Fusion cage
First Claim
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1. A system comprising a spinal fusion cage and at least one engagement member;
- the fusion cage comprising;
a first member comprising a first support portion configured to interface with at least a surface of a first vertebral body, wherein the first member defines a first channel; and
a second member comprising a second support portion configured to interface with at least a surface of a second vertebral body, wherein the second member defines a second channel, wherein,the first member and second member are configured to be operable to assume a collapsed position;
the first member and second member are configured to be operable to assume an expanded position;
the first channel and the second channel are offset in the collapsed position; and
the first channel and the second channel are aligned in the expanded position; and
the engagement member configured to be at least partially received by the first channel and the second channel, wherein the engagement member is also configured to simultaneously engage all of the first member, the second member, and neighboring vertebrae;
wherein the first channel is obliquely oriented with respect to the first support portion of the first member, and the second channel is obliquely oriented with respect to the second support portion of the second member.
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Abstract
A system comprising a fusion cage and at least one engagement member is provided. The fusion cage includes a first member and a second member. The engagement member is configured to retain the first and second members in an expanded state while simultaneously fixing the fusion case to adjacent vertebrae.
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Citations
13 Claims
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1. A system comprising a spinal fusion cage and at least one engagement member;
the fusion cage comprising; a first member comprising a first support portion configured to interface with at least a surface of a first vertebral body, wherein the first member defines a first channel; and a second member comprising a second support portion configured to interface with at least a surface of a second vertebral body, wherein the second member defines a second channel, wherein, the first member and second member are configured to be operable to assume a collapsed position; the first member and second member are configured to be operable to assume an expanded position; the first channel and the second channel are offset in the collapsed position; and the first channel and the second channel are aligned in the expanded position; and the engagement member configured to be at least partially received by the first channel and the second channel, wherein the engagement member is also configured to simultaneously engage all of the first member, the second member, and neighboring vertebrae; wherein the first channel is obliquely oriented with respect to the first support portion of the first member, and the second channel is obliquely oriented with respect to the second support portion of the second member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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positioning a first member and a second member in a space defined between two adjacent bodies, wherein the first member and the second member are configured to be in a collapsed position; moving at least one of the first member and the second member such that a first channel defined in the first member and a second channel defined in the second member, which are offset in the collapsed position, are aligned; and inserting an engagement member into the first channel, the second channel, and neighboring vertebrae; wherein inserting the engagement member into the first channel and the second channel comprises inserting at least a portion of the engagement member into at least one of the two adjacent bodies; and wherein inserting the engagement member comprises applying torsion force to the engagement member for enabling insertion. - View Dependent Claims (11, 12, 13)
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Specification