Joint prosthesis having ptfe cushion

Details Joint prosthesis having ptfe cushion Joint prosthesis having ptfe cushion

A - Human Necessities

61

F

A61F 2/42 (2006.01) A61L 27/16 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2179156

A joint prosthesis for interconnecting the ends of adjoining bones includes a cushion (61) of expanded PTFE having at least two facets (68, 69) for attachment to the bones. The cushion may or may not include stems (62 63) for insertion into the bones. An optional sheath (139) surrounds the non-facet surfaces of the cushion for preventing adherence of tissue. The motion of the prosthesis is defined or limited by the orientation of the facets and/or by the porosity of the cushion and or by an insert (123) within the cushion.

La présente invention concerne une prothèse articulaire reliant les deux extrémités d'os contigus. Cette prothèse, est constituée d'un coussin (61) en PTFE (polymère de tétrafluoroéthylène) expansé, qui comprend deux faces (68, 69) permettant la fixation sur l'os. Le coussin peut comporter ou ne pas comporter de pointes (62, 63) à embrocher dans les os. Un fourreau facultatif (139) entoure les surfaces autres que les faces du coussin pour empêcher l'adhérence des tissus. Le mouvement de la prothèse est défini ou limité par l'orientation des faces et/ou par la porosité du coussin et/ou par une pièce rapportée (123) placée dans le coussin.

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