Spinal implant and instruments

• US 8,758,344 B2
• Filed: 08/28/2012
• Issued: 06/24/2014
• Est. Priority Date: 06/13/1988
• Status: Expired due to Fees

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Michelson, Gary Karlin
• Primary Examiner(s): Brown, Michael A.
• Application Number:
  US13/596,756
• Publication Number:
  US 20120323331A1
• Time in Patent Office: 665 Days
• Field of Search: 606 60- 61, 606246-250
• US Class Current: 606/60
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/0642 for bones, e.g. for osteosynthesis or connecting tendon to bone
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/17 Guides or aligning means for drills , mills, pins or wires
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/7059 Cortical plates A61B17/7007, A61B17/7058 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 17/8665 Nuts
• CPC Class Codes: A61B 17/8875 Screwdrivers, spanners or wrenches
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2017/0641 having at least three legs as part of one single body
• CPC Class Codes: A61B 2017/0647 having one single leg, e.g. tacks
• CPC Class Codes: A61B 2017/0648 threaded, e.g. tacks with a screw thread
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element
• CPC Class Codes: A61B 2090/036 : abutting on tissue or skin
• CPC Class Codes: A61F 2/30744 : End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/30767 : Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30965 : Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• 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 2/4603 : for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 : of spinal prostheses
• CPC Class Codes: A61F 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 2002/30143 : hexagonal
• CPC Class Codes: A61F 2002/30224 : cylindrical
• CPC Class Codes: A61F 2002/30235 : tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30329 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/30405 : made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30426 : Bayonet coupling
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• 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 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30797 : internally-threaded
• CPC Class Codes: A61F 2002/30836 : knurled
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• 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 2002/449 : comprising multiple spinal implants located in different intervertebral spaces or in different vertebrae
• CPC Class Codes: A61F 2002/4619 : for extraction
• 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 2002/4649 : Bone graft or bone dowel harvest sites
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering
• 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 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0069 : cylindrical
• 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 2310/00059 : Chromium or Cr-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

A kit including an artificial implant for insertion between two adjacent vertebrae along a coronal plane.

Claims

1. A kit for performing surgery through an incision in skin of a patient'"'"'s body for accessing a disc space between two adjacent vertebrae located within a portion of one of a human thoracic or lumbar spine, the portion of one of the human thoracic or lumbar spine defined by the two adjacent vertebrae having an anterior aspect and a posterior aspect being divided by a first plane through transverse processes of the two adjacent vertebrae, the disc space having a depth measured from an anterior aspect to a posterior aspect of the disc space, each of the two adjacent vertebrae having a vertebral body having a transverse width perpendicular to the depth of the disc space, the incision being proximate an intersection of the skin and a path having an axis lying in a coronal plane passing through a lateral aspect and a medial aspect of the two adjacent vertebrae and anterior to the transverse processes, the kit comprising:

a first surgical instrument having a length for insertion into the body of the patient through the incision until proximate the disc space along the path and anterior to the transverse processes;

a second surgical instrument for insertion into the body of the patient through the incision and over at least a portion of the length of said first surgical instrument, said second surgical instrument having a distal end and an opposite proximal end and a length therebetween, said second surgical instrument having a passageway configured to receive a portion of the length of said first surgical instrument therein;

a third surgical instrument for insertion into the body of the patient through the incision and over at least a portion of the length of said second surgical instrument, said third surgical instrument having a distal end for insertion over said second surgical instrument and an opposite proximal end;

a single elongated portion removably attachable to said distal end of said third surgical instrument, said single elongated portion having a length, a thickness, and a width, the length of said single elongated portion being greater than the width and the thickness of said single elongated portion, the width of said single elongated portion being greater than the thickness of said single elongated portion, said single elongated portion being tapered to facilitate entry between the vertebral bodies of the two adjacent vertebrae; and

an interbody intraspinal implant for insertion through said third surgical instrument into a laterally facing opening in said portion of one of the human thoracic or lumbar spine, said implant having an insertion end for insertion first into the laterally facing opening and a trailing end and a length therebetween, the length of said implant being sized to occupy substantially the full transverse width of the vertebral bodies of the two adjacent vertebrae, the length of said implant being greater than the depth of the disc space, said implant having opposed surfaces oriented toward each of the vertebral bodies of the two adjacent vertebrae when inserted therebetween, said opposed surfaces having bone engaging projections configured to engage the vertebral bodies of the two adjacent vertebrae, said implant having a maximum height between said bone engaging projections of said opposed surfaces and perpendicular to the length of said implant, the length of said implant being greater than the maximum height of said implant.

2. The kit of claim 1, further comprising a spinal fixation device for engagement to the adjacent vertebrae after said implant has been inserted into the laterally facing opening.

3. The kit of claim 2, wherein said spinal fixation device has a plate configured to cover at least a portion of said trailing end of said implant.

4. The kit of claim 1, further comprising a plate for engagement with the adjacent vertebrae to prevent unwanted excursion of said implant from the spine.

5. The kit of claim 4, wherein said plate includes a portion for attachment with a fastener to each of the adjacent vertebrae.

6. The kit of claim 4, further comprising a screw for engagement with said plate after said implant has been inserted into the laterally facing opening.

7. The kit of claim 1, further comprising a spinal fixation device for coupling to said implant and engagement with the adjacent vertebrae.

8. The kit of claim 1, in combination with fusion promoting substances.

9. A kit for performing surgery through an incision in skin of a patient'"'"'s body for accessing a disc space between two adjacent vertebrae located within a portion of one of a human thoracic or lumbar spine, the portion of one of the human thoracic or lumbar spine defined by the two adjacent vertebrae having an anterior aspect and a posterior aspect being divided by a first plane through transverse processes of the two adjacent vertebrae, the disc space having a depth measured from an anterior aspect to a posterior aspect of the disc space, each of the two adjacent vertebrae having a vertebral body having a transverse width perpendicular to the depth of the disc space, the incision being proximate an intersection of the skin and a path having an axis lying in a coronal plane passing through a lateral aspect and a medial aspect of the two adjacent vertebrae and anterior to the transverse processes, the kit comprising:

a first surgical instrument having a length for insertion into the body of the patient through the incision until proximate the disc space along the path and anterior to the transverse processes;

a second surgical instrument for insertion into the body of the patient through the incision and over at least a portion of the length of said first surgical instrument, said second surgical instrument having a distal end and an opposite proximal end and a length therebetween, said second surgical instrument having a passageway configured to receive a portion of the length of said first surgical instrument therein;

a third surgical instrument for insertion into the body of the patient through the incision and over at least a portion of the length of said second surgical instrument, said third surgical instrument having a distal end for insertion over said second surgical instrument and an opposite proximal end, said third surgical instrument having at least two elongated portions for insertion into the patient, each of said elongated portions having a length, a width, and a thickness, said length of each of said at least two elongated portions being greater than the width and the thickness of said at least two elongated portions, each of said at least two elongated portions have a cross section through the width and the thickness and perpendicular to the length of said at least two elongated portions, respectively, each cross section of said at least two elongated portions having a convex exterior surface, said convex surfaces of each of said at least two elongated portions having the same curvature; and

an interbody intraspinal implant for insertion through said third surgical instrument into a laterally facing opening in said portion of one of the human thoracic or lumbar spine, said implant having an insertion end for insertion first into the laterally facing opening and a trailing end and a length therebetween, the length of said implant being sized to occupy substantially the full transverse width of the vertebral bodies of the two adjacent vertebrae, the length of said implant being greater than the depth of the disc space, said implant having opposed surfaces oriented toward each of the vertebral bodies of the two adjacent vertebrae when inserted therebetween, said opposed surfaces having bone engaging projections configured to engage the vertebral bodies of the two adjacent vertebrae, said implant having a maximum height between said bone engaging projections of said opposed surfaces and perpendicular to the length of said implant, the length of said implant being greater than the maximum height of said implant.

