OFFSET RADIUS LORDOSIS
First Claim
1. A spinal implant for posterior or lateral placement between adjacent vertebrae comprising a first vertebrae and a second vertebrae, the implant comprises:
- a first dimension in a first direction;
a second dimension in a second direction substantially orthogonal to the first direction and less than the first dimension;
a first bearing surface configured to abut the first vertebrae;
a second bearing surface configured to abut the second vertebrae;
a compound curve comprising a first radius and a second radius orthogonal to the first radius and defining at least one of the first bearing surface and the second bearing surface;
a first cavity and a second cavity configured to extend through at least the first bearing surface and the second bearing surface; and
an intermediate member interposed between the first cavity and the second cavity.
9 Assignments
0 Petitions
Accused Products
Abstract
A vertebral body replacement or spacer that re-creates a lordosis angle (or other angle) of a human spine. An embodiment of the spacer may comprise contoured superior and inferior bearing surfaces. More particularly, the contoured surfaces may be defined by compound curves such as two radii substantially orthogonal to each other. As a result, the bearing surfaces may conform to the convex end plates of adjacent vertebra. In another embodiment, the present invention may provide a method of establishing a lordosis angle. The method may comprise inserting a spacer into an intervertebral space and positioning the spacer in such a manner that the contoured surfaces generally correspond to the end plates of the adjacent vertebra. However, the spacers and methods of the embodiments of the present invention may be used to re-create other angles in the human spine.
366 Citations
20 Claims
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1. A spinal implant for posterior or lateral placement between adjacent vertebrae comprising a first vertebrae and a second vertebrae, the implant comprises:
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a first dimension in a first direction; a second dimension in a second direction substantially orthogonal to the first direction and less than the first dimension; a first bearing surface configured to abut the first vertebrae; a second bearing surface configured to abut the second vertebrae; a compound curve comprising a first radius and a second radius orthogonal to the first radius and defining at least one of the first bearing surface and the second bearing surface; a first cavity and a second cavity configured to extend through at least the first bearing surface and the second bearing surface; and an intermediate member interposed between the first cavity and the second cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A spinal implant for posterior or lateral placement between a first vertebral plate and a second vertebral plate of adjacent vertebrae, the implant comprises:
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an implant body that comprises; a length greater than a width of the implant body; a first bearing surface configured to abut the first vertebral plate, a second bearing surface configured to abut the second vertebral plate, a first radius defining the first bearing surface in a first direction along the implant; a second radius defining the first bearing surface in a second direction along the implant and substantially orthogonal to the first direction; a first and second cavity open to at least the first bearing surface and the second bearing surface; and an intermediate member interposed between the first and the second cavity. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A spinal implant for placement within an intervertebral space between a first vertebrae and an adjacent second vertebrae, the implant comprises:
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a first cross-section of an implant body in a first direction along the implant that comprises; a first superior bearing surface configured to abut the first vertebrae, a first inferior bearing surface configured to abut the second vertebrae, and a first radius in the first direction defining at least one of the first superior bearing surface and the first inferior bearing surface; and a second cross-section of the implant body in a second direction along the implant substantially orthogonal to the first direction that comprises; a second superior bearing surface configured to abut the first vertebrae, a second inferior surface configured to abut the second vertebrae, and a second radius in the second direction defining at least one of the second superior bearing surface and the second inferior bearing surface; a first cavity configured to establish a communicative pathway through the implant, between the first vertebrae and the second vertebrae; a second cavity configured to establish a communicative pathway through the implant, between the first vertebrae and the second vertebrae; and an intermediate member between the first and the second cavity. - View Dependent Claims (18, 19, 20)
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Specification