Bone alignment and fixation device and installation method
First Claim
1. A clip to inter-connect primary and secondary bone zones having edges, comprising in combination:
- a) a tab to extend over and generally parallel to a surface of the secondary bone zone, and above a first level defined by that surface, and b) a first projection configured to penetrate the primary bone zone at the edge thereof, and below said first level, c) there being an extension of the tab projecting below said first level, said extension carrying the first projection, d) said extension including a movable arcuate arm portion.
1 Assignment
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Accused Products
Abstract
This invention concerns a device, and instruments for its insertion, that aligns two sections of bone and fixates the two sections to one another. The alignment feature and the fixation feature are typically independent, but they are incorporated into one device. The device is particularly well adapted to the alignment and fixation of a fragment of cranial bone with the remainder of the cranium. The device can be applied to a cranial bone fragment, and it allows the bone fragment to be aligned with the outer cortex of the cranium; prevents the bone fragment from entering the cranial cavity; and if desired, fixates the bone fragment to the cranium. The device may take the form of a clip having a tab to surface engage one section of bone, two projections to respectively engage edge portions of two bone sections, and an S-shaped flange integral with the tab and at least one of the projections.
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Citations
58 Claims
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1. A clip to inter-connect primary and secondary bone zones having edges, comprising in combination:
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a) a tab to extend over and generally parallel to a surface of the secondary bone zone, and above a first level defined by that surface, and b) a first projection configured to penetrate the primary bone zone at the edge thereof, and below said first level, c) there being an extension of the tab projecting below said first level, said extension carrying the first projection, d) said extension including a movable arcuate arm portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 52)
i) titanium ii) titanium alloy iii) an alloy consisting essentially of titanium, aluminum and vanadium iv) an alloy consisting essentially of;
about 90% by weight of titanium about 6% by weight of aluminum about 4% by weight of vanadium.
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36. The combination of claim 2 wherein said tab includes an arm portion extending in the direction of said projection, and carrying said extension of the tab that projects below said first level.
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52. The combination of claim 7 wherein the first projection has barbs thereon spaced apart in said directions.
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37. The method of using a clip to interconnect primary and secondary bone zones having edges, the clip comprising
a) a tab to extend over and generally parallel to a surface of the secondary bone zone, and above a level defined by that surface, and b) a first projection carried by the tab and configured to penetrate the primary bone zone at the edge thereof, and below said first level, said method including the steps i) advancing the first projection to penetrate said primary bone zone, ii) and locating the tab to extend over said surface of the secondary bone zone, and attaching the tab to said surfaces c) there being an extension of the tab projecting below said first level, said extension carrying the first projection, d) said extension including a movable arcuate arm portion.
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47. A cranial clip comprising, in combination
a) a clip having a support plate, b) a flange integral with the plate and extending away from the plate, the flange having bowed configuration, c) at least one push-in tang integral with and protruding from the flange and extending generally parallel to the plate, in spaced relation to the plate, d) said tang having a sharp tip to be pushed into cranial soft bone tissue proximate an edge of the cranium, e) there being an extension of the flange projecting below said first level, said extension carrying the first projection, f) said extension including a movable arcuate portion.
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51. A clip having a tab to surface engage one section of bone, two projections to respectively engage edge portions of two bone sections, and an S-shaped flange integral with the tab and at least one of the projections.
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53. A clip to inter-connect primary and secondary bone zones having edges, comprising in combination:
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a) a tab to extend over and generally parallel to a surface of the secondary bone zone, and above a first level defined by that surface, b) a first projection carried by the tab and configured to penetrate the primary bone zone at the edge thereof, and below said first level, c) and including an extension of the tab projecting below said first level, said extension carrying the first projection, d) and wherein said extension has an arm movable relative to the tab, the first projection carried by that arm. - View Dependent Claims (54, 55, 56)
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57. Apparatus to prevent a bone fragment from entering the cranial cavity, during positioning of said fragment at an opening in the cranium, comprising
a) a carrier for the bone fragment, and b) an aligner on the carrier to engage a surface or surfaces of the cranium during positioning of the bone fragment relative to said cranial opening, c) the carrier including: -
i) a tab to extend over and generally parallel to a surface of the cranium, and above a first level defined by that surface, and ii) a first projection configured to penetrate the cranium at the edge thereof, and below said first level, iii) there being an extension of the tab projecting below said first level, said extension carrying the first projection, iii) said extension including a movable arcuate arm portion. - View Dependent Claims (58)
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Specification