Effect of curing mode on polymerization kinetics, mechanical properties, and dentin adhesion of self-adhesive and conventional resin cements

Bruna Marin Fronza, Amanda de Mello Fabião, Frederick Allen Rueggeberg, Marcelo Giannini

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: The objective was to evaluate the effect of curing mode on polymerization kinetics, biaxial flexural strength (FS) and modulus (MO), and dentin bond strength (BS) of self-adhesive and conventional resin-based cements. Materials and methods: Two materials were evaluated: one self-adhesive G-Cem LinkAce (GC) and one conventional resin cement RelyX Ultimate (RU). Polymerization kinetics was followed by infrared spectroscopy (n = 5). Disc specimens of light-activated or self-cured materials were tested for FS and MO (n = 10). Extracted human molars were divided into 4 groups (n = 10) according to resin cement, curing mode, and evaluation time (24 hs and 1 year). Composite discs were used to simulate indirect restoration which bonded to occlusal dentin with the resin cements, and light-activated or allowed to self-cure, and restored teeth were tested for microtensile BS. Data were submitted to statistical analysis at 5% significance level. Results: A rapid rise in conversion was observed when materials were light-activated. When self-cured, RU demonstrated a slower polymerization rate and lower conversion than GC. Dual curing yielded higher FS, MO, and BS than self-curing mode to RU cement, while no significant differences were observed for GC. Conclusions: Light-activation influences polymerization kinetics of resin-based cement, but it did not influence the mechanical properties and adhesion of the self-adhesive cement tested (GC).

Original languageEnglish (US)
Pages (from-to)2683-2695
Number of pages13
JournalJournal of Adhesion Science and Technology
Volume37
Issue number19
DOIs
StatePublished - 2023

Keywords

  • Luting materials
  • dentin bonding
  • flexural strength
  • light curing
  • modulus

ASJC Scopus subject areas

  • General Chemistry
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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