Bone cement composition
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United States of America Patent
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Apr 30, 1996
Issued Date -
N/A
app pub date -
Jul 27, 1994
filing date -
Jul 28, 1992
priority date (Note) -
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Abstract
A bone cement composition has adjustable rheological properties, high strength, and produces a uniform radiological image. The cement is characterized by controlled retention and release of additives incorporated in beads included in the dry component of the cement. The cement comprises beads containing a polymerization initiator in controllable concentrations from 0% to 5% or more by weight. These same beads or others may also contain an opacifier. The polymerization initiator and the opacifier may be selectively distributed throughout the beads or at specific radial locations in the beads. They may also be selectively placed in beads of a particular advantageous size range. Furthermore, in other embodiments of the invention, other advantageous additives can be incorporated in the beads such as dyes, antibiotics, bone growth factors, and other pharmacological or therapeutic agents.
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