A practice-based study on the survival of restored endodontically treated teeth

J Endod. 2013 Nov;39(11):1335-40. doi: 10.1016/j.joen.2013.06.028. Epub 2013 Sep 13.


Introduction: 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.

Keywords: Clinical trial; dental restoration; endodontic treatment; longevity; retrospective study; survival.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Community-Based Participatory Research
  • Crowns / statistics & numerical data
  • Dental Prosthesis Repair / statistics & numerical data
  • Dental Restoration Failure / statistics & numerical data
  • Dental Restoration, Permanent / statistics & numerical data*
  • Denture, Overlay / statistics & numerical data
  • Female
  • Follow-Up Studies
  • Humans
  • Inlays / statistics & numerical data
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Proportional Hazards Models
  • Retreatment
  • Retrospective Studies
  • Survival Rate
  • Tooth Extraction / statistics & numerical data
  • Tooth, Nonvital / therapy*
  • Treatment Outcome