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AssigneeUnion Carbide Corporation
InventorsMyron Spector, George T. Kwiatkowski, Walter H. Smarook, Michael J. Michno, Jr.
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Prosthetic devices, such as orthopedic, dental and maxillofacial prostheses, are provided which are composed of an inner load bearing, functional component and an outer foamed or sintered porous coating of selected bioengineering thermoplastics. The bioengineering thermoplastic coating is provided in regions where long-term bone fixation is desired by tissue ingrowth. The coatings offer substantial biomechanical advantages over any material system previously reported. Also provided, are anatomically shaped devices comprised totally of bioengineering thermoplastics with select porous areas; these devices include bone gap bridges, bone caps, and alveolar ridge augmentation implants.
A process for the preparation of a prosthetic device comprised of a load-bearing functional component and over at least a portion thereof, a porous coating of an engineering thermoplastic material which is biocompatible with, and conducive for, the ingrowth of bone spicules, said process comprising contacting at least a portion of the surface of said load-bearing functional component with a particulate bioengineering thermoplastic material selected from the group consisting of polysulfones, polyphenylenesulfides, polyacetals, thermoplastic polyesters, polycarbonates, aromatic polyamides, aromatic polyamideimides, thermoplastic polyimides, polyaryletherketones, polyarylethernitriles and aromatic polyhydroxyethers, said thermoplastic material having at least one fraction of a biomodal distribution of average particle diameters within the range from about 7:1 to about 5:1, by heating said particulate thermoplastic material at a temperature and time sufficient to sinter said material to provide a porous coating having a porosity, pore diameter and pore interconnections which enables such device to become firmly and permanently anchored into a musculosketal system in which it is employed by tissue ingrowth into the coating.
A process for the preparation of a prosthetic device comprised of a porous engineering thermoplastic material which is biocompatible with, and conducive for, the ingrowth of bone spicules, said process comprising fabricating said device from a particulate bioengineering thermoplastic material selected from the group consisting of polysulfones, polyphenylenesulfides, polyacetals, thermoplastic polyesters, polycarbonates, aromatic polyamides, aromatic polyamideimides, thermoplastic polyimides, polyaryletherketones, polyarylethernitriles and aromatic polyhydroxyethers, said thermoplastic material having at least one fraction of a biomodal distribution of average particle diameters within the range from about 7:1 to about 5:1, by heating said particulate thermoplastic material at a temperature and time sufficient to sinter said material to provide a porous device having a porosity, pore diameter and pore interconnections which enables such device to become firmly and permanently anchored into a musculoskeletal system in which it is employed by tissue ingrowth into the porous device,
Dependencies are inferred from the claim text.