The amorphous nature and composition of the surface apatite layers observed on glass polyalkenoate cements based on zinc silicate glasses (Zn-GPCs) after immersion in simulated body fluid (SBF) have been analyzed by the transmission electron microscopy (TEM). TEM was conducted using a JEOL JEM-2011 electron microscope operated at an accelerating voltage of 200 kV. The composition elements of the surface layer indicated the presence of calcium, phosphorous, zinc, and strontium within the amorphous structure. This composition, in particular the inclusion of Zn in the structure, indicates the lack of crystallinity associated with the formation of the apatite layers observed on Zn-GPCs after immersion in SBF. Zinc based GPCs release clinically beneficial amounts of Zn2+ from the mantle of set cements for prolonged periods of time to inhibit bacterial colonization of the implant.
D. Boyd et al., "TEM Analysis of Apatite Surface Layers Observed on Zinc based Glass Polyalkenoate Cements," Journal of Materials Science, vol. 43, no. 3, pp. 1170 - 1173, Springer, Feb 2008.
The definitive version is available at https://doi.org/10.1007/s10853-007-2362-7
Chemical and Biochemical Engineering
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Article - Journal
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01 Feb 2008
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