Bonding of contemporary glass ionomer cements to dentin

H. K. Yip, Franklin Chi Meng Tay, H. C. Ngo, R. J. Smales, David Henry Pashley

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

Objective: The objective of this study was to investigate the microtensile bond strength (μTBS) of contemporary glass ionomer cements (GIC) to sound coronal dentin. Methods: Three specimen teeth were prepared for each material tested: Fuji IX GP (GC), ChemFlex (Dentsply) and Ketac-Molar Aplicap (ESPE). GIC buildups were made according to the manufacturers' instructions. After being stored at 37°C, 100% humidity for 24 h, the teeth were vertically sectioned into 1 × 1 mm beams for μTBS evaluation. Representative fractured beams were prepared for scanning (SEM) and transmission electron microscopic (TEM) examination. Results: Results of the μTBS test were: Fuji IX GP (12.4 ± 8.6 MPa), ChemFlex (15.0 ± 9.3 MPa) and Ketac-Molar Aplicap (11.4 ± 7.7 MPa). One-way ANOVA and a multiple comparison test showed that ChemFlex had a statistically higher μTBS (p < 0.05). SEM fractographic analysis showed that the predominant failure modes were interfacial and mixed failures. The GIC side of the fractured beams revealed dehydration cracks, a high level of porosity, and voids with an eggshell-like crust. TEM analysis of the demineralized dentin sides of the fractured beams revealed the presence of an intermediate layer along the GIC-dentin interface. This zone was present on the fractured dentin surface in the case of interfacial failure, and beneath GIC remnants in specimens that exhibited a mixed failure mode. Significance: The findings suggest that the bonding of GIC to dentin is not weak and that the μTBS values probably represent the weak yield strengths of GICs under tension.

Original languageEnglish (US)
Pages (from-to)456-470
Number of pages15
JournalDental Materials
Volume17
Issue number5
DOIs
StatePublished - Sep 1 2001

Fingerprint

Glass Ionomer Cements
Ionomers
Dentin
Cements
Glass
Failure modes
Tooth
Electrons
Egg Shell
Scanning electron microscopy
Porosity
Bond strength (materials)
Analysis of variance (ANOVA)
Humidity
Dehydration
Yield stress
Atmospheric humidity
Analysis of Variance
Microscopic examination
Acoustic waves

Keywords

  • Glass ionomer cement
  • Microtensile bond strength
  • Surface interaction zone
  • Ultrastructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Bonding of contemporary glass ionomer cements to dentin. / Yip, H. K.; Tay, Franklin Chi Meng; Ngo, H. C.; Smales, R. J.; Pashley, David Henry.

In: Dental Materials, Vol. 17, No. 5, 01.09.2001, p. 456-470.

Research output: Contribution to journalArticle

Yip, HK, Tay, FCM, Ngo, HC, Smales, RJ & Pashley, DH 2001, 'Bonding of contemporary glass ionomer cements to dentin', Dental Materials, vol. 17, no. 5, pp. 456-470. https://doi.org/10.1016/S0109-5641(01)00007-0
Yip, H. K. ; Tay, Franklin Chi Meng ; Ngo, H. C. ; Smales, R. J. ; Pashley, David Henry. / Bonding of contemporary glass ionomer cements to dentin. In: Dental Materials. 2001 ; Vol. 17, No. 5. pp. 456-470.
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