ORTHOPEDIC IMPLANTS HAVING GRADIENT POLYMER ALLOYS

• Main Authors: JAASMA, Michael J, MYUNG, David, KOURTIS, Lampros, HARTDEGEN, Vernon, ROBERTS, Jeffrey G
• Format: Patent
• Language: English; French; German
• Published: 25.10.2017
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; BLASTING; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HEATING; HUMAN NECESSITIES; HYGIENE; LIGHTING; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PROSTHESES; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; TREATMENT OR PROTECTION OF EYES OR EARS; WEAPONS

An orthopedic implant comprises: a bone interface member comprising a metal having a bone contact surface; and a water swellable IPN or semi-IPN member having a bearing surface and an attachment zone, the attachment zone being attached by a chemical linkage to the bone interface member, the water swellable IPN or semi-IPN member comprising a hydrophobic thermoset or thermoplastic polymer first network comprising a polyurethane and an ionic polymer second network comprising sulfonic acid functional groups configured to exhibit a compositional gradient between the bearing surface and the attachment zone.