Purpose: We previously analyzed clinical examinations and first diagnosis (pre-treatment diagnosis) for new patients at the Clinic of Operative Dentistry and Endodontics in Kyushu Dental University Hospital. In this study, to clarify the current status of endodontics more accurately, we analyzed the relationship between symptoms and treatment contents from the perspective of definitive diagnosis for new patients at the department. Methods: Of 651 patients who first visited our clinic and

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... dental treatment during a 3-year period (2011 2013) , we extracted 382 patients(439 teeth)related to pulpitis(Pul)and apical periodontitis (Per) as the subjects of this study, and surveyed the contents of diagnosis, age, tooth kind, referral rate from general practitioners, and contents of treatment(endodontic treatment, re-treatment, or tooth extraction) . Results: Regarding the rate of Pul and Per, a significant difference was not found between the first and definitive diagnosis. By age, the largest group of patients with Pul and Per was patients in their twenties (26.6%)and sixties(21.3%) , respectively. By tooth kind, the largest group of Pul and Per was mandibular molars. The referral rate from other clinics for the purpose of treatment for Pul and Per was more than 50%. The re-treatment ratio of Per was higher than that of Pul. Conclusion: These results indicate that the university hospital plays an important role as a secondary/tertiary medical institution for endodontic treatment, which is one of the most common treatments in private dental clinics. Also, reduction of the re-treatment rate in endodontic therapy is an urgent issue to improve the level of dentistry in Japan.