Dentin-like versus Rigid Endodontic Post: Eleven-year Randomized Controlled Pilot Trial on No-wall to Two-wall Defects

Research output: Contribution to journalArticlepeer-review


  • Michael Naumann
  • Guido Sterzenbach
  • Kerstin Bitter
  • Roland Frankenberger
  • Manja von Stein-Lausnitz

Colleges, School and Institutes

External organisations

  • Department of Operative and Preventive Dentistry, Charité–Universitätsmedizin Berlin
  • Department of Operative Dentistry and Endodontology, University of Marburg
  • Department of Prosthodontics, Berlin Institute of Health, Geriatric Dentistry and Craniomandibular Disorders


Introduction: This is the first long-term randomized controlled trial to evaluate dentin-like glass fiber posts (GFPs) compared with rather rigid titanium posts (TPs) for post-endodontic restoration of severely damaged endodontically treated teeth with 2 or fewer remaining cavity walls.
Methods: Ninety-one subjects in need of post-endodontic restorations were randomly assigned to receive either a tapered GFP (n = 45) or TP (n = 46). Posts were adhesively luted by using self-adhesive resin cement, followed by composite core build-up and preparation of 2-mm ferrule design. Primary end point was loss of restoration for any reason. Kaplan-Meier curves were constructed, and log-rank test was calculated (P < .05).
Results: After a follow-up of 132 months, 17 GFP and 20 TP restorations survived, and 19 failed (12 GFP, 7 TP). Failure modes for GFP were root fracture (n = 4), core fracture (n = 1), secondary caries (n = 1), endodontic failure (n = 2), extraction because of tooth mobility grade III associated with insufficient design of removable partial denture (n = 1), tooth fracture (n = 1), and changes in treatment plan (n = 2); failure modes for TP were endodontic failure (n = 5), root fracture (n = 1), and 1 extraction for other reasons. Cumulative survival probability was 58.7% for GFP and 74.2% for TP.
Conclusions: When using self-adhesively luted prefabricated posts, resin composite core build-up, and 2-mm ferrule to reconstruct severely damaged endodontically treated teeth, tooth survival is not influenced by post rigidity. Survival decreased rapidly after 8 years of observation in both groups.


Original languageEnglish
JournalJournal of Endodontics
Early online date23 Sep 2017
Publication statusE-pub ahead of print - 23 Sep 2017


  • endodontic post , glass fiber post , long-term clinical trial , post and core , randomized controlled trial , titanium post