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Effect of Root Dentin Pretreatment With Different Concentrations of Chitosan on the Push-Out Bond Strength of Fiber Post Using a Self-Adhesive Resin Cement Publisher Pubmed



Ahmadi E1 ; Sheikhaleslamian SM2 ; Valizadeh S3 ; Kharazifard MJ4 ; Aghajani F5
Authors
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Authors Affiliations
  1. 1. Dental Research Center, Dentistry Research Institute, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, North Kargar, Tehran, 14174, Iran
  2. 2. Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, North Kargar, Tehran, 14174, Iran
  3. 3. Restorative Dentistry Specialist, Tehran, Iran
  4. 4. Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Operative Dentistry, School of Dentistry, Zanjan University of Medical Sciences, Zanjan, Iran

Source: BMC Oral Health Published:2025


Abstract

Background: This study aimed to investigate the effect of root dentin pretreatment with different concentrations of chitosan on the push-out bond strength (PBS) of fiber post using a self-adhesive resin cement. Methods: After post-space preparation in 56 maxillary central incisors that underwent endodontic treatment and were filled with gutta-percha (Spident, Korea) and AH Plus resin sealer (Dentsply, USA), the teeth were randomly divided into four groups (n = 14) for pretreatment with 2.5% chitosan, 1% chitosan, 17% ethylenediamine tetra-acetic acid (EDTA), and saline. Fiber posts were cemented into the root canals using Panavia SA resin cement. The teeth were then thermocycled (5°C-55°C, 5,000 cycles), and the roots were sectioned into coronal, middle, and apical thirds. The PBS was measured in a universal testing machine. The mode of failure was also determined under a stereomicroscope and a scanning electron microscope (SEM). The PBS data were analyzed using two-way ANOVA and Tukey’s post hoc test. Results: The mean PBS of 2.5% chitosan group was significantly higher than that of control group at the coronal, middle, and apical thirds of the root in the post-placement region. However, 2.5% chitosan group had a significant difference in PBS with the EDTA group only in the middle and coronal thirds (P < 0.05). Pretreatment with 1% chitosan and 17% EDTA did not significantly increase the PBS at any level from the root in the post-placement region. Cohesive failure was dominant in 2.5% chitosan group, while mixed failure had the highest frequency in other groups. Conclusion: Root dentin pretreatment with 2.5% chitosan improved the PBS of fiber post to root dentin by using a self-adhesive resin cement. © The Author(s) 2025.