MELT-STABILIZED ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE AND METHOD OF MAKING THE SAME

Various embodiments disclosed relate to melt-stabilized materials including ultra high molecular weight polyethylene (UHMWPE), methods of making the same, and medical implants including the same. In various embodiments, the present invention provides a method of melt-stabilizing a material including...

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Bibliographische Detailangaben
1. Verfasser:	PLETCHER, DIRK
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 GENERAL PROCESSES OF COMPOUNDING HUMAN NECESSITIES HYGIENE MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL ORGANIC MACROMOLECULAR COMPOUNDS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS PROSTHESES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	Various embodiments disclosed relate to melt-stabilized materials including ultra high molecular weight polyethylene (UHMWPE), methods of making the same, and medical implants including the same. In various embodiments, the present invention provides a method of melt-stabilizing a material including UHMWPE. The method includes obtaining or providing a solid material including UHMWPE including a first concentration of free-radicals. The method includes coating at least part of the solid material with a liquid composition including at least one antioxidant, to provide a coated solid material. The method includes heating the coated solid material in an environment including oxygen, the heating being sufficient to melt at least part of the UHMWPE, to provide a heated material. The method also includes solidifying the heated material, to provide a melt-stabilized material including UHMWPE including a second concentration of free-radicals, wherein the second concentration of free-radicals is less than the first concentration of free-radicals. Divers modes de réalisation selon l'invention concernent des matériaux stabilisés à l'état fondu dont un polyéthylène à poids moléculaire ultra-élevé (UHMWPE), leurs procédés de fabrication, et des implants médicaux les contenant. Dans divers modes de réalisation, cette invention concerne un procédé de stabilisation à l'état fondu d'un matériau contenant un UHMWPE. Le procédé comprend l'obtention ou la fourniture d'un matériau solide contenant un UHMWPE présentant une première concentration de radicaux libres. Le procédé comprend le revêtement d'au moins une partie du matériau solide avec une composition liquide contenant au moins un antioxydant, pour obtenir un matériau solide revêtu, et le chauffage du matériau solide revêtu dans un environnement contenant de l'oxygène, le chauffage étant suffisant pour faire fondre au moins en partie l'UHMWPE et obtenir un matériau chauffé. Le procédé peut également comprendre la solidification du matériau chauffé, pour obtenir un matériau stabilisé à l'état fondu contenant un UHMWPE présentant une seconde concentration de radicaux libres, ladite seconde concentration de radicaux libres étant inférieure à la première.