Pedicle-based intradiscal fixation devices and methods

Patent metadata

Field	Value
Publication number	US-11877934-B2
Application number	US-202016842285-A
Country	US
Kind code	B2
Filing date	Apr 7, 2020
Priority date	Apr 7, 2020
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

Pedicle-based intradiscal fixation devices, systems, instruments, and methods thereof. An implant for stabilizing an inferior vertebra and a superior vertebra may include a first member and a second member moveably connected to the first member. The implant may have a first, initial insertion orientation and a second, final implantation orientation different from the first, initial insertion orientation. The first member may be configured to be inserted through a pedicle of the inferior vertebra and the second member may be configured to engage bone of the superior vertebra in the second, final implantation orientation.

First claim

What is claimed is:

1. An implant for stabilizing an inferior vertebra and a superior vertebra, the implant comprising:
a pedicle screw and an anchor moveably connected to the pedicle screw, the implant having a first, initial insertion orientation and a second, final implantation orientation different from the first, initial insertion orientation,
wherein the pedicle screw is configured to be inserted through a pedicle of the inferior vertebra and the anchor is configured to engage a non-pedicular bone portion of the superior vertebra in the second, final implantation orientation,
wherein, in the initial orientation, the anchor is positioned adjacent to the pedicle screw and wherein the anchor is translated away from the pedicle screw to a final extended position in the final implantation orientation,
wherein the anchor is moveably connected to the pedicle screw via a housing, and
wherein a distal end of the anchor is received in the housing in the first, initial orientation, and the anchor slides through the housing and the proximal end of the anchor is received in the housing in the second, final implantation orientation.

2. The implant of claim 1 , wherein the housing has an alignment feature and wherein the housing is coupled to the pedicle screw.

3. The implant of claim 2 , wherein the anchor includes a body portion having a proximal end and a distal end, wherein the distal end includes an engagement portion configured to engage bone and wherein the body portion includes at least one alignment feature for engaging with the alignment feature of the housing to allow for movement of the anchor with respect to the housing.

4. A method for stabilizing an inferior vertebra and a superior vertebra, the method comprising:
posteriorly accessing a spine of a patient;
inserting an implant having a pedicle screw and an anchor into a pedicle of the inferior vertebra in a first, initial orientation, wherein in the first, initial orientation, a longitudinal axis of the pedicle screw and a longitudinal axis of the anchor are parallel;
inserting the pedicle screw of the implant into a vertebral body of the inferior vertebra; and
modifying the implant into a second, final implantation orientation and inserting the anchor of the implant into a vertebral body of the superior vertebra, wherein the implant traverses a disc or disc space between the inferior and superior vertebrae, and the second, final implantation orientation thereby fixates the inferior and superior vertebrae,
wherein, in the initial orientation, the anchor is positioned adjacent to the pedicle screw and wherein the anchor is translates away from the pedicle screw to a final extended position in the final implantation orientation,
wherein the anchor is moveably connected to the pedicle screw via a housing, and
wherein a distal end of the anchor is received in the housing in the first, initial orientation, and the anchor slides through the housing and the proximal end of the anchor is received in the housing in the second, final implantation orientation.

5. The method of claim 4 , wherein the first, initial orientation is a collapsed position and the second, final implantation orientation is an extended position of the anchor.

6. An implant for stabilizing an inferior vertebra and a superior vertebra, the implant comprising:
a pedicle screw, a housing affixed to the pedicle screw, and an anchor moveably connected to the housing, wherein the implant has a collapsed position whereby the anchor is positioned close to the pedicle screw, and the implant has an extended position whereby the anchor is moved away from the pedicle screw, wherein the anchor moves from the collapsed position to the extended position via translation along an arcuate path,
wherein the pedicle screw is configured to be inserted through a pedicle of the inferior vertebra in the collapsed position, and the anchor is configured to engage a non-pedicular bone portion of the superior vertebra in the extended position, and
wherein a distal end of the anchor is received in the housing in the first, initial orientation, and the anchor slides through the housing and the proximal end of the anchor is received in the housing in the second, final implantation orientation.

7. The implant of claim 6 , wherein the pedicle screw has a proximal end including a recess configured to receive an instrument for inserting the pedicle screw, and the pedicle screw has a distal end configured to be inserted into the pedicle of the inferior vertebra.

8. The implant of claim 7 , wherein the pedicle screw has one or more threads configured to engage bone.

9. The implant of claim 6 , wherein the housing includes a first portion configured to receive the pedicle screw and a second portion configured to retain the anchor therein, wherein the anchor is configured to move, pivot, or articulate relative to the pedicle screw.

10. The implant of claim 6 , wherein the anchor is curved between the proximal and distal ends.

11. The implant of claim 6 , wherein the anchor is generally positioned perpendicular to the pedicle screw in the extended position.

12. The implant of claim 6 , wherein the anchor includes corresponding one or more tracks within the second portion configured to engage corresponding tracks within the second portion of the housing, and thereby allow for movement of the anchor between the collapsed and extended positions.

Assignees

• Globus Medical Inc

Inventors

• Glerum Chad
• Weiman Mark
• Hessler Tyler
• Hill Albert
• Sullivan Myles

Classifications

• A61F2/446 Primary

  having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones · CPC title

• A61B17/7032

  Screws or hooks with U-shaped head or back through which longitudinal rods pass · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61F2002/30131

  horseshoe- or crescent- or C-shaped or U-shaped · CPC title

• A61F2002/30405

  made by screwing complementary threads machined on the parts themselves · CPC title