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[Analysis on results of endodontic treatment and influencing factors]
1Department of Cariology and Endodontology, School of Stomatology, Wuhan University, Wuhan 430079, China.
Objective:
To assess the clinical outcome of root canal therapy (RCT) and the various factors that may influence the outcome of RCT.
Methods:
A total of 695 teeth from 357 patients were retrospectively studied three years after endodontic treatment. Pre- and intra-operative information was collected from the original patient records. The post-operative sign or symptom, periapical status and coronal restoration integrity were examined 3 years after obturation. Data were subjected to bivariate and multivariate analysis.
Results:
The cure rate for 695 teeth was 75.1%, 96.0% of which was considered to be functional. The tooth group, pre-operative pulp and periapical status, quality of root filling and integrity of coronal restoration were revealed by means of bivariate analysis to exert a significant influence on treatment outcome. The logistic analysis indicated that the odds for cure in the teeth with pre-operative periapical radiolucency, underfilling and "open" coronal restoration were significantly lower by 2 folds, 3 folds and 1.6 folds than their counterparts, respectively.
Conclusions:
The pre-operative periapical status, quality of root filling and the integrity of coronal restoration are main predictors of outcome in RCT.