System and method for multiple level facet joint arthroplasty and fusion

Patent metadata

Field	Value
Publication number	US-2016346015-A1
Application number	US-201615236962-A
Country	US
Kind code	A1
Filing date	Aug 15, 2016
Priority date	Jun 2, 2004
Publication date	Dec 1, 2016
Grant date	—

Abstract

Facet joint replacement implants may be designed for use on multiple adjacent vertebral levels. Each superior implant may have a substantially semispherical concave surface, and each inferior implant may have a cooperating semispherical convex surface that is deformable to enable it to be pressed into the superior implant concave surface to fix the relative orientations of the superior and inferior implants. Thus, the inferior implant may be attached to the same pedicle as the superior implant, but may also be oriented independently of the superior implant and then fixed in position. Similar mounting structures may be used to attach one or more fusion implants to a level adjacent to that of a facet joint replacement implant.

First claim

What is claimed is:

1 . An implantable system comprising:
a frame configured to extend across a midline of a spine to assist in the implantation of one or more fusion assemblies or prosthetic assemblies; a fusion assembly comprising a first yoke assembly and a first pedicle screw, wherein the yoke assembly is capable of polyaxial movement relative to the first pedicle screw, wherein the pedicle screw includes a head portion and a shaft portion extending therefrom for inserting into a bone member, the fusion assembly further comprising a rod that extends through the yoke assembly and a second yoke assembly operably connected to the rod, and a prosthetic assembly comprising a second pedicle screw and a receiving surface attached to the second pedicle screw, wherein the prosthetic assembly is capable of articular movement.

2 . The system of claim 1 , wherein the fusion assembly comprises a semispherical engagement surface.

3 . The system of claim 2 , wherein the semispherical engagement surface of the fusion assembly is nested in the receiving surface of the prosthetic assembly.

4 . The system of claim 3 , further comprising a locking assembly received on the second pedicle screw above the semispherical engagement surface and the receiving surface.

5 . The system of claim 4 , wherein the locking assembly comprises a rotational locking member and a translational locking member.

6 . The system of claim 1 , wherein the receiving surface of the prosthetic assembly is attached to a first articulation surface configured to articulate with a second articulation surface of an adjacent prosthetic assembly.

7 . The system of claim 1 , wherein the prosthetic assembly comprises a facet joint assembly.

8 . The system of claim 1 , wherein the fusion assembly further comprises a nut designed to tighten the rod therein.

9 . The system of claim 1 , wherein the receiving surface of the prosthetic assembly comprises a concave, semispherical shape.

10 . An implantable system comprising:
a frame configured to extend across a midline of a spine to assist in the implantation of one or more fusion assemblies or prosthetic assemblies; a fusion assembly comprising a first yoke assembly and a second yoke assembly connected via a rod, wherein the second yoke assembly includes an engagement surface attached thereto, and a prosthetic assembly comprising a receiving surface, wherein the prosthetic assembly is capable of articular movement.

11 . The system of claim 10 , wherein the fusion assembly extends across a first vertebral level and the prosthetic assembly extends across a second vertebral level.

12 . The system of claim 10 , wherein the receiving surface of the prosthetic assembly extends around a pedicle screw.

13 . The system of claim 12 , wherein the prosthetic assembly further comprises an articulation surface attached to the receiving surface.

14 . The system of claim 13 , wherein the prosthetic assembly further comprises a bone apposition surface.

15 . The system of claim 14 , wherein the prosthetic assembly further comprises a split sphere received in the receiving surface.

16 . The system of claim 15 , wherein the prosthetic assembly further comprises a locking member.

17 . An implantable system comprising:
a frame configured to extend across a midline of a spine to assist in the implantation of one or more fusion assemblies or prosthetic assemblies; a first fusion assembly comprising a first yoke assembly and a first pedicle screw, wherein the first fusion assembly extends across a first vertebral level, a prosthetic assembly capable of articular movement, wherein the prosthetic assembly extends across a second vertebral level, and a second fusion assembly comprising a second yoke assembly a second pedicle screw, wherein the second fusion assembly extends across a third vertebral level.

18 . The system of claim 17 , wherein at least a portion of the first fusion assembly nests within the prosthetic assembly.

19 . The system of claim 17 , wherein the first fusion assembly and the second fusion assembly provide fixation, while the prosthetic assembly provides movement.

20 . The system of claim 18 , wherein the prosthetic assembly comprises a facet joint assembly.

Assignees

• Globus Medical Inc

Inventors

• Triplett Daniel J
• Chervitz Alan

Classifications

• A61B17/704

  the longitudinal element passing through a ball-joint in the screw head · CPC title

• A61B17/7032

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

• A61F2220/0025

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

• A61F2002/448

  comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants · CPC title

• A61F2002/30649

  Ball-and-socket joints · CPC title