Mobile bearing total joint replacement

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/38 (2006.01) A61F 2/42 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2169813

A prosthetic component is provided for a condylar joint. The prosthetic component includes a platform having a bearing surface and a pair of side walls. The side walls include a pair of concave surfaces which face one another and define arcs of the same right circular cylinder. The prosthetic component also includes a plastic bearing having a bearing surface slidably engaged with the bearing surface of the platform. The bearing also includes thrust surfaces defining arcs of two right circular cylinders having radii less than the radius of the side wall surfaces of the platform. The thrust surfaces are spaced from one another to permit only limited sliding movement of the bearing in medial to lateral directions, but greater sliding movement in anterior to posterior directions.

Est décrite une prothèse pour articulation condylienne. La prothèse comporte une plate-forme ayant un palier et une paire de parois latérales. Les parois latérales incluent une paire de surfaces concaves qui se font face l'une à l'autre et définissent des arcs de même cylindre circulaire droit. La prothèse comporte également un appui en plastique ayant un palier qui peut se glisser dans le palier de la plate-forme. L'appui comprend aussi des surfaces de poussée définissant des arcs de deux cylindres circulaires droits ayant des rayons inférieurs au rayon des surfaces des parois latérales de la plate-forme. Les surfaces de poussée sont espacées les unes des autres pour permettre uniquement des mouvements de glissement limités de l'appui dans les directions internes et externes, mais des mouvements de glissement plus importants dans les directions antérieures et postérieures.

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