Intervertebral body fusion device
First Claim
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1. An intervertebral body fusion device comprising:
- a cage component includinga rigid upper member defining a bearing surface, an opposing interior surface and a through passage confined by said upper member;
a rigid lower member defining a bearing surface, an opposing interior surface, and a through passage confined by said lower member;
a resilient web bridging said upper member and said lower member and defining a living hinge, said web spacing said members from one another thereby defining a gap of a predetermined distance for receiving a wedge body between said members;
a first spine having a free end and a depending end, said first spine having a tooth, said depending end depending from said upper member and disposing said tooth below said bearing surface, and said first spine further positioning said tooth in registry with said through passage of said upper member;
a wedge body dimensioned and configured to be received and substantially housed in said gap, said wedge body having a predetermined diameter greater than the predetermined distance of said gap, whereby said upper and lower members become urged apart when said wedge body is inserted into said gap; and
a contraction means for drawing said wedge body into said gap so as to nest within said cage component.
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Abstract
An intervertebral body fusion device has a wedge body, a cage component with a plurality of deployable spines having end plate penetrating teeth, and a contraction mechanism for drawing the wedge body into the cage component. The device is surgically placed intervertebrally into the spine from an anterior surgical approach. In its final surgically-implanted position, the wedge body is substantially fully drawn within the cage component, resulting in a full deployment of teeth and associated spines into the adjacent end plates of the vertebral bodies, while simultaneously restoring the angle of lordosis to the spine.
1119 Citations
20 Claims
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1. An intervertebral body fusion device comprising:
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a cage component including a rigid upper member defining a bearing surface, an opposing interior surface and a through passage confined by said upper member; a rigid lower member defining a bearing surface, an opposing interior surface, and a through passage confined by said lower member; a resilient web bridging said upper member and said lower member and defining a living hinge, said web spacing said members from one another thereby defining a gap of a predetermined distance for receiving a wedge body between said members; a first spine having a free end and a depending end, said first spine having a tooth, said depending end depending from said upper member and disposing said tooth below said bearing surface, and said first spine further positioning said tooth in registry with said through passage of said upper member; a wedge body dimensioned and configured to be received and substantially housed in said gap, said wedge body having a predetermined diameter greater than the predetermined distance of said gap, whereby said upper and lower members become urged apart when said wedge body is inserted into said gap; and a contraction means for drawing said wedge body into said gap so as to nest within said cage component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An intervertebral body fusion device comprising:
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a cage component including a rigid upper member defining a bearing surface, an opposing interior surface and a through passage confined by said upper member; a rigid lower member defining a bearing surface, an opposing interior surface, and a through passage confined by said lower member, said lower member attached to said upper member and disposed apart to define a gap of a predetermined distance for receiving a wedge body between said members; a first spine having a tooth, said first spine depending from said upper member and disposing said tooth within said gap proximate said interior surface of said upper member, and further positioning said tooth in registry with said through passage of said upper member; a wedge body defining a first inclined surface and an opposing second inclined surface defining a predetermined fixed angle relative to each other, said wedge body dimensioned and configured to be received and substantially housed in said gap, said wedge body having a predetermined diameter greater than the predetermined distance of said gap such that said upper and lower members become urged apart when said first and second inclined surfaces wedge against respective interior surfaces of said upper and lower members; and a contraction means for drawing said wedge body into said gap so as to nest within said cage component; whereby, when said wedge body engages said spine upon insertion into said gap, said wedge body deploys said spine and said tooth by driving said tooth through said through passage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification