Instrumentation and procedure for implanting spinal implant devices

• US 7,637,952 B2
• Filed: 03/11/2003
• Issued: 12/29/2009
• Est. Priority Date: 03/11/2002
• Status: Expired due to Term

• Current Assignee: Zimmer Biomet Spine, Inc. (Zimvie Incorporated)
• Original Assignee: Zimmer Spine, Inc. (Zimmer Biomet Holdings, Inc.)
• Inventors: Landry, Michael E., Wagner, Erik J., Hochschuler, Stephen H., Todd, Ronald C.
• Primary Examiner(s): Philogene; Pedro
• Application Number:
  US10/387,329
• Publication Number:
  US 20030233145A1
• Time in Patent Office: 2,485 Days
• Field of Search: 606/90, 606/99, 606/61, 606/205, 606/105, 606/206, 606/102, 606/72, 606/85, 606/100, 606/86, 623/17.11, 623/17.16
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 Trial or dummy 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 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30385 the rib and groove having non-parallel, e.g. conically-tapered, cooperating sides, e.g. having a trapezoidal front cross-section
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30471 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30565 having spring elements
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3071 : Identification means; Administration of patients
• CPC Class Codes: A61F 2002/30784 : Plurality of holes
• CPC Class Codes: A61F 2002/30823 : having the shape of a reverse dovetail
• CPC Class Codes: A61F 2002/30845 : with cutting edges
• CPC Class Codes: A61F 2002/30922 : Hardened surfaces
• CPC Class Codes: A61F 2002/30925 : etched
• 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 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2002/4629 : connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2002/4687 : Mechanical guides for implantation instruments
• CPC Class Codes: A61F 2210/0004 : bioabsorbable
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0091 : connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0082 : parallelepipedal
• CPC Class Codes: A61F 2250/0087 : colour-coded
• CPC Class Codes: A61F 2250/0089 : coded with symbols, e.g. dots, numbers, letters, words
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF

Abstract

An instrumentation set may include insertion instruments for forming an implant between bone structures. The insertion instruments may include a spreader and a separator. The bone structures may be vertebrae. Implant members may be attached to the spreader and positioned between the bone structures. The separator may be inserted into the spreader to establish a desired separation distance between the implant members. Connectors may be inserted into the implant members to join the implant members together and form the implant. The insertion instruments may be removed. A seater may be used to set the position of the connectors relative to the implant members to inhibit disassembly of the implant.

Claims

1. An implant and instrument for surgical use, comprising:

a modular implant, said modular implant comprising a first plate, a second plate, and a connector configured to connect the first plate to the second plate; and

an instrument for implanting the modular implant to a disc space, said instrument comprising a spreader and a separator,

wherein the spreader comprises a body with an opening, a first member holder extending from the opening, and a second member holder extending from the opening,

wherein the first member holder of the spreader comprises a distal end and a proximal end, said distal end of said first member holder having a first sloped surface,

wherein the second member holder of the spreader comprises a distal end and a proximal end, said distal end of said second member holder having a second sloped surface,

wherein the separator comprises a distal end and a proximal end, said distal end of the separator comprising an arm,

wherein the separator is insertable within the opening of the body for slidable translation between the first member holder and the second member holder,

wherein the arm is configured to releasably engage the connector, and

wherein when the first plate is slidably engaged to the first member holder and when the second plate is slidably engaged to the second member holder, the separator slidably translates in the opening of the spreader to deliver the connector to connect the first plate to the second plate.

2. The implant and instrument of claim 1, wherein the implant comprises two connectors, and wherein the distal end of the separator comprises two arms for holding the two connectors.

3. The implant and instrument of claim 1, wherein the connector establishes a separation distance between the first plate and the second plate.

4. The implant and instrument of claim 2, wherein the two connectors that couple to the first plate and the second plate form a modular spinal implant.

5. The implant and instrument of claim 4, wherein the modular implant has a height range from about 8 mm to about 24 mm.

6. The implant and instrument of claim 1, wherein the distal end of the first member holder comprises a slot, said slot causing the distal end of the first member holder to apply a force to the first plate to hold the first plate onto the first member holder.

7. The implant and instrument of claim 1, wherein the distal end of the first member holder comprises a stop, said stop limits insertion of the first plate onto the first member holder.

8. The implant and instrument of claim 1, wherein the first member holder comprises a compression member, said compression member configured to apply a force against a recess in the first plate to frictionally couple the implant member to the holder.

9. The implant and instrument of claim 1, wherein the spreader comprises a depth indicator to indicate an insertion depth into the disc space of the first plate and the second plate.

10. The implant and instrument of claim 1, wherein the first member holder and the second member holder are angled such that there is substantially no separation distance between ends of the holders coupled to the first plate and the second plate when the spreader is in an initial position.

11. The implant and instrument of claim 1, wherein the opening comprises a ledge to limit an insertion depth of the separator into the spreader.

12. The implant and instrument of claim 1, wherein the connector comprises an X-shaped body.

13. The implant and instrument of claim 1, wherein the connector comprises a limiter, said limiter configured to limit the compression of connector a predetermined amount.

14. The implant and instrument of claim 12, wherein the connector comprises a limiter positioned within the X-shaped body, said limiter configured to limit the compression of connector a predetermined amount.

15. The implant and instrument of claim 1, wherein the separator comprises a groove, said groove configured to guide the separator between the implant members coupled to the holders of the spreader.

16. The implant and instrument of claim 1, wherein the arm of the separator is configured to allow insertion of the connector in only one direction.

17. An implant and instrument for surgical use, comprising:

a modular implant, said modular implant comprising a first plate, a second plate, and two connectors configured to connect the first plate to the second plate; and

an instrument for implanting the modular implant to a disc space, said instrument comprising a spreader and a separator;

wherein the spreader comprises a body with an opening, a first member holder extending from the opening, and a second member holder extending from the opening,

wherein the first member holder of the spreader comprises a distal end and a proximal end, said distal end of said first member holder having a first sloped surface,

wherein the second member holder of the spreader comprises a distal end and a proximal end, said distal end of said second member holder having a second sloped surface,

wherein the separator comprises a distal end and a proximal end, said distal end of the separator comprising two arms,

wherein the separator is insertable within the opening of the body for slidable translation between the first member holder and the second member holder,

wherein the two arms are configured to releasably engage the two connectors, and

wherein when the first plate is slidably engaged to the first member holder and when the second plate is slidably engaged to the second member holder, the separator slidably translates in the opening of the spreader to deliver the two connectors to connect the first plate to the second plate.