Success and survival of post-restorations: six-year results of a prospective observational practice-based clinical study

Int Endod J. 2019 May;52(5):569-578. doi: 10.1111/iej.13040. Epub 2018 Nov 28.


Aim: This prospective, noninterventional, multi-centre, practice-based study aimed to evaluate the longevity of endodontically treated teeth (ETT) restored with posts and to analyse factors influencing the success and survival of endodontic posts.

Methodology: Eight general dental practitioners each placed up to 27 endodontic posts without any restriction to size and material. Teeth were restricted to incisors, canines and premolars. Multi-level Cox proportional hazards models were used to evaluate the association between clinical factors and time until failure.

Results: A total of 195 endodontic posts were followed-up for up to 6.5 years in 195 patients. Of these, 140 posts were judged as successful [mean success time: 59 (55-63) months]; the mean annual failure rate was 8.6%. This decreased to 4.4% when excluding recementations. 152 posts survived [mean survival time: 64 (60-67) months]. Recemented restorations had an eight times higher failure rate compared with new restorations. Furthermore, restorations with glass fibre post had a significantly lower success rate compared with titanium posts.

Conclusion: Relatively low success and survival rates occurred for restorations with posts after root canal treatment in a private practice setting after a follow-up of up to 6.5 years. Recemented crowns had a high risk of failure.

Keywords: endodontically treated teeth; post-endodontic; practice-based multivariate analysis; recementation; risk factor.

Publication types

  • Observational Study

MeSH terms

  • Composite Resins
  • Crowns
  • Dental Restoration Failure
  • Humans
  • Post and Core Technique*
  • Prospective Studies
  • Tooth, Nonvital*


  • Composite Resins