontically treated teeth were determined within the limits of this study. Gender, tooth type, restoration type, presence of post, working length, homogeneity, taper, filling face and number of proximal contacts had no effect on survival (p>0.05).There was no statistically significant relationship between success and all monitored variables (p>0.05). In order to evaluate the survival and success of primary root canal treated teeth, further studies are needed in which the variables are handled more carefully, the sample size is larger and standardized. Keywords: Primary Root Canal Treatment, Survival, Success