Absorbable implant materials having controlled porosity
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United States of America Patent
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Feb 9, 1999
Grant Date -
N/A
app pub date -
May 28, 1996
filing date -
May 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Absorbable implant materials having controlled porosity are formed by a method comprising the steps of: providing a dispersion of a bioabsorbable polymer, such as collagen, in a first solvent, such as water; adding particles of a second material, e.g. frozen water droplets or ice particles to the dispersion; followed by freezing the dispersion to form a frozen dispersion having the particles embedded therein, and removing both the first solvent and the second material from the frozen dispersion by freeze-drying or solvent extraction to leave the porous implant material. The invention also encompasses the use of such implant materials for wound healing applications.
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