| http://www.w3.org/ns/prov#value | - As shown in FIG. 23, upon introduction of filler material 156, e.g., bone cement or polymethylmethacrylate (PMMA), into throughbore 154 by a tube or other suitable delivery device in the general direction of Arrow C, filler material 156 migrates into passages 153 and fills expandable structure 155.
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