Proximal anchors for bone fixation system
First Claim
Patent Images
1. A bone fixation device, for securing a first bone fragment to a second bone fragment, comprising:
- an elongate pin, having a proximal end, a distal end and a first retention structure;
at least one distal anchor carried by the elongate pin; and
a proximal anchor, axially moveable with respect to the elongate pin and comprising a second retention structure;
wherein at least a portion of the second retention structure is moveable between a first position and a second position, the second position being located closer to a longitudinal axis of the elongate pin as compared to the first position so as to engage at least a portion of the first retention structure and prevent proximal movement of the proximal anchor with respect to the elongate pin while the first position allows distal movement of the proximal anchor with respect to the elongate pin; and
wherein the proximal anchor comprises a tubular body axially slidably carried on the elongate pin, an annular flange that defines an angular bone contacting surface and a plurality of slots which define a plurality of lever arms.
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Abstract
Disclosed is a bone fixation device of the type useful for connecting soft tissue or tendon to bone or for connecting two or more bones or bone fragments together. The device comprises an elongate body having a distal anchor thereon. An axially moveable proximal anchor is carried by the proximal end of the fixation device, to accommodate different bone dimensions and permit appropriate tensioning of the fixation device.
360 Citations
27 Claims
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1. A bone fixation device, for securing a first bone fragment to a second bone fragment, comprising:
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an elongate pin, having a proximal end, a distal end and a first retention structure;
at least one distal anchor carried by the elongate pin; and
a proximal anchor, axially moveable with respect to the elongate pin and comprising a second retention structure;
wherein at least a portion of the second retention structure is moveable between a first position and a second position, the second position being located closer to a longitudinal axis of the elongate pin as compared to the first position so as to engage at least a portion of the first retention structure and prevent proximal movement of the proximal anchor with respect to the elongate pin while the first position allows distal movement of the proximal anchor with respect to the elongate pin; and
wherein the proximal anchor comprises a tubular body axially slidably carried on the elongate pin, an annular flange that defines an angular bone contacting surface and a plurality of slots which define a plurality of lever arms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17)
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15. A bone fixation device, for securing a first bone fragment to a second bone fragment, comprising:
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an elongate pin, having a proximal end, a distal end and a first retention structure;
at least one distal anchor carried by the elongate pin; and
a proximal anchor, axially moveable with respect to the elongate pin and comprising a second retention structure;
wherein at least a portion of the second retention structure is moveable between a first position and a second position, the second position being located closer to a longitudinal axis of the elongate pin as compared to the first position so as to engage at least a portion of the first retention structure and prevent proximal movement of the proximal anchor with respect to the elongate pin while the first position allows distal movement of the proximal anchor with respect to the elongate pin; and
wherein the second retention structure comprises an annular ring positioned within an annular recess formed within the proximal anchor. - View Dependent Claims (16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification