Tool for intervertebral implant manipulation

• US 7,470,273 B2
• Filed: 06/25/2004
• Issued: 12/30/2008
• Est. Priority Date: 06/25/2004
• Status: Expired due to Fees

• Current Assignee: Zimmer Biomet Spine, Inc. (Zimvie Incorporated)
• Original Assignee: EBI LLC (Zimvie Incorporated)
• Inventors: Dougherty-Shah, Gretchen
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): HAMMOND, ELLEN CHRISTINA
• Application Number:
  US10/877,100
• Publication Number:
  US 20050288788A1
• Time in Patent Office: 1,649 Days
• Field of Search: 606/53, 606/86, 606/99, 606/86.R, 606/86.A, 623 1711- 1716
• US Class Current: 606/86.00A
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30112 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• 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 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2230/0004 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2250/0006 for adjusting angular orientation
• CPC Class Codes: A61F 2310/00011 Metals or alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures

Abstract

A tool for inserting or removing an intervertebral implant. The tool includes a first arm having a curved tip adapted for engaging a side wall groove of the intervertebral implant and a second arm pivotably coupled to the first arm. The first arm defines a first concave distal surface extending continuously from the curved tip and the second arm defines a second concave distal surface. The first and second concave distal surfaces define an engagement surface engageable to a substantially complementary convex end wall of the intervertebral implant.

Claims

1. A tool for inserting or removing an intervertebral implant, the tool comprising:

a first arm having a proximal end and a distal end, the distal end of the first arm defining a substantially concavely curved first arm surface;

a second arm having a proximal end and a distal end, the second arm pivotably connected to the first arm for movement between a first position for engaging an intervertebral implant and a second position for releasing the intervertebral implant, the distal end of the second arm extending beyond the distal end of the first arm, the distal end of the second arm defining a substantially concave second arm surface and a substantially convexly rounded tip directly adjacent the second arm surface, the first and second arm surfaces defining a concavely curved engagement surface substantially complementary to a convex profile of an end wall of an intervertebral implant; and

a peg extending outwardly from a central portion of the first arm surface of the distal end of the first arm, the peg substantially coaxial to the first arm, the peg receivable in an opening of the end wall of the intervertebral implant; and

wherein the rounded tip is receivable in a recess of a sidewall of the implant, the rounded tip facing the peg, such that the implant can be non-rotatably clamped between the peg and the rounded tip.

2. The tool of claim 1, wherein the curved engagement surface is non symmetric.

3. The tool of claim 1, wherein the first and second arms are biased in the second position.

4. The tool of claim 3, further comprising a lock to secure the arms in the first position.