Polymerization Kinetics, Shrinkage Stress, and Bond Strength to Dentin of Conventional and Self-adhesive Resin Cements

Gabriel Nima*, Patricia Makishi, Bruna Marin Fronza, Paulo Vitor Campos Ferreira, Roberto Ruggiero Braga, André Figueiredo Reis, Marcelo Giannini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Purpose: To evaluate the kinetics of polymerization and shrinkage stress of resin cements, as well as their bond strength to dentin after 24-h or one-year water storage. Materials and Methods: Three conventional resin cements were evaluated: RelyX Ultimate (RUL), Panavia V5 (PNV), and Multilink N (MLN); and three self-adhesive resin cements: RelyX Unicem 2 (RUN), Panavia SA Cement Plus (PSA), and G-CEM LinkAce (GCL). Degree of conversion (DC), maximum polymerization rate (RPmax) and gel time va ues were obtained using Fourier-transform infrared spectroscopy (FTIR/ATR). Shrinkage stress values were deter mined with a tensiometer, using a universal testing machine (n=5). Indirect resin composite restorations (Solidex) were fabricated and cemented to the dentin surface using self-adhesive resin cements, or conventional resin ce ments with self-etching adhesive (n=5). Bonding performance was evaluated with the microtensile bond strength (μTBS) test after 24 h or one year of water storage. Results: MLN exhibited a higher DC (76.7%), whereas the percentage of other materials differed slightly (ranging from 54% to 58.5%). The RPm and shrinkage stress values differed significantly between the cements. PSA showed the longest gel time. Significantly higher μTBS were observed for conventional resin cements after 24-h and one-year storage; a decrease in μTBS was observed for MLN only. Conclusion: Self-adhesive resin cements may not perform as well as conventional resin cements. Although both categories of cements presented similar polymerization kinetics and shrinkage values, the self-adhesive resin ce ments showed lower μTBS compared to those of conventional resin cements.

Original languageEnglish
Pages (from-to)355-366
Number of pages12
JournalJournal of Adhesive Dentistry
Volume24
Issue number1
DOIs
StatePublished - 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022, Journal of Adhesive Dentistry.All Rights Reserved.

Keywords

  • Degree of conversion
  • Gel time
  • Microtensile bond strength
  • Rate of polymerization
  • Resin cement
  • Shrinkage stress

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