Failures of fiber posts were mainly due to post loss of retention , while metal post failures were mostly related to root fracture , post fracture and crown and /or post loss of retention .
In conclusion , metal and fiber posts present similar clinical behavior at short to medium term follow-up .
Remaining dental structure and ferrule increase the survival of restored pulpless teeth .
The aim of this systematic review was to compare the clinical performance and failure modes of teeth restored with intra-radicular retainers .
An up to 3-Year Controlled Clinical Trial Comparing the Outcome of Glass Fiber Posts and Composite Cores with Gold Alloy-Based Posts and Cores for the Restoration of Endodontically Treated Teeth.
PURPOSE This controlled clinical trial aim ed to compare the 3-year outcomes of glass fiber posts and composite cores with gold alloy-based posts and cores for the restoration of endodontically treated teeth . MATERIAL S AND METHODS One hundred forty-four patients in need of 205 restorations on endodontically treated teeth were selected and followed for 7 to 37 months ( mean : 21 ± 9 months ) . The teeth were primarily stratified based on the remaining tissue available to restore the tooth core with or without a post . Then , r and omization allocated the teeth to either test group 1 ( prefabricated glass fiber posts ) , test group 2 ( custom-made glass fiber posts ) , or test group 3 ( composite cores without posts ) . The control group consisted of gold alloy-based posts and cores . All posts/cores were covered with all-ceramic single crowns .  Failures were either absolute , such as root fractures or irreparable fractures of the post/core , or relative , such as loss of post retention or reparable fractures of the core . Success and survival probability lifetime curves , corrected for clustering , were drawn for the entire data set . RESULTS The recall rate at 3 years was 97.1 % . Absolute failures consisted of two root fractures and one endodontic failure , while relative failures included three instances of retention loss of the post/core and one post fracture . Because of the low number of events , no statistical tests were performed . The success and survival probabilities over all groups together at 3 years amounted to 91.7 % and 97.2 % , respectively . CONCLUSIONS After being followed for up to 3 years , both cast gold and composite post and core systems performed well clinical ly . Longer follow-up times are needed to detect possible significant differences . Int J Prosthodont 2011;24:363 - 372
Failures of fiber posts were mainly due to post loss of retention , while metal post failures were mostly related to root fracture , post fracture and crown and /or post loss of retention .
In conclusion , metal and fiber posts present similar clinical behavior at short to medium term follow-up .
Remaining dental structure and ferrule increase the survival of restored pulpless teeth .
The aim of this systematic review was to compare the clinical performance and failure modes of teeth restored with intra-radicular retainers .