The International Journal of Prosthodontics 14 CLINICAL RESEARCH Correspondence to: Dr Daniel Cerny DCM klinika, Topolova 340 Hradec Kralove, 50003 Email: dr.cerny@gmail.com Submitted April 22, 2018; accepted July 6, 2018. ©2019 by Quintessence Publishing Co Inc. Retrospective 9-Year Clinical Outcome Report on Adhesive Post-endodontic Treatment of Anterior Teeth Using Prefabricated Fiber Posts Daniel Cerny, MUDr Department of Conservative Dentistry, Clinic of Dental Medicine, Palacky University, Olomouc, Czech Republic. Steven Eckert, DDS, MS Mayo Clinic, College of Medicine, Rochester, Minnesota, USA. Radek Mounajjed, DDS, PhD Department of Prosthodontics, Clinic of Dental Medicine, Palacky University, Olomouc, Czech Republic. Purpose: To evaluate survival rates of adhesive post-endodontic buildups made using composite resin and prefabricated quartz fber posts. Materials and Methods: This retrospective study included all buildups placed between January 1, 2008, and December 31, 2012, by a single skilled operator using a single-adhesive system and dual-curing cement. Final restorations included direct composites, various types of crowns, and fxed partial dentures. During recall, teeth were inspected by four different dentists, and survival analysis was performed using Kaplan-Meier test. Results: A total of 301 root canal–treated incisors and canines were restored. At repeat follow-up appointments, 291 restorations were still in function after a mean time of service of 7.13 ± 2.11 years. Cumulative survival probability at 9 years was 96.0%. No parameter observed was found by log-rank test to have a statistically signifcant effect on survival rate. Conclusion: Adhesive buildup with prefabricated fber posts in anterior teeth is a reliable method of post-endodontic treatment in this given clinical protocol. Int J Prosthodont 2019;32:14–16. doi: 10.11607/ijp.5913 T here are three factors that underscore protocols for restoring endodontically treated teeth: (1) Preserving all available dentin tissue is benefcial for restoration strength and longevity 1 ; (2) Post and core materials should have physical proper- ties similar to those of natural dentin 2 ; and (3) An increase in the number of residual dentinal walls used and/or 2 mm of ferrule lowers the risk of restoration failure. 3 Fiber-reinforced composite (FRC) posts as an alternative to traditional metal cores became the new paradigm when introduced in the 1990s. 4 The metal cores formerly used provided exclusive retention qualities but introduced higher costs and risks of procedural errors, while fber posts placed without further dentin reduction increased overall strength in incisors and premolars in single treatment sessions. 5 The objective of this report was to describe the time-dependent outcomes of a particular clinical technique. Within a group of patients who had buildups placed, the following parameters were recorded and compared: type of post, presence of air bubbles, number of treatment phases, and type of fnal restoration. MATERIALS AND METHODS Sample A total of 316 anterior teeth in 140 patients had fber post–supported buildup cores placed between January 1, 2008, and December 31, 2012. Placement was carried out by one skilled operator in a private dental offce. A total of 301 teeth (133 pa- tients) were included in the study due to loss of 15 patients at the baseline follow- up (when the fnal restoration was made, usually 2–4 weeks after the build-up was made). The fnal restorations for these teeth were completed by in-house operators © 2019 BY QUINTESSENCE PUBLISHING CO, INC. PRINTING OF THIS DOCUMENT IS RESTRICTED TO PERSONAL USE ONLY. NO PART M AY BE REPRODUCED OR TRANSM ITTED IN ANY FORM WITHOUT WRITTEN PERM ISSION FROM THE PUBLISHER.