Variable angle locking implant
First Claim
Patent Images
1. An implant comprising:
- a first surface;
a second surface; and
at least one opening extending from the first surface to the second surface, the at least one opening having an inner surface including a first plate member including a plurality of upper fins and a second plate member including a plurality of lower fins, wherein the plurality of upper fins define an upper, circumferential edge to contact a head of a bone fastener in use and the plurality of lower fins define a lower, circumferential edge to contact the head of the bone fastener in use, the plurality of upper fins are positioned closer to the first surface of the implant and the plurality of lower fins are positioned closer to the second surface of the implant; and
wherein at least one of the plurality of upper fins and the plurality of lower fins are adapted and configured to deform in order to secure a position of the head of the bone fastener inserted into the at least one opening; and
wherein the at least one opening has a radius between the inner surface and a top surface of the upper fins, and each fin tapers in thickness from the inner surface towards a terminal end.
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Abstract
A variable angle locking implant includes a bone plate having a lower surface, an upper surface, and at least one opening extending from the lower surface to the upper surface along an axis. The opening has a plurality of fins oriented along a plane. The axis is non-perpendicular to a tangent of a projection of the lower surface across the opening, the tangent defined at the intersection between the axis and the projected lower surface, and/or the plane is non-parallel to the tangent. The implant includes at least one fastener, and the plurality of fins are deflectable relative to a head portion of the fastener such that the fastener can be inserted and retained at any one of a plurality of angles.
339 Citations
15 Claims
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1. An implant comprising:
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a first surface; a second surface; and at least one opening extending from the first surface to the second surface, the at least one opening having an inner surface including a first plate member including a plurality of upper fins and a second plate member including a plurality of lower fins, wherein the plurality of upper fins define an upper, circumferential edge to contact a head of a bone fastener in use and the plurality of lower fins define a lower, circumferential edge to contact the head of the bone fastener in use, the plurality of upper fins are positioned closer to the first surface of the implant and the plurality of lower fins are positioned closer to the second surface of the implant; and wherein at least one of the plurality of upper fins and the plurality of lower fins are adapted and configured to deform in order to secure a position of the head of the bone fastener inserted into the at least one opening; and wherein the at least one opening has a radius between the inner surface and a top surface of the upper fins, and each fin tapers in thickness from the inner surface towards a terminal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implant comprising:
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a first surface; a second surface; and an opening extending from the first surface to the second surface, the opening having an inner surface including a first plate member including a plurality of upper fins and a second plate member including a plurality of lower fins, wherein the plurality of upper fins define an upper, circumferential surface including a series of concave and convex surfaces to contact a head of a fastener in use and the plurality of lower fins define a lower, circumferential surface including a series of concave and convex surfaces to contact the head of the fastener in use, the plurality of upper fins are positioned closer to the first surface of the implant and the plurality of lower fins are positioned closer to the second surface of the implant; and wherein at least one of the plurality of upper fins and the plurality of lower fins are adapted and configured to deform in order to secure a position of the head of the fastener in use; and wherein the opening has a radius between the inner surface and a top surface of the upper fins, and each fin tapers in thickness from the inner surface towards a terminal end.
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15. An implant comprising:
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a first surface; a second surface; and an opening extending from the first surface to the second surface, the opening having an inner surface including an integrally formed first plate member including a plurality of integrally formed upper fins and an integrally formed second plate member including a plurality of integrally formed lower fins, wherein the plurality of upper fins define an upper, circumferential surface including a series of concave and convex surfaces to contact a head of a fastener in use and the plurality of lower fins define a lower, circumferential surface including a series of concave and convex surfaces to contact the head of the fastener in use, the plurality of upper fins are positioned closer to the first surface of the implant and the plurality of lower fins are positioned closer to the second surface of the implant; and wherein at least one of the plurality of upper fins and the plurality of lower fins are adapted and configured to deform in order to secure a position of the head of the fastener in use; and wherein the opening has a radius between the inner surface and a top surface of the upper fins, and each fin tapers in thickness from the inner surface towards a terminal end.
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Specification