Interaction of glass-ionomer cements with moist dentin

C. K.Y. Yiu, F. R. Tay, N. M. King, D. H. Pashley, S. K. Sidhu, J. C.L. Neo, M. Toledano, S. L. Wong

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52 Scopus citations


Glass-ionomer cements (GICs) are regarded as aqueous gels made up of polyalkenoic acid salts containing ion-leachable glass fillers. The consequence of water permeation across the GIC-dentin interface is unknown. This study used SEM, field-emission/environmental SEM (FE-ESEM), and TEM to examine the ultrastructure of GIC-bonded moist dentin. Dentin surfaces bonded with 6 auto-cured GICs were examined along the fractured GIC-dentin interfaces. Additional specimens fractured 3 mm away from the interfaces were used as controls. SEM revealed spherical bodies along GIC-dentin interfaces that resembled hollow eggshells. FE-SEM depicted similar bodies with additional solid cores. Energy-dispersive x-ray analysis and TEM showed that the spherical bodies consisted of a silicon-rich GIC phase that was absent from the air-voids in the controls. The GIC inclusions near dentin surfaces result from a continuation of the GI reaction, within air-voids of the original polyalkenoate matrix, that occurred upon water diffusion from moist dentin.

Original languageEnglish (US)
Pages (from-to)283-289
Number of pages7
JournalJournal of Dental Research
Issue number4
StatePublished - Apr 2004


  • Diffusion
  • Glass ionomer
  • Spherical bodies
  • Water

ASJC Scopus subject areas

  • Dentistry(all)

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    Yiu, C. K. Y., Tay, F. R., King, N. M., Pashley, D. H., Sidhu, S. K., Neo, J. C. L., Toledano, M., & Wong, S. L. (2004). Interaction of glass-ionomer cements with moist dentin. Journal of Dental Research, 83(4), 283-289.