Clinical Research 1 he Outcome of Endodontic Treatment : A Retrospective tudy of 2000 Cases Performed by a Specialist

i o f t t s c l p f f f bstract he purpose of this study was to evaluate the treatment utcome of initial endodontic treatment and nonsurgical etreatment performed by an endodontic specialist in his rivate office. A total of 2,000 teeth were examined linically and radiographically and the results were anayzed statistically by Pearson or Fisher’s Exact test and ultivariate logistic regression. The multivariate analysis valuated joint associations among various factors, using ogistic regression models. The dependent variable for this nalysis was the dichotomous outcome: healed versus isease. The overall endodontic success rate was 91.45%, nd the healed rate was significantly higher for initial ndodontic treatments than for nonsurgical retreatments; eeth without lesion than for those with lesions; teeth reated without complications than for those with comlications; recall period of 18-24 months than for other eriods, and teeth with final coronal restoration than for hose without. Of the 1376 teeth treated in the initial ndodontic treatment sample, the success rate was 4.0%. Multivariate analysis identified the presence of rocedural complications (file breakage, perforation and lare-up), as well as the absence of the restorations at ollow-ups as the significant predictors of outcome, showng lower rates of success. Of the 624 teeth in the nonurgical retreatment sample, 85.9% were successful. Stepise logistic regression analysis revealed that preoperative adiolucency was a strong statistically significant factor to etermine lower rates of success than in its absence. Two dditional variables (age and tooth type) were found to ave a significant influence on the outcome of the retreatent sample. A higher healed rate was observed for the 0-59 years age groups than others, while multirooted molars) teeth revealed a significantly lower percentage of uccess than pre-molars and anterior teeth. (J Endod 2007; 3:1278–1282)