Bone void filler and method of manufacture
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United States of America Patent
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Dec 28, 2010
Grant Date -
Feb 3, 2005
app pub date -
Apr 30, 2004
filing date -
Apr 30, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Bone void filler pieces that are conducive to packing or nesting when a plurality of pieces are located in a cavity in random orientation. The bone void filler of the present invention includes a higher bulk packing density and a porosity of less than 80% to provide a better match native bone ingrowth rate. Further, the bone void filler includes a bi-modal pore distribution with a high frequency of smaller pores to enhance the density characteristic of the bone void filler pieces. A method of manufacturing the bone void filler pieces includes a precursor powder composition suitable to form a ceramic matrix; the preform is converted by chemical reaction to a final composition. The preform further includes the use of a porogen that decomposes to gaseous decomposition products upon heating.
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