Limited profile intervertebral implant with incorporated fastening and locking mechanism

• US 10,398,565 B2
• Filed: 11/23/2016
• Issued: 09/03/2019
• Est. Priority Date: 04/24/2014
• Status: Active Grant

• Current Assignee: Choice Spine, LLC (ChoiceSpine, LP)
• Original Assignee: Choice Spine, LLC (ChoiceSpine, LP)
• Inventors: Bender, Mark W, Norton, Steven J, McAtamney, Jason A., Hickey, Larry G.
• Primary Examiner(s): Hammond, Ellen C
• Application Number:
  US15/360,399
• Publication Number:
  US 20170135822A1
• Time in Patent Office: 1,014 Days
• CPC Class Codes: A61B 17/0642 for bones, e.g. for osteosynthesis or connecting tendon to bone
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• 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 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30476 locked by an additional locking mechanism
• CPC Class Codes: A61F 2002/30505 spring biased
• CPC Class Codes: A61F 2002/30528 Means for limiting said movement
• 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 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/3093 for promoting ingrowth of bone tissue

Abstract

In some embodiments, an intervertebral implant may include a body including a superior and an inferior surface. The implant may include a first channel extending from an anterior end towards the posterior end of the body. The implant may include a first anchor channel. The implant may include a first guide member positionable in the first channel. The implant may include a first anchor. When the first guide member moves from a first position to a second position the first anchor may be conveyed through the first anchor channel and couple the body to an adjacent vertebra. In some embodiments, the implant may include a first locking mechanism which inhibits, during use, the first guide member from moving from the second position to the first position upon activation of the first locking mechanism.

Claims

1. An intervertebral implant, comprising:

a body comprising a superior surface and an inferior surface, wherein at least a portion of the superior surface is configured to contact an endplate of an upper adjacent vertebra during use, and wherein the inferior surface is configured to contact an endplate of a lower adjacent vertebra during use;

a first channel extending from an anterior end towards a posterior end of the body;

a first anchor channel, wherein a first end of the first anchor channel is coupled to the first channel adjacent the anterior end and a second end of the first anchor channel extends through a superior or inferior face of the body;

a first guide member positionable in the first channel, wherein the first guide member is movable from a first position, a first end of the first guide member extending from the anterior end of the body, to a second position, the first end of the first guide member substantially flush with the anterior end of the body, during use;

a first anchor coupled to the first end of the first guide member, wherein when the first guide member moves from the first position to the second position the first anchor is conveyed through the first anchor channel and is capable of coupling the body to the upper or lower adjacent vertebra during use; and

a first locking mechanism which inhibits, during use, the first guide member from moving from the second position to the first position upon activation of the first locking mechanism.

2. The implant of claim 1, wherein the first locking mechanism visually indicates, during use, to a user if the first locking mechanism has been activated.

3. The implant of claim 1, further comprising:

a second channel extending from the anterior end to the posterior end of the body, wherein the first and the second channels are positioned on substantially opposing sides of the body;

a second anchor channel, wherein a first end of the second anchor channel is coupled to the second channel adjacent the anterior end and a second end of the second anchor channel extends through the superior or the inferior face of the body;

a second guide member positionable in the second channel, wherein the second guide member is movable from a first position, a first end of the guide member extending from the anterior end of the body, to a second position, the first end of the guide member substantially flush with the anterior end of the body, during use;

a second anchor coupled to the first end of the second guide member,

wherein when the second guide member moves from the first position to the second position the second anchor is conveyed through the second anchor channel and is capable of coupling the body to the upper or the lower adjacent vertebra during use; and

a second locking mechanism which inhibits, during use, the second guide member from moving from the second position to the first position upon activation of the second locking mechanism.

4. The implant of claim 1, wherein the first locking mechanism comprises:

a locking member; and

a resilient member which biases the locking member in a locked position.

5. The implant of claim 1, wherein the first anchor comprises a plurality of ridges along at least one edge of the first anchor, wherein at least some of the plurality of ridges are oriented in a direction substantially opposing to a direction of insertion of the first anchor in the upper or the lower adjacent vertebra during use.

6. The implant of claim 1, wherein the first guide member comprises a second member coupled towards a distal end of the first guide member.

7. The implant of claim 1, wherein the first guide member comprises a second member coupled towards a distal end of the first guide member, wherein the second member comprises an engager, and wherein the engager interacts, during use, with a first feature to inhibit movement of the first guide member in the first channel.

