Spinal stabilization surgical apparatus

• US 5,720,748 A
• Filed: 06/07/1995
• Issued: 02/24/1998
• Est. Priority Date: 02/10/1993
• Status: Expired due to Term

• Current Assignee: Zimmer Spine, Inc. (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Spine-Tech, Inc. (Sulzer Medica)
• Inventors: Kohrs, Douglas W., Kuslich, Stephen D.
• Primary Examiner(s): Willse, David H.
• Application Number:
  US08/482,025
• Time in Patent Office: 993 Days
• Field of Search: 606/80, 606/96, 606/61, 623/17
• US Class Current: 606/80
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/30723 Plugs or restrictors for sealing a cement-receiving space tools for inserting plugs A61F2/4614; sealing collars for use during cementing A61B17/8808
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• 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 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• 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 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30672 temporary
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3085 with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30861 having threads of increasing or decreasing height
• CPC Class Codes: A61F 2002/30868 Square, rectangular or rhomboidal threads
• CPC Class Codes: A61F 2002/448 : comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0069 : cylindrical

Abstract

An apparatus for performing spinal stabilization includes a distraction spacer sized to be inserted into a disc space and act against end plates of vertebra to urge the vertebra apart. A tube guide is placed at a second location on the disc space with the tube guide including a spacer on its distal end sized approximate to a sizing of the distraction spacer. A guide tube is mutually sized with the tube guide for the tube guide and the spacer to be withdrawn through the guide tube. The guide tube is sized to direct surgical tools to the disc space. A boring tool includes a guide tip which is sized to be received within the disc space and act against end plates of the vertebra to maintain the boring tool in accurate alignment with the disc space.

Claims

1. A surgical kit for implanting a spinal fusion implant into a disk space of disk material separating a first and second vertebrae, said disk space and first and second vertebrae divisible into first and second sides separated by a sagittal plane, said kit comprising:

a distraction plug sized smaller than said implant and further sized to be inserted between said vertebrae on at least one of said sides and with said distraction plug further sized for external surfaces of said distraction plug to urge against end-plates of said vertebrae to urge said vertebrae apart by a distraction equal to an external sizing of said plug;

a guide pin sized approximate to said sizing of said plug;

a drill tube guide attached to said guide pin on a distal end of said drill tube guide with said drill tube guide having predetermined external dimensions;

a drill tube sized to be received upon said drill tube guide with said drill tube guide within said drill tube and with external surfaces of said drill tube guide in close tolerance with internal surfaces of said drill tube and with means on a distal end of said drill tube for fastening said drill tube to said vertebrae; and

a boring tool having a proximal end with means for boring into said vertebrae and with said boring tool sized to be received within said drill tube with said drill tube acting against external surfaces of said boring tool to guide said boring tool.

2. A kit according to claim 1 comprising a drill tube planer having means on a distal end thereof for rasping said vertebrae with said drill tube planer hollow and sized to be received upon said drill tube guide in close tolerance.

3. A kit according to claim 1 further comprising an implant driver having means on a distal end thereof for releasably engaging an implant and turning said implant upon turning of said driver, said driver sized to be slidably received within said drill tube.

4. A kit according to claim 3 wherein each of said implant driver and drill tube includes cooperating stop surfaces to limit advancement of said implant driver toward said disk space.

5. A kit according to claim 1 wherein said boring tool includes means on a distal end thereof for boring into said vertebrae upon turning of said boring tool and further having means on said distal end for releasably receiving said guide pin;

said boring tool sized to be received within said drill tube.

6. A kit according to claim 1 wherein each of said boring tool and drill tube includes cooperating stop surfaces to limit a depth of penetration of said boring tool into said disk space.