Intervertebral Implant for Transforminal Posterior Lumbar Interbody Fusion Procedure
First Claim
1. An intervertebral implant sized and configured for implantation between a first and second vertebra via transforaminal lumbar interbody fusion technique, the implant comprising:
- a body substantially made of allograft, the body including a curved posterior face, a curved anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant;
a pair of narrow ends separating the posterior and anterior faces and superior and inferior surfaces for contacting at least a portion of the first and second vertebral, the superior and inferior surfaces include a plurality of teeth formed; and
at least one non-threaded, horizontal channel configured and adapted for engagement by an implant insertion tool, the channel disposed along at least a portion of the curved posterior face or disposed along at least a portion of the curved anterior face.
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Accused Products
Abstract
An intervertebral implant for fusing vertebrae is disclosed. The implant may have a body with curved, posterior and anterior faces separated by two narrow implant ends, superior and inferior faces having a plurality of undulating surfaces for contacting vertebral endplates, and at least one depression in the anterior or posterior face for engagement by an insertion tool. The implant may also have one or more vertical through-channels extending through the implant from the superior face to the inferior face, a chamfer on the superior and inferior surfaces at one of the narrow implant ends, and/or a beveled edge along a perimeter of the superior and inferior faces. The implant configuration facilitates transforaminal insertion of the implant into a symmetric position about the midline of the spine so that a single implant provides balanced support to the spinal column. The implant may be formed of a plurality of interconnecting bodies assembled to form a single unit. An implantation kit and method are also disclosed.
254 Citations
37 Claims
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1. An intervertebral implant sized and configured for implantation between a first and second vertebra via transforaminal lumbar interbody fusion technique, the implant comprising:
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a body substantially made of allograft, the body including a curved posterior face, a curved anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant;
a pair of narrow ends separating the posterior and anterior faces and superior and inferior surfaces for contacting at least a portion of the first and second vertebral, the superior and inferior surfaces include a plurality of teeth formed; and
at least one non-threaded, horizontal channel configured and adapted for engagement by an implant insertion tool, the channel disposed along at least a portion of the curved posterior face or disposed along at least a portion of the curved anterior face. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An intervertebral implant sized and configured for implantation between a first and second vertebra via transforaminal lumbar interbody fusion technique, the implant comprising:
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a body having a curved posterior face, a curved anterior face, a pair of curved ends separating the posterior and anterior faces and superior and inferior faces for contacting at least a portion of the first and second vertebra, the superior and inferior faces defining a thickness of the implant;
wherein the body includes at least one vertical through-channel extending from the superior face to the inferior face; and
the anterior and posterior faces include at least two non-threaded, horizontal channels configured and adapted for engagement by an implant insertion tool, one of the channels being disposed along at least a portion of the curved posterior face, the other of said channels being disposed along at least a portion of the curved anterior face, wherein the channels each include at least two recesses for engaging a corresponding projection formed on the insertion tool. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An intervertebral implant for posterior insertion via a transforaminal window comprising:
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curved, substantially parallel posterior and anterior faces, the posterior and anterior faces extending along a longitudinal axis of the implant;
a pair of convex narrow ends separating the posterior and anterior faces;
superior and inferior faces for contacting upper and lower vertebral endplates, the superior and inferior faces defining a thickness of the implant;
at least one depression in the anterior or posterior face for engagement by an insertion tool; and
at least two vertical through-channels extending through the implant from the superior face to the inferior face, each vertical through-channel having a width and walls on posterior and anterior sides of the width, the walls on the posterior and anterior sides of the width of the vertical through-channels having a thickness greater than the width of the vertical through channels;
- View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. An intervertebral implant sized and configured for implantation between a first and second vertebra via transforaminal lumbar interbody fusion technique, the implant comprising:
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curved posterior and anterior faces, the posterior and anterior faces extending along a longitudinal axis of the implant;
a pair of arcuate ends separating the posterior and anterior faces;
superior and inferior surfaces for contacting at least a portion of the first and second vertebral, the superior and inferior faces defining a thickness of the implant;
at least one vertical through-channel extending from the superior surface to the inferior surface, the at least one vertical through-channel defining a first wall between the anterior face and the vertical through-channel and a second wall between the posterior face and the vertical through channel, the first and second walls having a wall width, the vertical through channel having a channel width, the wall width being greater than the channel width.
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Specification