Author(s): Marquis VL, Dao T, Farzaneh M, Abitbol S, Friedman S
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Abstract The 4- to 6-year outcome of initial endodontic treatment was assessed for phase III (1998-1999) of the Toronto Study. Of the 532 teeth treated, 248 were from discontinuers (excluded), 142 from dropouts, 10 extracted, and 132 (50\% recall) examined for outcome: healed (no apical periodontitis [AP], signs, symptoms) or diseased. Phase III was analyzed alone and combined with phases I, II (n = 373 teeth). Logistic regression performed on the combined phases I-III sample identified significant (p < or = 0.05) outcome predictors: preoperative AP (OR = 3.5; CI 1.7-7.2; healed: absent, 93\%; present, 80\%), number of roots (OR = 2.2; CI 1.0-4.7; healed: 1 - 92\%; > or =2 - 83\%), and intraoperative complications (OR = 2.2; CI 1.1-4.5; healed: absent, 88\%; present, 76\%). Treatment technique (OR = 2.8; CI 1.3-6.1; healed: Schilder, 89\%; alternative, 73\%) was suggested as an outcome predictor in teeth with AP, requiring confirmation from randomized controlled trials.
This article was published in J Endod
and referenced in Dentistry