Intervertebral disc implant

Patent metadata

Field	Value
Publication number	US-10080667-B2
Application number	US-201715639416-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Sep 15, 2006
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

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.

First claim

What is claimed is:

1. An intervertebral disc implant for being inserted into an intervertebral space between adjacent upper and lower vertebral bones, comprising:
a first bearing member;
a body of the first bearing member having an outer bearing surface for being disposed adjacent one of the upper and lower vertebral bones;
a rotary securing member rotatably mounted to the first bearing member to be carried by the first bearing member, so that the rotary securing member extends along the outer bearing surface of the first bearing member prior to being inserted into the intervertebral space, and is inserted together with the first bearing member into the intervertebral space, and after insertion of the rotary securing member and the first bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the first 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 of the rotary shaft extending generally transversely therefrom 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 bone-engaging portions of the rotary shaft to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone to a deployed orientation with the bone-engaging portions including the distal arc-shaped edge portions thereof in engagement with the adjacent vertebral bone;
wherein at least one of the plate-like bone-engaging portions comprises a leading edge that extends outwardly from the rotary shaft in a direction transverse to the longitudinal axis of the rotary shaft and terminates at an end of the distal arc-shaped edge portion for leading the distal arc-shaped edge portion into the adjacent vertebral bone as the bone-engaging portion is rotated into the deployed orientation.

2. The intervertebral disc implant of claim 1 , 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.

3. The intervertebral disc implant of claim 1 , further comprising a second bearing member, wherein the first bearing member is one of an upper and a lower bearing member and the second bearing member is the other of an upper and lower bearing member; and
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 the upper and lower vertebral bones.

4. The intervertebral disc implant of claim 1 , wherein the plurality of spaced-apart plate-like bone-engaging portions include first, second, and third bone-engaging portions each fixedly disposed on the rotary shaft and spaced apart along the longitudinal axis from the other bone engaging portions for engaging with the adjacent vertebral bone to secure the first bearing member relative thereto.

5. The intervertebral disc implant of claim 1 , wherein when in the undeployed orientation, the plurality of bone-engaging portions are disposed within the body of the first bearing member such that they do not protrude outside of the outer bearing surface thereof.

6. The intervertebral disc implant of claim 1 , wherein the body of the first bearing member includes a plurality of spaced apart recesses sized and configured to receive the corresponding plurality of bone-engaging portions when the bone-engaging portions are in the undeployed orientation.

7. The intervertebral disc implant of claim 1 , wherein the plurality of bone-engaging portions are formed on the rotary shaft, such that the rotary securing member is monolithic.

8. The intervertebral disc implant of claim 1 , wherein the distal arc-shaped edge portion subtends an angle of at least 90 degrees.

9. The intervertebral disc implant of claim 1 , wherein the leading edge and the distal arc-shaped edge portion of the at least one plate-like bone-engaging portion meet to form a corner of the at least one bone-engaging portion.

10. An intervertebral disc implant for being inserted into an intervertebral space between adjacent upper and lower vertebral bones, comprising:
a first bearing member;
a body of the first bearing member having an outer bearing surface for being disposed adjacent one of the upper and lower vertebral bones;
a rotary securing member rotatably mounted to the first bearing member to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the first bearing member prior to being inserted into the intervertebral space, and is inserted together with the first bearing member into the intervertebral space, and after insertion of the rotary securing member and the first bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the first bearing member to the adjacent vertebral bone;
a rotary shaft of the securing member having a longitudinal axis; and
at least one plate-like bone-engaging portion of the rotary shaft extending generally transversely therefrom 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 portion about the longitudinal axis to allow the bone-engaging portion of the rotary shaft to be rotated from an undeployed orientation with the bone-engaging portion out of engagement with the adjacent vertebral bone to a deployed orientation with the bone-engaging portion including the distal arc-shaped edge portion thereof in engagement with the adjacent vertebral bone;
wherein the plate-like bone-engaging portion comprises 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.

11. The intervertebral disc implant of claim 10 , further comprising an additional plate-like bone-engaging portion that extends transversely to the longitudinal axis of the rotary shaft and is parallel to the at least one bone-engaging portion.

12. The intervertebral disc implant of claim 10 , wherein the securing member is connected to the first bearing member via a friction fit.

13. The intervertebral disc implant of claim 10 , further comprising a second bearing member, wherein the first bearing member is one of an upper and a lower bearing member and the second bearing member is the other of an upper and lower bearing member;
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.

14. An intervertebral disc implant for being inserted into an intervertebral space between adjacent upper and lower vertebral bones, comprising:
an

Assignees

• Pioneer Surgical Tech Inc

Inventors

• Trudeau Jeffrey L
• Janowski Brian Patrick
• Kilpela Thomas
• Jackson Michael R
• Bao Qi-Bin

Classifications

• A61F2002/30845

  with cutting edges · CPC title

• A61F2002/30492

  using a locking pin · CPC title

• A61F2310/00407

  Coating made of titanium or of Ti-based alloys · CPC title

• A61F2002/30899

  Protrusions pierced with apertures · CPC title

• A61F2230/0004

  Rounded shapes, e.g. with rounded corners · CPC title