10. The kit of claim 9, further comprising a spinal fixation device for engagement to the adjacent vertebrae after said implant has been inserted into the laterally facing opening.

11. The kit of claim 10, wherein said spinal fixation device has a plate configured to cover at least a portion of said trailing end of said implant.

12. The kit of claim 9, further comprising a plate for engagement with the adjacent vertebrae to prevent unwanted excursion of said implant from the spine.

13. The kit of claim 12, wherein said plate includes a portion for attachment with a fastener to each of the adjacent vertebrae.

14. The kit of claim 12, further comprising a screw for engagement with said plate after said implant has been inserted into the laterally facing opening.

15. The kit of claim 9, in combination with fusion promoting substances.

16. A kit for performing surgery through an incision in skin of a patient'"'"'s body for accessing a disc space between two adjacent vertebrae located within a portion of one of a human thoracic or lumbar spine, the portion of one of the human thoracic or lumbar spine defined by the two adjacent vertebrae having an anterior aspect and a posterior aspect being divided by a first plane through transverse processes of the two adjacent vertebrae the disc space having a depth measured from an anterior aspect to a posterior aspect of the disc space, each of the two adjacent vertebrae having a vertebral body having a transverse width perpendicular to the depth of the disc space, the incision being proximate an intersection of the skin and a path having an axis lying in a coronal plane passing through a lateral aspect and a medial aspect of the two adjacent vertebrae and anterior to the transverse processes, the kit comprising:

a first surgical instrument having a length for insertion into the body of the patient through the incision and along the path and anterior to the transverse processes;

a second surgical instrument for insertion into the body of the patient through the incision and over at least a portion of said length of said first surgical instrument, said second surgical instrument having a distal end and an opposite proximal end and a length there between, said second surgical instrument having a passageway configured to receive a portion of said length of said first surgical instrument therein;

a third surgical instrument for insertion into the body of the patient through the incision and over at least a portion of the length of said second surgical instrument, said third surgical instrument having a distal end for insertion over said second surgical instrument and an opposite proximal end, said third surgical instrument having a first, a second, and a third elongated portion for insertion into the patient, each of said elongated portions having a length, a width, and a thickness, the length of said first elongated portion being greater than the width and the thickness of said first elongated portion, the width of said first elongated portion being greater than the thickness of said first elongated portion, the width of said first elongated portion proximate said distal end of said third surgical instrument having a midpoint, the length of said second elongated portion being greater than the width and the thickness of said second elongated portion, the length of said third elongated portion being greater than the width and the thickness of said third elongated portion, each of said first, second, and third elongated portions having a cross section through the width and the thickness and perpendicular to the length thereof, each cross section of said first, second, and third elongated portions having a convex exterior surface, said convex exterior surfaces of each of said second and third elongated portions having the same curvature; and

an interbody intraspinal implant for insertion through said third surgical instrument into a laterally facing opening in said portion of one of the human thoracic or lumbar spine, said implant having an insertion end for insertion first into the laterally facing opening and a trailing end and a length therebetween, the length of said implant being sized to occupy the full transverse width of the vertebral bodies of the two adjacent vertebrae, the length of said implant being greater than the depth of the disc space, said implant having opposed surfaces oriented toward each of the vertebral bodies of the two adjacent vertebrae when inserted therebetween, said opposed surfaces having bone engaging projections configured to engage the vertebral bodies of the two adjacent vertebrae, said implant having a maximum height between said bone engaging projections of said opposed surfaces and perpendicular to the length of said implant, the length of said implant being greater than the maximum height of said implant.

17. The kit of claim 16, further comprising a spinal fixation device for engagement to the adjacent vertebrae after said implant has been inserted into the laterally facing opening.

18. The kit of claim 17, wherein said spinal fixation device has a plate configured to cover at least a portion of said trailing end of said implant.

19. The kit of claim 16, further comprising a plate for engagement with the adjacent vertebrae to prevent unwanted excursion of said implant from the spine.

20. The kit of claim 19, wherein said plate includes a portion for attachment with a fastener to each of the adjacent vertebrae.