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Interaction of glass-ionomer cements with moist dentin

Lookup NU author(s): Dr Sharanbir Sidhu

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Abstract

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.

Publication metadata

Author(s): Yiu CKY, Tay FR, King NM, Pashley DH, Sidhu SK, Neo JCL, Toledano M, Wong SL

Publication type: Article

Publication status: Published

Journal: Journal of Dental Research

Year: 2004

Volume: 83

Issue: 4

Pages: 283-289

Print publication date: 01/04/2004

ISSN (print): 0022-0345

ISSN (electronic): 1544-0591

Publisher: Sage Publications, Inc.

URL: http://dx.doi.org/10.1177/154405910408300403

DOI: 10.1177/154405910408300403

PubMed id: 15044500

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