Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 21 0 2024 08 04 1 6 Zahra Bahrololoomi Department of Pedodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Alireza Danesh Kazemi Department of Restorative Dentistry, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Fatemeh Zarebidoki Department of Pedodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mahsa Mohammadi Private practice, Yazd, Iran 2020 09 11 2021 05 29 Objectives: The use of fiber posts in endodontically treated primary maxillary central incisors improves the retention of composite resin restorations. The purpose of this study was to evaluate the effect of 4 different luting cements on fracture resistance of primary maxillary central incisors with fiber posts. Materials and Methods: In this in vitro study, 40 primary maxillary central incisors were endodontically treated and obturated with Metapex. They were then randomly divided into four groups (n=10) for cementation of fiber posts with GC Fuji I glass ionomer luting cement, Panavia F2.0 dual-cure luting cement, Panavia SA Luting Plus cement (self-adhesive), and TotalCem self-adhesive cement. After 1000 thermal cycles, the fracture resistance was measured. Data were statistically analyzed using ANOVA (alpha=0.05). Results: The mean fracture resistance was 267.07±130.01N in TotalCem, 257.27±102.56N in Panavia F2.0 dual-cure cement, 227.82±110.40N in Panavia SA Luting Plus self-adhesive cement, and 220.89±59.96N in GC Fuji I glass ionomer group. There was no statistically significant difference in fracture resistance among the four groups (P=0.714).   Conclusion: Type of luting cement had no significant effect on fracture resistance of primary maxillary central incisors with fiber posts. Nonetheless, TotalCem yielded the highest fracture resistance. Considering its self-adhesive property and easy workability, it can be a good option for cementation of fiber posts in endodontically treated primary central incisors. https://fid.tums.ac.ir/index.php/fid/article/view/3768 https://fid.tums.ac.ir/index.php/fid/article/download/3768/2059