Intervertebral spacer

Patent metadata

Field	Value
Publication number	US-11026803-B2
Application number	US-201816159926-A
Country	US
Kind code	B2
Filing date	Oct 15, 2018
Priority date	Oct 13, 2008
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

Disclosed is an assembly and method for implant installation between adjacent vertebral bodies of a patient. The implant has a support body and a rotatable insert therein and the support body is curved for installation between adjacent vertebral bodies transforaminally. An installation instrument is also disclosed for removable attachment to implant and engagement with the rotatable insert to selectively permit rotation between the insert and the support body. The installation instrument extends along a longitudinal tool axis and when the installation instrument is in a first position the insert is rotationally fixed with respect to the support body and when the installation instrument is in a second position the support body may rotate with respect to the insert.

First claim

We claim:

1. An assembly for implant installation between adjacent vertebral bodies of a patient, comprising:
an implant having a support body and a rotatable insert therein;
the support body having a proximal end portion and a distal end portion and the support body being configured and dimensioned for installation between adjacent vertebral bodies;
wherein the support body includes a superior surface and an inferior surface,
wherein the support body defines a longitudinal opening extending therethrough from the superior surface to the inferior surface and positioned in between the proximal end and the distal portion to accommodate the rotatable insert therein,
wherein the insert is rotatable about a central longitudinal axis within the longitudinal opening to permit the support body to rotate about the insert and the central longitudinal axis,
wherein in a first position the insert is rotationally fixed with respect to the support body and in a second position the support body may rotate with respect to the insert, and
wherein the insert includes a circumferential rib that mates to a corresponding indentation shaped on the support body,
wherein the support body further includes a groove that extends adjacent the proximal end portion and extends along an interior curved wall of the support body.

2. The assembly of claim 1 , further comprising an installation instrument removably attached to the proximal end portion of the support body and engageable with the rotatable insert to selectively permit rotation between the insert and the support body, the installation instrument extending along a longitudinal tool axis.

3. The assembly of claim 2 , wherein the insert defines a threaded hole extending transverse to the central longitudinal axis to engage with the installation instrument.

4. The assembly of claim 3 , further comprising an alignment member in a superior surface of the insert aligned with the hole.

5. The assembly of claim 1 , wherein the proximal end portion has a rounded shape and includes one or more grooves on lateral sides of the implant to engage installation instrument and wherein the grooves are in communication with the longitudinal opening to allow a part of insertion tool to engage the rotatable insert.

6. The assembly of claim 5 , wherein the installation instrument includes a central shaft having a threaded tip portion for threaded engagement with the rotatable insert.

7. The assembly of claim 6 , wherein the installation instrument comprises an implant stabilizer configured and dimensioned to engage the support body, an insert stabilizer configured and dimensioned to engage the rotatable insert, and wherein the central shaft extends through the implant and insert stabilizers.

8. The assembly of claim 7 , wherein the implant stabilizer has a generally cylindrical body extending from a proximal end to a distal end, and wherein the distal end comprises a forked free end having a pair of tongs spaced apart and extending distally therefrom and the tongs are configured and dimensioned to engage the one or more grooves of the implant to stabilize the implant with respect to the tongs and prevent rotation of the support body with respect to the longitudinal tool axis.

9. The assembly of claim 8 , wherein the superior surface and the inferior surface comprise protrusions.

10. The assembly of claim 1 , further comprising a second longitudinal opening surrounded at least in part by one or more protrusions.

11. The assembly of claim 1 , wherein the installation instrument comprises an implant stabilizer and an insert stabilizer.

12. A method for implant installation between adjacent vertebral bodies of a patient, comprising the steps of:
assembling an implant onto an insertion tool;
the implant having a support body and a rotatable insert therein;
the support body having a proximal end portion and a distal end portion and the support body being configured and dimensioned for installation between adjacent vertebral bodies;
wherein the support body includes a superior surface and an inferior surface,
wherein the support body defines a longitudinal opening extending therethrough from the superior surface to the inferior surface and positioned in between the proximal end and the distal portion to accommodate the rotatable insert therein,
wherein the insert is rotatable about a central longitudinal axis within the longitudinal opening to permit the support body to rotate about the insert and the central longitudinal axis, and
wherein the insert includes a circumferential rib that mates to a corresponding indentation shaped on the support body;
wherein the support body further includes a groove that extends adjacent the proximal end portion and extends along an interior curved wall of the support body,
moving the installation instrument to a first position wherein the insert is rotationally fixed with respect to the support body and the implant is rotationally fixed with respect to the longitudinal tool axis;
placing the implant into a patient to locate the implant between adjacent vertebral bodies of a patient;
advancing the implant between the adjacent vertebral bodies into an intervertebral space therebetween;
moving the installation instrument to a second position wherein the support body is rotatable with respect to the insert;
advancing the implant further into the intervertebral space such that the implant rotates with respect to the longitudinal tool axis.

13. The method of claim 12 , wherein the distal end of the implant is tapered and configured to separate the adjacent vertebral bodies when the installation instrument is in a first position and the implant is advanced into the intervertebral space.

14. The method of claim 12 , wherein a lock is provided on the installation instrument to prevent the instrument from disengaging from the implant during impaction.

15. The method of claim 12 , wherein the implant and insert remain implanted in the patient.

16. The method of claim 12 , wherein the insert defines a threaded hole extending transverse to the central longitudinal axis to engage with the installation instrument.

17. The method of claim 12 , wherein the superior surface and the inferior surface comprise protrusions.

Assignees

• Globus Medical Inc

Inventors

• Hansell Noah
• Niemiec Marcin
• Rhoda William S
• Meccariello Michael

Classifications

• A61F2002/30785

  parallel · CPC title

• A61F2002/30904

  serrated profile, i.e. saw-toothed · CPC title

• A61F2002/4629

  connected to the endoprosthesis or implant via a threaded connection · CPC title

• A61F2220/0033

  made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit · CPC title

• A61F2002/4627

  with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument · CPC title