8. The implant of claim 1, wherein the first guide member comprises:

a second member positioned towards a distal end of the first guide member, wherein the second member comprises an engager, and wherein the engager interacts, during use, with a first feature to inhibit movement of the first guide member in the first channel; and

a stop positioned towards a distal end of the first guide member and proximal to the second member, wherein the stop interacts, during use, with a second feature to inhibit movement of the first guide member in the first channel.

9. The implant of claim 1, wherein the first guide member comprises:

a second member positioned towards a distal end of the first guide member, wherein the second member comprises an engager, and wherein the engager interacts, during use, with a first feature to inhibit movement of the first guide member in the first channel from the second position to the first position; and

a stop positioned towards a distal end of the first guide member and proximal to the second member, wherein the stop interacts, during use, with a second feature to inhibit movement of the first guide member in the first channel from the first position to the second position.

10. The implant of claim 9, wherein the first and/or second feature comprises an elongated member positioned at least partially in the first channel.

11. The implant of claim 1, wherein substantially all of an outer perimeter of the body of the implant is positionable within the outer perimeter of the upper and lower adjacent vertebrae after installation.

12. The implant of claim 1, wherein the first guide member comprises a coupling member adjacent the first end of the guide member, and wherein the first anchor comprises an opening into which the coupling member is positionable.

13. The implant of claim 1, wherein the first guide member comprises a coupling member adjacent the first end of the guide member, and wherein the coupling member comprises a post.

14. The implant of claim 1, wherein the anterior end comprises an opening, and wherein the opening is configurable to couple to an insertion instrument.

15. A method of implanting an intervertebral implant within an intervertebral space between endplates of adjacent vertebra, comprising the steps:

implanting an intervertebral implant between an upper adjacent vertebra and a lower adjacent vertebra, the intervertebral implant comprising;

a body comprising a superior surface and an inferior surface, wherein at least a portion of the superior surface is configured to contact an endplate of an upper adjacent vertebra during use, and wherein the inferior surface is configured to contact an endplate of a lower adjacent vertebra during use;

a first channel extending from an anterior end towards a posterior end of the body;

a first anchor channel, wherein a first end of the first anchor channel is coupled to the first channel adjacent the anterior end and a second end of the first anchor channel extends through a superior or inferior face of the body;

a first guide member positionable in the first channel, wherein the first guide member is movable from a first position, a first end of the first guide member extending from the anterior end of the body, to a second position, the first end of the first guide member substantially flush with the anterior end of the body, during use;

a first anchor coupled to the first end of the first guide member, wherein when the first guide member moves from the first position to the second position the first anchor is conveyed through the first anchor channel and is capable of coupling the body to the upper or lower adjacent vertebra during use; and

a locking mechanism which inhibits, during use, the first guide member from moving from the second position to the first position upon activation of the locking mechanism, wherein the intervertebral implant is implanted such that the superior surface of the body of the intervertebral implant contacts the endplate of the upper adjacent vertebra and the inferior surface of the body contacts the endplate of the lower adjacent vertebra;

conveying the first guide member through the first channel from the first position, the first end of the first guide member extending from the anterior end of the body, to the second position, the first end of the first guide member substantially flush with the anterior end of the body, during use;

conveying the first anchor through the first anchor channel when the first guide member moves from the first position to the second position, wherein the first end of the first anchor channel is coupled to the first channel adjacent the anterior end and a second end of the first anchor channel extends through the superior and/or the inferior face of the body;

coupling the body to at least one of the adjacent vertebrae using the first anchor; and

inhibiting the first guide member from moving from the second position to the first position upon activation of the locking mechanism.

16. The method of claim 15, further comprising biasing a locking member of the locking mechanism in a locked position using a resilient member of the locking mechanism.

17. The method of claim 15, further comprising:

engaging a first feature using an engager of a second member coupled towards a distal end of the first guide member; and

inhibiting movement of the first guide member in the first channel using the engaged engager.

18. The method of claim 15, further comprising:

engaging a first feature using an engager of a second member coupled towards a distal end of the first guide member;

inhibiting movement of the first guide member in the first channel from the second position to the first position using the engaged engager; and

interacting a stop with a second feature such that movement of the first guide member is inhibited in the first channel from the first position to the second position, wherein the stop is positioned towards a distal end of the first guide member and proximal to the second member.

19. The method of claim 18, wherein the first and/or second feature comprises an elongated member positioned at least partially in the first channel.

20. The method of claim 15, further comprising coupling an insertion instrument to an opening in the anterior end of the body.