Cementless fixation element for an artificial hip joint with rotating cover element
First Claim
1. A fixation element for receiving a socket component of an artificial hip joint, comprising:
- a frontal region for facing a pelvic bone and having a screw-threaded central bore to receive an insertion tool and said frontal region having at least one aperture therein;
a first conically tapering wall located adjacent said frontal region and having an outer surface including a self-tapping screw thread for cementless fixation of the element in the pelvic bone;
a second conically tapering wall disposed between said frontal region and said first conically tapering wall;
a cover element to close said at least one aperture defined by the frontal region, said cover element engages to an inner surface of said frontal region and having a rotational axis perpendicular to said frontal region, said cover element being rotated on said axis.
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Accused Products
Abstract
A metal fixation element is disclosed for receiving a plastic socket component of an artificial hip joint. The fixation element includes a frontal region which faces the pelvic bone. The frontal region has a central bore, with a screw thread to receive an insertion tool. The element also includes at least one conically tapering wall spaced from the frontal region. A self-tapping screw thread on the outer surface of the tapering wall provides for cementless fixation of the element in the pelvic bone. There is further provided an additional conically tapering wall between the frontal region and the first conically tapering wall. Three apertures are located in the frontal region. A cover element is rotatably mounted within the fixation element closely abutting the frontal region. The cover element has three equally spaced openings separated by continuous positions for selective opening and closing of the three apertures in the frontal region.
27 Citations
15 Claims
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1. A fixation element for receiving a socket component of an artificial hip joint, comprising:
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a frontal region for facing a pelvic bone and having a screw-threaded central bore to receive an insertion tool and said frontal region having at least one aperture therein; a first conically tapering wall located adjacent said frontal region and having an outer surface including a self-tapping screw thread for cementless fixation of the element in the pelvic bone; a second conically tapering wall disposed between said frontal region and said first conically tapering wall; a cover element to close said at least one aperture defined by the frontal region, said cover element engages to an inner surface of said frontal region and having a rotational axis perpendicular to said frontal region, said cover element being rotated on said axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification