LONG-TERM PROGNOSTIC FACTORS OF ROOT CANAL THERAPY IN PATIENTS WITH CHRONIC PULPITIS SECONDARY TO CRACKED TEETH

Tao Cao^{1, 2}, Conghui Jia^{1, 2}, Xin Wang^{1, 2, *}

¹Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, China - ²Department of Endodontics, School of Stomatology, Harbin Medical University, Harbin, China

Objective: To investigate long-term prognostic factors of root canal therapy in patients with chronic pulpitis secondary to cracked teeth, so as to provide more reference for the development of individualized intervention plans.

Methods: 134 teeth from 134 patients with chronic pulpitis secondary to cracked teeth admitted to our hospital from January 2015 to January 2017 were included retrospectively, all of whom received root canal therapy. After 5 years of follow-up, the retention rate of affected teeth was recorded, and the independent influence factors of the 5-year retention rate of affected teeth after root canal therapy were evaluated by means of univariate and multivariate analysis.

Results: After 5 years of follow-up, the final evaluation was completed, which indicated that the retention rate of 124 affected teeth from 124 patients was 91.13%. Univariate analysis showed that whether patients received crown restoration, crack distribution, crack depth and periodontal condition of affected teeth were all related to the 5-year retention rate of affected teeth after root canal therapy (P<0.05). Multivariate analysis of logistic regression model showed that crown restoration was an independent protective factor for 5-year retention rate of affected teeth after root canal therapy (P<0.05). Cracks reaching the floor of the pulp chamber and periodontal probing depth >5mm were independent risk factors for 5-year retention rate of affected teeth after root canal therapy (P<0.05).

Conclusion: The long-term prognosis of patients with chronic pulpitis secondary to cracked teeth is closely related to whether they receive crown restoration, crack depth and periodontal lesions of the affected teeth.