title: Treatment outcome in endodontics-The Toronto Study. Phases I and II: apical surgery.
abstract: This study prospectively assessed the 4 to 8 yr outcome of apical surgery performed by graduate students in phases I and II of the Toronto Study. The study cohort included 155 teeth in 138 patients. Outcome was assessed by a blinded and calibrated examiner. Clinical and radiographic measures were used for a dichotomous outcome: healed (no signs and symptoms, Periapical Index score </= 2 or scar), or diseased (presence of signs and symptoms, or Periapical Index score >/= 3). The recall rate was 85% and the overall healed rate 74%. Healed rate was significantly higher for teeth with small (</= 5 mm) than larger preoperative lesions (chi, p = 0.02). Logistic Regression revealed an increased odds of disease persistence for teeth with larger preoperative lesions (OR = 3.81, CI = 1.2-12.1), and preoperative root-filling of adequate length (OR = 3.7, CI = 1.1-11.1). Preoperative lesion size and root-filling length were significant predictors of outcome of apical surgery.
authors.affiliation: Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Ontario, Canada.
authors.forename: Nancy
authors.initials: N
authors.lastname: Wang
authors.forename: Keith
authors.initials: K
authors.lastname: Knight
authors.forename: Thuan
authors.initials: T
authors.lastname: Dao
authors.forename: Shimon
authors.initials: S
authors.lastname: Friedman
mesh_terms: D001047:Apicoectomy / Q000706:statistics & numerical data*; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009864:Ontario / Q000453:epidemiology; D017063:Outcome Assessment, Health Care; D010485:Periapical Periodontitis / Q000453:epidemiology; D011446:Prospective Studies; D012086:Reoperation; D012184:Retrograde Obturation / Q000706:statistics & numerical data*