Joint prosthesis having controlled rotation
AssigneeJohnson & Johnson Professional, Inc.
InventorsMichael J. O'Neil, Arnold Oyola, Edward J. Cheal
Life of this patent
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Abstract
A joint prosthesis system includes first and second components that are joinable to each other in a manner to inhibit the rotation of the second component relative to the first component. The prosthesis system includes a rotation-inhibiting mechanism that has at least circumferential groove formed in one of a portion of the first component and a portion of the second component and at least one rib formed on the other of the first component and the second component. In one embodiment the rib may be eccentric, and the groove and the rib are matable with each other upon mounting of the second component within the first component.
Claims16
A joint prosthesis system, comprising:
- a first component having a superior mounting surface and an inferior bone contacting surface, the superior mounting surface having a cavity defined by inner side and distal walls;
- a second component, rotatable with respect to the first component, having a superior articulation surface, an inferior mating surface and a mating stem protruding from the inferior mating surface, wherein the mating stem is integrally formed of the same material from which the second component is formed;
- a securing mechanism comprising at least one groove formed in one of the cavity of the first component and the mating stem of the second component, and at least one eccentric rib formed on and protruding from a surface of the other of the cavity of the first component and the mating stem of the second component, the at least one groove and the at least one eccentric rib being matable with each other upon mounting of the second component within the first component to provide positive axial securement of the second component relative to first component and to enable rotation of the second component relative to the first component.
Dependencies are inferred from the claim text.