FACET JOINT IMPLANTS AND DELIVERY TOOLS

• US 20130110168A1
• Filed: 12/20/2012
• Published: 05/02/2013
• Est. Priority Date: 06/06/2008
• Status: Abandoned Application

• Current Assignee: Providence Medical Technology, Inc.
• Original Assignee: Providence Medical Technology, Inc.
• Inventors: McCormack, Bruce M., Smith, Jeffrey D.
• Application Number:
  US13/722,567
• Publication Number:
  US 20130110168A1
• Time in Patent Office: Days
• US Class Current: 606/246
• 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 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/7064 Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
• CPC Class Codes: A61B 17/7074 Tools specially adapted for spinal fixation operations other than for bone removal or filler handling A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39
• CPC Class Codes: A61B 17/863 with thread interrupted or changing its form along shank, other than constant taper
• CPC Class Codes: A61B 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• CPC Class Codes: A61B 17/8819 characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula A61B17/8825 takes precedence
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 2017/00424 ergonomic, e.g. fitting in fist
• CPC Class Codes: A61B 2017/00429 with a roughened portion
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2017/320028 with reciprocating movements
• CPC Class Codes: A61B 2090/031 torque limiting
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter
• CPC Class Codes: A61F 2/4405 : for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes devices implanted between spinous or transverse processes A61B17/7062
• 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 2/447 : substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 : of spinal prostheses
• CPC Class Codes: A61F 2002/30131 : horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30168 : L-shaped
• CPC Class Codes: A61F 2002/30176 : V-shaped
• CPC Class Codes: A61F 2002/30266 : wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30289 : helically-coiled
• CPC Class Codes: A61F 2002/30378 : Spherically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30405 : made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30451 : soldered or brazed or welded
• 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 2002/30484 : Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part
• CPC Class Codes: A61F 2002/30507 : using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/3052 : unrestrained in only one direction, e.g. moving unidirectionally
• CPC Class Codes: A61F 2002/30523 : by means of meshing gear teeth
• CPC Class Codes: A61F 2002/30538 : for adjusting angular orientation
• CPC Class Codes: A61F 2002/30556 : for adjusting thickness
• CPC Class Codes: A61F 2002/30599 : stackable
• CPC Class Codes: A61F 2002/30733 : Inserts placed into an endoprosthetic cavity, e.g. for modifying a material property
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• 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 2002/4627 : 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: H04L 45/00 : Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/02 : Topology update or discovery
• CPC Class Codes: H04L 45/22 : Alternate routing
• CPC Class Codes: H04L 45/28 : using route fault recovery
• CPC Class Codes: H04W 28/04 : Error control

Abstract

A spinal joint distraction system is disclosed and may include a delivery device, a driver assembly, and an internal actuator, where the driver assembly is adapted to be hold an implant and be sleevably inserted into the delivery device and the internal actuator is adapted to advance an implant distractor to distract the implant, the system also including an implant, a chisel, an injector, a gripping tool, and a dilator set. Several embodiments of an implant are disclosed as well a method of placing an implant.

Claims

1. A spinal implant comprising:

an first member and a second member each comprising a distal end, the distal end of the first member coupled to the distal end of the second member via an interlocking scissor feature positioned near the distal end of each member, the first member further comprising an inner surface, an outer surface and a threaded slot passing through the first member from the inner surface to the outer surface; and

an implant distractor comprising a thread feature, the implant distractor adapted to be advanced between the first and second members and separate the first and second members such that the upper and lower members hinge relative to one another about the interlocking scissor feature,

wherein the threaded slot is adapted to receive the thread feature, the threaded slot comprises a truncated threaded slot and the implant distractor comprises a cross-cut thread, and the cross-cut thread being engaged with the truncated threaded slot helps to resist the implant distractor from backing out from between the first and second members.

2. The implant of claim 1, wherein at least one of the first member or the second member comprises at least one lateral edge and a plurality of teeth spaced along the at least one lateral edge.

3. The implant of claim 1, wherein a proximal end of at least one of the first member or second member comprises a guide feature for receiving and guiding the implant distractor between the first and second members when the implant distractor is initially beginning to be advanced between the first and second members.

