Intervertebral disc implant
First Claim
Patent Images
1. An intervertebral disc implant for being inserted between adjacent upper and lower vertebral bones, comprising:
- an upper bearing member;
a lower bearing member;
a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone;
a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone;
an articulation interface between the upper and lower bearing members for allowing relative movement therebetween with the bearing members configured to fit in an intervertebral space between upper and lower vertebral bones;
a rotary securing member rotatably mounted to one of the bearing members to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the one bearing member prior to being inserted into the intervertebral space, and is inserted together with the one bearing member into the intervertebral space, and after insertion of the rotary securing member and the one bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the one bearing member to the adjacent vertebral bone;
a rotary shaft of the securing member having a longitudinal axis; and
a plurality of spaced-apart plate-like bone-engaging portions extending generally transversely from the rotary shaft and each including a distal arc-shaped edge portion spaced from the rotary shaft such that rotation of the rotary shaft about the longitudinal axis causes a corresponding rotation of the bone-engaging portions about the longitudinal axis to allow the rotary shaft of the rotary securing member to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone and a deployed orientation with the bone-engaging portions including the distal arc-shaped edge portions thereof in imbedded engagement with the adjacent vertebral bone;
wherein each of the plurality of plate-like bone-engaging portions has opposing side face portions extending orthogonally from the rotary shaft relative to the longitudinal axis thereof and the distal arc-shaped edge portion spaced from the rotary shaft is disposed at an outermost extent of the opposing side portions.
9 Assignments
0 Petitions
Accused Products
Abstract
Systems and tools for inserting and securing an implant within the intervertebral space. An intervertebral disc implant with upper and lower bearing members with an articulation interface between the members for providing relative motion therebetween. The implant may be provided with various securing members for fixing the implant within the intervertebral space. A tool may be used to insert the implant, which includes a plurality of shiftable implant engaging members that are shiftable between non-engaging and engaging configurations to alternatively release or hold the implant.
328 Citations
19 Claims
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1. An intervertebral disc implant for being inserted between adjacent upper and lower vertebral bones, comprising:
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an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween with the bearing members configured to fit in an intervertebral space between upper and lower vertebral bones; a rotary securing member rotatably mounted to one of the bearing members to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the one bearing member prior to being inserted into the intervertebral space, and is inserted together with the one bearing member into the intervertebral space, and after insertion of the rotary securing member and the one bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; and a plurality of spaced-apart plate-like bone-engaging portions extending generally transversely from the rotary shaft and each including a distal arc-shaped edge portion spaced from the rotary shaft such that rotation of the rotary shaft about the longitudinal axis causes a corresponding rotation of the bone-engaging portions about the longitudinal axis to allow the rotary shaft of the rotary securing member to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone and a deployed orientation with the bone-engaging portions including the distal arc-shaped edge portions thereof in imbedded engagement with the adjacent vertebral bone; wherein each of the plurality of plate-like bone-engaging portions has opposing side face portions extending orthogonally from the rotary shaft relative to the longitudinal axis thereof and the distal arc-shaped edge portion spaced from the rotary shaft is disposed at an outermost extent of the opposing side portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An intervertebral disc implant for being inserted between adjacent upper and lower vertebral bones, comprising:
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an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween with the bearing members configured to fit in an intervertebral space between upper and lower vertebral bones; a rotary securing member rotatably mounted to one of the bearing members to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the one bearing member prior to being inserted into the intervertebral space, and is inserted together with the one bearing member into the intervertebral space, and after insertion of the rotary securing member and the one bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; and a plurality of spaced-apart plate-like bone-engaging portions extending generally transversely from the rotary shaft and each including a distal arc-shaped edge portion spaced from the rotary shaft such that rotation of the rotary shaft about the longitudinal axis causes a corresponding rotation of the bone-engaging portions about the longitudinal axis to allow the rotary shaft of the rotary securing member to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone and a deployed orientation with the bone-engaging portions including the distal arc-shaped edge portions thereof in imbedded engagement with the adjacent vertebral bone; wherein the plate-like bone-engaging portions each comprise a leading cutting edge that extends outwardly from the rotary shaft in a direction transverse to the longitudinal axis of the rotary shaft and terminates at the distal arc-shaped edge portion for cutting into the adjacent vertebral bone and leading the distal arc-shaped edge portion into the cut adjacent vertebral bone as the bone-engaging portion is rotated into the deployed orientation to create a groove in the adjacent vertebral bone sized to fit the bone-engaging portion therein. - View Dependent Claims (10)
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11. An intervertebral disc implant for being inserted between adjacent upper and lower vertebral bones, comprising:
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an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween with the bearing members configured to fit in an intervertebral space between upper and lower vertebral bones; a rotary securing member rotatably mounted to one of the bearing members to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the one bearing member prior to being inserted into the intervertebral space, and is inserted together with the one bearing member into the intervertebral space, and after insertion of the rotary securing member and the one bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; a plurality of spaced-apart plate-like bone-engaging portions extending generally transversely from the rotary shaft and each including a distal arc-shaped edge portion spaced from the rotary shaft such that rotation of the rotary shaft about the longitudinal axis causes a corresponding rotation of the bone-engaging portions about the longitudinal axis to allow the rotary shaft of the rotary securing member to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone and a deployed orientation with the bone-engaging portions including the distal arc-shaped edge portions thereof in imbedded engagement with the adjacent vertebral bone; and a securing member receiving portion extending outwardly from the outer bearing surface of the one bearing member having at least one pair of opposed arms that extend beyond the outer bearing surface and having opposing inner arcuate surface portions for retaining the rotary shaft therebetween with a friction fit. - View Dependent Claims (12)
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13. An intervertebral disc implant, comprising:
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an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween; a rotary securing member rotatably mounted to one of the bearing members for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; and a securing member receiving portion of the one bearing member having at least one pair of opposed arms extending outwardly from so as to extend beyond the outer bearing surface, and the at least one pair of opposed arms having a gap therebetween for receiving the rotary shaft and the gap being sized so that the at least one pair of opposed arms have a friction fit with the rotary shaft to retain the rotary shaft therein with at least a portion of the securing member extending beyond the outer bearing surface prior to the rotary securing member being rotated for securing the one bearing member to the adjacent vertebral bone. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An intervertebral disc implant, comprising:
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an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween; a rotary securing member rotatably mounted to one of the bearing members for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; and a securing member receiving portion of the one bearing member having at least one pair of opposed arms extending outwardly from the outer bearing surface, and the at least one pair of opposed arms having a gap therebetween for receiving the rotary shaft and the gap being sized so that the at least one pair of opposed arms have a friction fit with the rotary shaft to retain the rotary shaft therein; wherein the rotary shaft is configured to be rotated approximately 180 degrees from an undeployed orientation to a deployed orientation.
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Specification