Intervertebral disc implant

Patent metadata

Field	Value
Publication number	US-9693872-B2
Application number	US-201614991191-A
Country	US
Kind code	B2
Filing date	Jan 8, 2016
Priority date	Sep 15, 2006
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

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 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.

2. The intervertebral disc implant of claim 1 , wherein the plurality of spaced 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 one bearing member relative thereto.

3. 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 one bearing member such that they do not protrude outside of the outer bearing surface thereof.

4. The intervertebral disc implant of claim 1 , wherein the body 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.

5. The intervertebral disc implant of claim 1 , wherein the securing member is connected to the one bearing member via a friction fit.

6. The intervertebral disc implant of claim 1 , wherein at least one securing member is disposed on each of the upper and lower bearing members for fixing the bearing members relative to the adjacent vertebral bones.

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

10. The intervertebral disc implant of claim 9 , wherein the plurality of plate-like bone-engaging portions extend transversely to the longitudinal axis of the rotary shaft and are parallel to one another.

11. 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 bearin

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

• A61F2220/0025

  Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements · CPC title

• A61F2002/30579

  with mechanically expandable devices, e.g. fixation devices · CPC title

• A61F2002/30485

  plastically deformable · CPC title

• A61F2/30965

  Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping · CPC title