4. The implant of claim 1, further comprising a weld extending on at least a portion of the interlocking scissor feature.

5. The implant of claim 1, wherein the implant distractor is advanced between the first and second members via a threading action between the threaded feature and threaded slot.

6. The implant of claim 1, wherein the thread feature is received by the threaded slot such that at least a portion of the thread feature projects through the threaded slot and outwardly past the outer surface of the first member.

7. A spinal implant comprising:

a first member and a second member each comprising;

a distal end, a proximal end generally opposite the distal end;

an inner surface; and

an outer surface;

the first member further comprising a threaded slot arrangement passing through the first member from the inner surface of the first member to the outer surface of the first member, the threaded slot arrangement comprising a truncated slot passing through the first member from the inner surface of the first member to the outer surface of the first member, the first member and second member being coupled together via an interlocking scissor feature positioned near the distal ends of the first and second members; and

an implant distractor comprising;

a longitudinal body tapering to a distal termination; and

a coil shaped thread feature extending along the longitudinal body and being interrupted by at least one cross-cut,

wherein the upper and lower members are configured to hinge relative to each other about the interlocking scissor feature upon the implant distractor being distally inserted between the first and second members, the threaded slot arrangement of the first member is adapted to threadably receive the coil shaped thread feature of the implant distractor, and the truncated slot is adapted to engage the cross-cut of the coil shaped thread feature.

8. The implant of claim 7, wherein the proximal end of the first member or the second member comprises a guide feature adapted to receive and guide the distal termination of the implant distractor between the first and second members.

9. The implant of claim 8, wherein the guide feature comprises a half-conical feature.

10. The implant of claim 7, further comprising a weld extending on at least a portion of the interlocking scissor feature.

11. The implant of claim 7, wherein at least one of the first member or the second member comprises at least one lateral edge and a plurality of teeth spaced along the at least one lateral edge.

12. The implant of claim 7, wherein the cross-cut being engaged with the truncated slot helps to resist the implant distractor from backing out from between the first and second members.

13. The implant of claim 7, wherein the implant distractor is advanced between the first and second members via a threading action between the coil shaped thread feature and threaded slot arrangement.

14. The implant of claim 7, wherein the coil shaped thread feature is received by the threaded slot arrangement such that at least a portion of the coil shaped thread feature projects through the threaded slot arrangement and outwardly past the outer surface of the first member.

15. A spinal implant comprising:

a first member comprising a first distal end, a first proximal end opposite the first distal end, an inner surface, an outer surface on a side of the first member opposite the inner surface, and at least one slot defined in the inner surface of the first member, wherein the inner and outer surfaces are located between the first distal end and the first proximal end, and the at least one slot comprises a truncated slot;

a second member comprising a second distal end and a second proximal end opposite the second distal end, wherein the first distal end is coupled to the second distal end via an interlocking scissor feature positioned near the first and second distal ends; and

an implant distractor comprising a thread feature comprising a cross-cut portion, the implant distractor adapted to be advanced between the first and second members, the advancement being at least assisted by the thread feature being threadably received in the at least one slot, the advancement of the implant distractor between the first and second members causing the first and second members to hinge relative to each other about the interlocking scissor feature,

wherein the truncated slot is adapted to receive the cross-cut portion of the thread feature, thereby helping to resist the implant distractor from backing out from between the first and second members.

16. The implant of claim 15, wherein the at least one slot passes through the first member from the inner surface to the outer surface.

17. The implant of claim 16, wherein the at least one thread feature being threadably received in the at least one slot results in at least a portion of the thread feature protruding through the at least one slot outward past the outer surface.

18. The implant of claim 15, wherein the first and second members hinging relative to each other about the interlocking scissor feature results in increasing separation between the first and second proximal ends.

19. The implant of claim 15, wherein at least on one of the first member and the second member comprises at least one lateral edge and a plurality of teeth spaced along the at least one lateral edge.

20. The implant of claim 15, wherein at least one of the first member or second member comprises a guide feature for receiving and guiding the implant distractor between the first and second members when the implant distractor is initially beginning to be advanced between the first and second members.

21. The implant of claim 15, further comprising a weld extending on at least a portion of the interlocking scissor feature.