Tool for implanting expandable intervertebral implant

• US 20090222100A1
• Filed: 02/28/2008
• Published: 09/03/2009
• Est. Priority Date: 02/28/2008
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker Spine
• Inventors: Cipoletti, Robert, Alheidt, Thomas
• Granted Patent: US 8,267,939 B2
• Time in Patent Office: Days
• US Class Current: 623/17.160
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30112 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30461 sutured, ligatured or stitched
• CPC Class Codes: A61F 2002/3052 unrestrained in only one direction, e.g. moving unidirectionally
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30565 having spring elements
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4627 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 Class Codes: A61F 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0004 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2250/0009 for adjusting thickness

Abstract

An expandable intervertebral implant and tool for use in implanting same are disclosed. The tool is useful in retaining the implant in a non-expanded state throughout insert of the implant between adjacent vertebral bodies. Among other elements, the tool includes a rod, a sleeve placed over the rod, and a locking knob attached to the rod and the sleeve to fix them with respect to each other. This construct preferably aids in preventing movement of the various components of the implant, including first and second members and first and second wedges. A method of attaching inserting the implant through the use of the tool and attaching the tool to the implant are also disclosed.

Claims

1-25. -25. (canceled)

26. An impaction instrument comprising:

a rod having a first end, a second end, and a tapered portion disposed between the first and second ends;

a sleeve having an internal channel, and at least two deformable fingers capable of outward expansion upon placement of the rod through the internal channel; and

a locking knob for fixing the rod and the sleeve with respect to each other.

34. A method of inserting a spinal implant an intervertebral disc space comprising the steps of:

providing an expandable implant for implantation between two vertebral bodies including first and second members and first and second wedges;

coupling a rod to the first wedge of the expandable implant;

placing a sleeve having deformable fingers over the rod whereby the deformable fingers contact the first and second members of the expandable implant; and

attaching a locking knob to the rod and the sleeve to fix the rod and the sleeve with respect to each other.

42. An assembly comprising:

an expandable implant for implantation between two vertebral bodies including first and second members and first and second wedges; and

an impaction instrument including;

a rod coupled with the first wedge;

a sleeve having deformable fingers, the sleeve placed over the rod; and

a locking knob attached to the rod and the sleeve thereby fixing the rod and the sleeve with respect to each other.