title: A practice-based study on the survival of restored endodontically treated teeth.
abstract: BACKGROUND
  This retrospective study evaluated the survival of endodontically treated teeth (ETTs) and investigated factors influencing restoration and tooth survival.
  
  
  METHODS
  Data from 795 ETTs were recorded, and success (restoration still intact) and survival (restoration intact or failed/repaired/replaced and tooth still in situ) were analyzed using Kaplan-Meier statistics. A multivariate Cox regression analysis was performed to assess the variables influencing success and survival.
  
  
  RESULTS
  At the end of the observation period (mean observation time = 4.48 years), 45 teeth had been extracted (annual failure rate for survival = 1.9% at 9.6 years) and 114 restorations had received a restorative follow-up treatment (annual failure rate for success = 4.9% at 9.6 years).
  
  
  CONCLUSIONS
  ETTs showed acceptable survival and success in the long-term. Variables showing significant influence on survival were the number of teeth in the dentition and the presence of decay at the moment the patient entered the practice.
authors.affiliation: Department of Preventive and Restorative Dentistry, College of Dental Science, Radboud University, Nijmegen Medical Centre, Nijmegen, The Netherlands; Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil. Electronic address: skupien.ja@gmail.com.
authors.forename: Jovito Adiel
authors.initials: JA
authors.lastname: Skupien
authors.forename: Niek
authors.initials: N
authors.lastname: Opdam
authors.forename: Rolf
authors.initials: R
authors.lastname: Winnen
authors.forename: Ewald
authors.initials: E
authors.lastname: Bronkhorst
authors.forename: Cees
authors.initials: C
authors.lastname: Kreulen
authors.forename: Tatiana
authors.initials: T
authors.lastname: Pereira-Cenci
authors.forename: Marie-Charlotte
authors.initials: MC
authors.lastname: Huysmans
mesh_terms: D000328:Adult; D055812:Community-Based Participatory Research; D003442:Crowns / Q000706:statistics & numerical data; D017269:Dental Prosthesis Repair / Q000706:statistics & numerical data; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003793:Dental Restoration, Permanent / Q000706:statistics & numerical data*; D003828:Denture, Overlay / Q000706:statistics & numerical data; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007284:Inlays / Q000706:statistics & numerical data; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D019233:Retreatment; D012189:Retrospective Studies; D015996:Survival Rate; D014081:Tooth Extraction / Q000706:statistics & numerical data; D019553:Tooth, Nonvital / Q000628:therapy*; D016896:Treatment Outcome
keywords: Clinical trial; dental restoration; endodontic treatment; longevity; retrospective study; survival