Interaction of resin-modified glass-ionomer cements with moist dentine

C. K.Y. Yiu, Franklin Chi Meng Tay, N. M. King, David Henry Pashley, R. M. Carvalho, M. R.O. Carrilho

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Objectives. The objective of this study was to report on a novel phenomenon that occurs when resin-modified glass-ionomer cements (RMGICs) are bonded to moist human dentine. Methods. Dentine surfaces from extracted third molars were abraded with 180-grit SiC paper. Ten teeth were prepared for each of the two RMGICs tested (Fuji II LC, GC Corp. and Photac-Fil Quick, 3M ESPE). RMGIC buildups were made according to the manufacturers' instructions. After storage at 37°C, 100% humidity for 24 h, the bonded specimens were cut occlusogingivally into 0.9×0.9 mm beams. Dentine surfaces bonded with the two RMGICs were examined along the fractured RMGIC/dentine interfaces. Additional beams fractured within the RMGICS and at 3 mm away from the interfaces were used as controls. The fractured beams were examined using scanning electron microscopy (SEM), field emission-environmental SEM (FE-ESEM) and transmission electron microscopy (TEM). Results. SEM and FE-ESEM revealed numerous solid spherical bodies along the RMGIC/dentine interfaces. By contrast, no spherical bodies could be identified within the RMGIC fractured 3 mm distant from the bonded interface. TEM and energy dispersive X-ray analyses performed on carbon-coated ultrathin sections showed that these solid spherical bodies consisted of a thin aluminum and silicon-rich periphery and an amorphous hydrocarbon core within the air voids of the original resin matrix. Conclusion. The spherical bodies probably represent a continuation of GI reaction and poly(HEMA) hydrogel formation that results from water diffusion from the underlying moist dentine. Their existence provides evidence for the permeation of water through RMGIC/dentine interfaces.

Original languageEnglish (US)
Pages (from-to)521-530
Number of pages10
JournalJournal of Dentistry
Volume32
Issue number7
DOIs
StatePublished - Jan 1 2004

Fingerprint

Glass Ionomer Cements
Dentin
Electron Scanning Microscopy
Transmission Electron Microscopy
Third Molar
Water
Hydrogel
Silicon
Hydrocarbons
Humidity
Aluminum
Tooth
Carbon
Air
X-Rays

Keywords

  • Dentine
  • Interface
  • Permeability
  • Resin-modified glass-ionomer cement
  • Water movement

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Yiu, C. K. Y., Tay, F. C. M., King, N. M., Pashley, D. H., Carvalho, R. M., & Carrilho, M. R. O. (2004). Interaction of resin-modified glass-ionomer cements with moist dentine. Journal of Dentistry, 32(7), 521-530. https://doi.org/10.1016/j.jdent.2004.04.005

Interaction of resin-modified glass-ionomer cements with moist dentine. / Yiu, C. K.Y.; Tay, Franklin Chi Meng; King, N. M.; Pashley, David Henry; Carvalho, R. M.; Carrilho, M. R.O.

In: Journal of Dentistry, Vol. 32, No. 7, 01.01.2004, p. 521-530.

Research output: Contribution to journalArticle

Yiu, CKY, Tay, FCM, King, NM, Pashley, DH, Carvalho, RM & Carrilho, MRO 2004, 'Interaction of resin-modified glass-ionomer cements with moist dentine', Journal of Dentistry, vol. 32, no. 7, pp. 521-530. https://doi.org/10.1016/j.jdent.2004.04.005
Yiu, C. K.Y. ; Tay, Franklin Chi Meng ; King, N. M. ; Pashley, David Henry ; Carvalho, R. M. ; Carrilho, M. R.O. / Interaction of resin-modified glass-ionomer cements with moist dentine. In: Journal of Dentistry. 2004 ; Vol. 32, No. 7. pp. 521-530.
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