Spinal implant configured for lateral insertion
View Patent ↗The embodiments provide a spinal implant that is configured for lateral insertion into a patient's intervertebral disc space. The spinal implant may have a body having a tapered anterior portion and one or more apertures. The tapered anterior portion allows for concomitant distraction of soft tissue during insertion of the implant. In addition, at least some of the apertures are designed to permit a predetermined amount of nutation by a fixation element. The fixations elements that allow nutation enable the fixation element to toggle from one position to another, for example, during subsidence of the implant in situ.
1. A spinal implant comprising:
a body having an upper surface, a lower surface, an anterior portion, a posterior portion, a pair of substantially planar sidewalls extending in parallel between the upper and lower surfaces, and a central opening extending therethrough between the upper and lower surfaces to facilitate bony ingrowth therethrough, the upper surface and lower surface being non-parallel such that one of the pair of sidewalls has a greater height than the other sidewall to form a wedge-shaped body configured for lateral insertion between vertebral bodies of a patient's spine, the anterior portion comprising a leading edge formed from panels extending from the upper and lower surfaces at an angle relative to one another and converging at a sharpened tip to allow concomitant distraction of soft tissue during insertion; and
one or more apertures within the posterior portion of the body for receiving at least one fixation element, wherein at least one of the apertures is configured to permit a predetermined amount of nutation by a fixation element.
2. The spinal implant of claim 1 , further comprising one or more bores for receiving an imaging marker.
3. The spinal implant of claim 2 , wherein the imaging marker is rod-shaped.
4. The spinal implant of claim 1 , wherein at least one of the apertures is configured to permit about 25 to about 35 degrees of nutation by the fixation element.
5. The spinal implant of claim 1 , wherein at least one of the apertures is configured to permit about 20 to about 40 degrees of nutation by the fixation element.
6. The spinal implant of claim 1 , wherein at least one of the apertures is configured to permit about 15 to about 45 degrees of nutation by the fixation element.
7. The spinal implant of claim 1 , wherein at least one of the apertures is configured to permit about 22 to about 28 degrees of nutation by the fixation element.
8. The spinal implant of claim 1 , wherein the one or more apertures comprises a superior aperture extending superiorly and an inferior aperture extending inferiorly.
9. The spinal implant of claim 8 , wherein the superior aperture is configured to permit about 15 to about 45 degrees of nutation by a first fixation element and the inferior aperture is configured to rigidly lock to a second fixation element.
10. The spinal implant of claim 8 , wherein the inferior aperture is configured to permit about 15 to about 45 degrees of nutation by a first fixation element and the superior aperture is configured to rigidly lock to a second fixation element.
11. The spinal implant of claim 1 , further being configured to have a lordotic profile.
12. The spinal implant of claim 1 , further including anti-migration features.
13. The spinal implant of claim 12 , wherein the anti-migration features include teeth on the upper and lower surfaces of the body.