Articulating interbody cage and methods thereof
First Claim
Patent Images
1. A device comprising:
- a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space;
a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space;
at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion,wherein when in a low profile configuration the hinge element folds inward, and when fully expanded in at least a first dimension to a high profile configuration, the hinge element is restricted from achieving an on-center and an over-center rotational position around the hinge element such that the device is biased to collapse inwardly upon compression loading; and
wherein when the device is in the high-profile configuration the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position.
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Abstract
Provided are devices, systems and methods related to articulating interbody cages. The device includes a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space, a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; and a first and second sidewall each rotatably coupled to both the caudal and cephalad plates. At least one of the first and second sidewalls includes a hinge element restricted from achieving an on-center or over-center rotational position around the hinge element upon dimensional expansion of the device in at least a first dimension.
50 Citations
26 Claims
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1. A device comprising:
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a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion, wherein when in a low profile configuration the hinge element folds inward, and when fully expanded in at least a first dimension to a high profile configuration, the hinge element is restricted from achieving an on-center and an over-center rotational position around the hinge element such that the device is biased to collapse inwardly upon compression loading; and wherein when the device is in the high-profile configuration the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A device comprising:
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a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion; and at least one brace element configured to be positioned within an interior of the device between the caudal and cephalad plates and the at least one sidewall of the device, wherein when in a low profile configuration the hinge element folds inward, and when expanded to a higher-profile configuration, the hinge element is restricted from achieving an on-center or over-center rotational position around the hinge element upon dimensional expansion of the device in at least a first dimension such that the device is biased to collapse inwardly upon compression loading; wherein the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position; and wherein the at least one brace element resists compressive loading of the device along an axis or axes extending between the caudal and cephalad plates via the restriction of at least one sidewall'"'"'s under-center rotated hinge element from displacing toward the interior of the device.
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24. A device comprising:
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a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall has an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion, wherein when in a low profile configuration the hinge element folds inward, and when expanded to a higher-profile configuration, the hinge element is restricted from achieving an on-center or over-center rotational position around the hinge element upon dimensional expansion of the device in at least a first dimension such that the device is biased to collapse inwardly upon compression loading; wherein the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position; wherein the first meeting edge surface has at least a first interlocking element configured to abut with at least one corresponding second interlocking element positioned on the second meeting edge surface when the device is in the higher-profile configuration; and wherein the first and second interlocking elements resist translational movement of the upper sidewall portion relative to the lower sidewall portion due to application of a compressive load or shear loading of the at least one sidewall when the device is fully dimensionally expanded and under compression between the first and second vertebral endplates.
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25. A device comprising:
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a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion; and an anterior buttress comprising a surface having a snap lock feature that engages one or both of the caudal and cephalad plates, wherein when in a low profile configuration the hinge element folds inward, and when expanded to a higher-profile configuration, the hinge element is restricted from achieving an on-enter or over-center rotational position around the hinge element upon dimensional expansion of the device in at least a first dimension such that the device is biased to collapse inwardly upon compression loading; and wherein the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position.
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26. A device comprising:
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a caudal plate configured to be positioned adjacent a first vertebral endplate within an intervertebral disc space; a cephalad plate configured to be positioned adjacent a second vertebral endplate within the intervertebral disc space; and at least one sidewall rotatably coupled to both the caudal and cephalad plates, wherein the at least one sidewall having an upper sidewall portion having a first meeting edge surface coupled by a hinge element to a second meeting edge surface of a lower sidewall portion, wherein the at least one sidewall is constructed of a radiolucent polymer material and the hinge element comprises a thin flexure bearing made from the polymer material allowing the upper and lower sidewall portions to bend or pivot along a line of the hinge element relative to each other, wherein when in a low profile configuration the hinge element folds inward, and when expanded to a higher-profile configuration, the hinge element is restricted from achieving an on-center or over-center rotational position around the hinge element upon dimensional expansion of the device in at least a first dimension such that the device is biased to collapse inwardly upon compression loading; and wherein the upper sidewall portion and the lower sidewall portion are aligned under-center relative to each other and angled towards an interval volume, and the first meeting edge surface abuts the second meeting edge surface thereby preventing further pivoting of the hinge element beyond an under-center rotational position.
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Specification