Artificial joint, particularly an artificial hip joint

PCT No. PCT/CH97/00090 Sec. 371 Date Oct. 1, 1998 Sec. 102(e) Date Oct. 1, 1998 PCT Filed Mar. 6, 1997 PCT Pub. No. WO97/38650 PCT Pub. Date Oct. 23, 1997With the invention, a geometry is described which makes it possible to use similar, wear-resistant, metallic materials such as PROTASUL 21 WF for...

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Hauptverfasser:	SEMLITSCH, MANFRED
Format:	Patent
Sprache:	eng
Schlagworte:	BANDAGES, DRESSINGS OR ABSORBENT PADS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION GRINDING HUMAN NECESSITIES HYGIENE MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MEDICAL OR VETERINARY SCIENCE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PERFORMING OPERATIONS POLISHING PROSTHESES TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS
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Zusammenfassung:	PCT No. PCT/CH97/00090 Sec. 371 Date Oct. 1, 1998 Sec. 102(e) Date Oct. 1, 1998 PCT Filed Mar. 6, 1997 PCT Pub. No. WO97/38650 PCT Pub. Date Oct. 23, 1997With the invention, a geometry is described which makes it possible to use similar, wear-resistant, metallic materials such as PROTASUL 21 WF for a bearing shell (1) and a joint ball (2) in a spherical bearing without micro-weldings and without excessive wear arising, while other properties such as toughness, stability of shape and elasticity can be exploited for the function. Micro-weldings of the similar metallic materials are largely prevented by a suitable relationship between the average radii Rm, rm of the bearing surfaces A and B as well as of the permissible deviations (12, 13) in shape and of the permissible roughness of the bearing surfaces.