Spinal implants and implantation system

• US 9,814,598 B2
• Filed: 03/13/2014
• Issued: 11/14/2017
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Mis Ip Holdings LLC
• Original Assignee: Quandary Medical LLC (The Quandary Group LLC)
• Inventors: Ainsworth, Stephen D., Avidano, Eugene E., LaPierre, Leighton J.
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): Carter, Tara R
• Application Number:
  US14/210,065
• Publication Number:
  US 20140277499A1
• Time in Patent Office: 1,342 Days
• Field of Search: 606246-249, 606300-330, 623 1711- 1716
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• 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 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• 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 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30143 hexagonal
• CPC Class Codes: A61F 2002/30171 rosette- or star-shaped
• CPC Class Codes: A61F 2002/3023 wedge-shaped cylinders
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30242 spherical
• CPC Class Codes: A61F 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30309 hat-shaped or bell-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 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30545 for adjusting a diameter
• 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 2002/30593 : hollow
• CPC Class Codes: A61F 2002/30601 : telescopic
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30784 : Plurality of holes
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/30891 : Plurality of protrusions
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30995 : for sacro-iliac joints
• CPC Class Codes: A61F 2002/4415 : elements of the prosthesis being arranged in a chain like manner
• 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 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 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00161 : Carbon; Graphite
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue

Abstract

Disclosed are surgical implants for providing therapy to a treatment site, tool sets and methods for percutaneously accessing and deploying the implants within the spines. The treatment site may be a vertebral body, disc, and/or motion segments in the lumbar and sacral regions of the spine.

Claims

1. A trans-sacral spinal implant for insertion from an anterior target site on the surface of the sacrum into the sacrum, the implant comprising:

a first body having a leading end, a trailing end, a longitudinal axis through the leading and trailing ends, a length parallel to the longitudinal axis, and a sidewall surrounding the longitudinal axis and extending from the leading end to the trailing end, the first body having an interior surface and an opposite exterior surface;

an interior thread extending along the interior surface of the first body from the trailing end toward the leading end to a thread termination between the trailing end and the leading end;

an exterior thread on the exterior surface of the first body;

a second body having a leading end, a trailing end and an exterior surface extending from the leading end to the trailing end; and

the exterior surface of the second body comprising an exterior thread that engages the interior thread of the first body;

wherein the leading end of the first body includes at least one slot extending from the leading end of the first body towards the trailing end;

the at least one slot extending from the exterior surface to the interior surface, the leading end forming a substantially flat distal surface that is substantially perpendicular to the exterior surface of the first body;

wherein threading the second body into the interior surface of the first body causes the leading end of the first body to radially expand and for the threaded leading end of the second body to extend past the leading end of the first body.

2. The spinal implant of claim 1,

wherein the leading end of the first body includes at least one slot extending from the leading end of the first body towards the trailing end,

the at least one slot extending from the exterior surface to the interior surface,

wherein threading the second body into the interior surface of the first body causes the leading end of the first body to radially expand.

3. The spinal implant of claim 1,

wherein the first body comprises a plurality of distal petals.

4. The spinal implant of claim 1,

wherein the first body comprises a plurality of distal petals, and the threading of the second body into the interior surface of the first body causes said distal petals to radially expand, providing increased surface area of substantially planar form, substantially perpendicular to said longitudinal axis of said first body;

and

said first body having a major thread diameter range of between 13 mm and 15.5 mm and a length of between 20 mm and 40 mm.

5. The spinal implant of claim 4,

wherein a petal has length ranging between 15 mm and 20 mm.

6. The spinal implant of claim 1,

wherein at least one of the group consisting of the first body and the second body comprises PEEK.

7. The spinal implant of claim 1,

wherein the second body comprises metal.

8. The spinal implant of claim 1,

wherein the first body comprises PEEK and the second body comprises metal.

9. The spinal implant of claim 1,

wherein said exterior thread on the exterior surface of the first body comprises cancellous type bone threads.

10. The spinal implant of claim 1,

wherein the exterior thread of the second body extends from the trailing end of the second body toward the leading end of the second body to a thread termination between the trailing end and the leading end of the second body.

11. The spinal implant of claim 10,

wherein the interior surface of the first body further comprises a tapered form reducing toward the leading end of the first body from the thread termination.

12. The spinal implant of claim 10,

wherein said second body further comprises a tapered form extending from the thread termination of the exterior thread of the second body to the leading end of the second body.

13. The spinal implant of claim 1,

wherein the second body further comprises a lumen extending from the trailing end of the second body toward the leading end of the second body;

the lumen further comprising a key for the engagement of a rotatable driver tool.