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Title: Interaction of glass-ionomer cements with moist dentin
Authors: 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.
Keywords: Diffusion
Glass ionomer
Spherical bodies
Issue Date: 2004
Citation: 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. ScholarBank@NUS Repository.
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.
Source Title: Journal of Dental Research
ISSN: 00220345
Appears in Collections:Staff Publications

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