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Effect of Universal Adhesives on Resin Cement–Fiber Post–Core Materials
Journal article   Open access   Peer reviewed

Effect of Universal Adhesives on Resin Cement–Fiber Post–Core Materials

Masao Irie, Masahiro Okada, Yukinori Maruo, Kenraro Akiyama, Kumiko Yoshihara, Akimasa Tsujimoto and Takuya Matsumoto
Polymers, Vol.18(7), 810
03/26/2026
DOI: 10.3390/polym18070810
PMCID: PMC13074221
PMID: 41977557
url
https://doi.org/10.3390/polym18070810View
Published (Version of record) Open Access

Abstract

This study evaluated eleven resin cements used as core build-up materials by examining the following properties: (a) push-out force between root dentin and the fiber post; (b) pull-out force between the fiber post and the core build-up material; (c) shear bond strength of the resin cement to root dentin; (d) flexural strength of the resin cement; and (e) flexural modulus of elasticity of the resin cement. The purpose of this investigation was to clarify the relationships between recently available universal adhesives, core build-up materials, resin cements, and fiber posts. All experiments were performed at two evaluation periods: after 1 day of water storage (Base) and after 20,000 thermocycles (TC 20k). For the push-out test, simulated post spaces were prepared in single-rooted human premolars. The specimens were sectioned perpendicular to the long axis into 2 mm-thick slices and then subjected to push-out testing to assess the bond strength of the dentin–resin cement–fiber post complex. No significant differences in bonding performance were found between Base and TC 20k. These findings suggest that universal adhesives used for pretreatment of multiple substrates in fiber post cementation can provide not only strong but also durable adhesion over time.
 bonding performance universal adhesive fiber post luting materials root dentin

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