A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/42 (2006.01) A61F 2/30 (2006.01) A61F 2/00 (2006.01) A61F 2/46 (2006.01)
Patent
CA 2232068
A joint prosthesis designed to replace the carpometacarpal joint of the human thumb. A first element which replaces the articular portion of the first metacarpal mates with a second element which replaces the articular portion of the trapezium. Articulation of the said first and second elements is provided by abutting toroidal mating surfaces which are complementary sections of the surfaces of identical toruses having center hole diameters equal to the diameters of the tubes. Contact of the mating surfaces is only along a pair of curved lines in perpendicular planes providing open spaces for lubrication of the joint by biological fluids.
L'invention concerne une prothèse d'articulation carpométacarpienne du pouce. Cet implant comprend un premier élément qui remplace la partie articulaire du premier métacarpien qui s'adapte avec un second élément qui remplace la partie articulaire du trapèze. L'articulation du premier élément et du second élément en question est obtenue par mise en about des surfaces d'adaptation toroïdales qui sont des sections complémentaires des surfaces de torus identiques dont le trou central a un diamètre égal à celui du diamètre des tubes. Le contact entre les surfaces d'adaptation intervient uniquement le long d'une paire de lignes incurvées se trouvant dans des plans perpendiculaires, ce qui laisse des espaces dégagés pour la lubrification de l'articulation par les liquides biologiques.
Ascension Orthopedics Inc.
Macrae & Co.
LandOfFree
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