Expandable intervertebral implant with wedged expansion member
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Accused Products
Abstract
An artificial functional spinal unit including an expandable intervertebral implant that can be inserted via a posterior surgical approach and used with one or more facet replacement devices to provide an anatomically correct range of motion is described. Lordotic and non-lordotic expandable, articulating implants and cages are described, along with embodiments of facet replacement devices and instruments for insertion. Methods of insertion are also described.
638 Citations
179 Claims
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1-157. -157. (canceled)
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158. An intervertebral implant for a human spine, comprising:
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an upper body comprising an inferior surface and a superior surface, wherein the superior surface of the upper body is configured to engage a first vertebra of the human spine;
a lower body comprising a superior surface and an inferior surface, wherein the inferior surface of the lower body is configured to engage a second vertebra of the human spine;
an insert comprising a superior surface and an inferior surface, wherein the insert is configured to be positioned between the superior surface of the lower body and the inferior surface of the upper body before insertion of the intervertebral implant between the first vertebra and the second vertebra of the human spine, and wherein the insert comprises an angled portion; and
an expansion member comprising a first angled portion and a second angled portion, wherein the expansion member is configured such that the first angled portion engages the angled portion of the insert to increase a separation distance between the upper body and the lower body after insertion of the intervertebral implant between the first vertebra and the second vertebra. - View Dependent Claims (159, 160, 161, 162, 163, 164, 165, 166, 167, 168)
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169. An intervertebral implant for a human spine, comprising:
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an upper body comprising an inferior surface and a superior surface, wherein the superior surface of the upper body is configured to engage a first vertebra of the human spine;
a lower body comprising a superior surface and an inferior surface, wherein the inferior surface of the lower body is configured to engage a second vertebra of the human spine;
an insert comprising a superior surface and an inferior surface, wherein the insert is configured to be positioned between the superior surface of the lower body and the inferior surface of the upper body before insertion of the intervertebral implant between the first vertebra and the second vertebra of the human spine, and wherein the insert comprises an angled portion;
an expansion member comprising a substantially flat inferior surface, a substantially flat superior surface, a first angled portion, and a second angled portion; and
an advancing element comprising an angled portion, wherein the angled portion of the advancing element is configured to engage the second angled portion of the expansion member, advancing the expansion member such that the first angled portion of the expansion member engages the angled portion of the insert, thereby increasing a separation distance between the upper body and the lower body of the intervertebral implant. - View Dependent Claims (170, 171, 172, 173, 174, 175, 176, 177, 178, 179)
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Specification