Composites of unsintered calcium phosphates and synthetic biodegradable polymers useful as hard tissue prosthetics
First Claim
1. A composite material comprising from about 25 to about 75 percent by weight of an unsintered calcium phosphate biomaterial and about 75 to about 25 percent by weight of synthetic biodegradable polymer selected from the group consisting of a polyester of glycolic acid, a polyester of lactic acid, polyhydroxy-butyrate, an α
- -amino acid polymer and mixtures thereof, said composite material also containing from about 5 to about 30 percent by weight of a pore-forming agent (based on the total weight of the composite material plus the pore-forming agent).
1 Assignment
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Accused Products
Abstract
Composite materials useful as hard tissue prosthetics comprising synthetic biodegradable polymers and unsintered calcium phosphate biomaterials optionally porositized by pore-forming agents are described. The composite materials may be ground and blended with a compatible water soluble pore-forming agent and then molded to form dense, shaped objects which may be made porous by leaching out said water soluble pore-forming agent. The composites may be used as hard tissue prosthetics either alone or in conjunction with conventional prostheses.
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Citations
9 Claims
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1. A composite material comprising from about 25 to about 75 percent by weight of an unsintered calcium phosphate biomaterial and about 75 to about 25 percent by weight of synthetic biodegradable polymer selected from the group consisting of a polyester of glycolic acid, a polyester of lactic acid, polyhydroxy-butyrate, an α
- -amino acid polymer and mixtures thereof, said composite material also containing from about 5 to about 30 percent by weight of a pore-forming agent (based on the total weight of the composite material plus the pore-forming agent).
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification