Artificial spinal disc

Details Artificial spinal disc Artificial spinal disc

A - Human Necessities

61

F

A61F 2/44 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2313099

A spinal disc prosthesis (10) includes an upper rigid plate (20) having an outer perimeter (83) and a lower rigid plate (120) having an outer perimeter (183). A body (200) of elastomeric material is located between and bonded to upper and lower rigid plates (83, 183) and includes a main portion (201) and a peripheral portion (203). Upper and lower plates (83, 183) each have a curved convex plate surface (82, 182). Peripheral portion (203) has a first part (208) which is bonded to curved convex plate surfaces (82, 182) of upper and lower plates (20, 120) and extends toward main portion (201). First part (208) increases in thickness as first part (208) extends toward main portion (201).

L'invention concerne un disque intervertébral prothétique (10) comportant une plaque rigide supérieure (20) avec un contour extérieur (83) et une plaque rigide inférieure (120) avec un contour extérieur (183). Un corps (200) en matière élastomère est placé entre les plaques rigides supérieure et inférieure (83, 183), et fixé à celles-ci, et comporte une partie principale (201) et une partie périphérique (203). Les plaques supérieure et inférieure (83, 183) présentent chacune une surface convexe et courbe (82, 182). La partie périphérique (203) comporte une première partie (208) fixée aux surfaces convexes et courbes (82, 182) des plaques supérieure et inférieure (20, 120), et s'étendant vers la partie principale (201). L'épaisseur de la première partie (208) augmente à mesure que la première partie (208) s'étend vers la partie principale (201).

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