Intravertebral implants

• US 8,808,376 B2
• Filed: 03/25/2009
• Issued: 08/19/2014
• Est. Priority Date: 08/16/2005
• Status: Active Grant

• Current Assignee: IZI Medical Products LLC (Halma PLC)
• Original Assignee: Benvenue Medical, Inc. (Halma PLC)
• Inventors: Schaller, Laurent
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): HARVEY, JULIANNA NANCY
• Application Number:
  US12/410,961
• Publication Number:
  US 20090182386A1
• Time in Patent Office: 1,973 Days
• Field of Search: 606/90, 623 1711- 1716
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• CPC Class Codes: A61B 17/7097 Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444
• CPC Class Codes: A61B 17/8852 capable of being assembled or enlarged, or changing shape, inside the bone or disc
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• 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 2/4611 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 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30263 cubical
• CPC Class Codes: A61F 2002/30289 helically-coiled
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/3052 unrestrained in only one direction, e.g. moving unidirectionally
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30601 telescopic
• CPC Class Codes: A61F 2002/30677 : Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• 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 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 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4683 : by applying ultrasonic vibrations
• CPC Class Codes: A61F 2002/4688 : having operating or control means
• CPC Class Codes: A61F 2210/0014 : using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0085 : hardenable in situ, e.g. epoxy resins
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0075 : sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0084 : cubical
• CPC Class Codes: A61F 2230/0091 : helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2250/0067 : Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite

Abstract

Spinal tissue distraction devices that include a member which has a pre-deployed configuration for insertion between tissue layers and a deployed configuration in which the member, by change of configuration, forms a support structure for separating and supporting layers of spinal tissue.

Claims

1. An intravertebral implant for treating a vertebral body, comprising:

an elongated flexible implant having a longitudinal axis and comprising a cross-sectional size sufficiently small for insertion into a vertebral body and a plurality of passageways spaced apart along the longitudinal axis of the implant, the elongated implant curving along the longitudinal axis so as to extend more than 360 degrees about a vertical axis to define a helical configuration that substantially circumferentially encloses an internal volume, the helical configuration comprising a plurality of coils, each coil of the helical configuration being in substantial contact with any adjacent coils to substantially prevent vertical compression of the helical configuration and the passageways being in open and direct communication with the internal volume when the implant is in the helical configuration.

2. The intravertebral implant of claim 1 in which the implant extends fully around the vertical axis a plurality of times.

3. The intravertebral implant of claim 1 in which the implant includes a longitudinal channel in communication with the internal volume through the passageways.

4. The intravertebral implant of claim of 3 in which the channel and passageways are configured to allow the flow of bone cement therethrough and into the internal volume.

5. The intravertebral implant of claim 3 wherein each passageway comprises a slot extending through upper and lower surfaces of the elongated implant, the slots facing the internal volume and being open in the implant helical configuration so as to direct flow into the internal volume.

6. The intravertebral implant of claim 3 wherein the elongated implant has first and second ends, and the channel extends through the first end.

7. The intravertebral implant of claim 6 wherein the channel extends through the second end.

8. The intravertebral implant of claim 1 in which the passageways extend laterally between the internal volume and external of the helical configuration.

9. The intravertebral implant of claim 1 wherein the elongated implant is of sufficient length such that the helical configuration has a vertical extent sufficient to extend between and separate and/or support opposed end plates of a vertebral body.

10. The intravertebral implant of claim 1 wherein the implant further comprises a plurality of slots spaced apart along the longitudinal axis.

11. An intravertebral implant for treating a vertebral body, comprising:

an elongated flexible implant having a longitudinal axis and comprising a longitudinal channel therein and a plurality of passageways spaced apart along the longitudinal axis of the implant, the implant curving along the longitudinal axis so as to helically extend a plurality of times fully about a vertical axis and substantially circumferentially enclose an internal volume, the passageways being in communication with the longitudinal channel and in open and direct communication the internal volume and configured to allow flow of flowable material from the longitudinal channel into the internal volume when the implant is in the helical configuration; and

the implant defining a barrier in the helical configuration to substantially prevent the flow of flowable material radially from the internal volume.

12. The intravertebral implant of claim 11 further comprising a plurality of slots spaced apart along the longitudinal axis.

13. The intravertebral implant of claim 11 wherein each passageway comprises a slot extending through upper and lower surfaces of the elongated implant, the slots facing the internal volume and being open in the implant helical configuration so as to direct flow into the internal volume.

14. The intravertebral implant of claim 11 wherein the elongated implant is of sufficient length that the helical configuration has a vertical extent sufficient to extend between and separate and/or support opposed end plates of a vertebral body.

15. The intravertebral implant of claim 11 wherein the elongated implant has first and second ends and the channel extends through the first end.

16. The intravertebral implant of claim 15 wherein the channel extends through the second end.

17. The intravertebral implant of claim 11 in which the channel and passageways are configured to allow the flow of bone cement therethrough and into the internal volume.

18. An intravertebral implant for treating a vertebral body having opposed endplates, comprising:

an elongated flexible implant having a longitudinal axis and comprising a longitudinal channel and plurality of slots spaced apart along the longitudinal axis of the implant and communicating with the channel to allow flowable material to pass therethrough, the slots extending between upper and lower surfaces of the elongated implant, the elongated implant curving along the longitudinal axis so as to extend more than 360 degrees about a vertical axis to define a helical configuration and substantially enclose an internal volume, the helical configuration comprising a plurality of coils, each coil of the helical configuration being in substantial contact with any adjacent coils to substantially prevent vertical compression of the helical configuration, the helical configuration having a sufficient vertical extent to extend between opposed endplates and apply sufficient force to distract the opposed endplates of the vertebral body, and the slots also being in open and direct communication with the internal volume when the implant is in the helical configuration.

19. The intravertebral implant of claim 18 in which the channel and slots are configured to allow the flow of bone cement therethrough and into the internal volume.

20. The intravertebral implant of claim 18 wherein the elongated implant has first and second ends, and the channel extends through the first end.

21. The intravertebral implant of claim 20 wherein the channel extends through the second end.

22. The intravertebral implant of claim 18 wherein the elongated implant is of sufficient length such that the helical configuration has a vertical extent sufficient to extend between and separate and/or support opposed end plates of a vertebral body.

23. An intravertebral implant for treating a vertebral body, comprising:

an elongated flexible implant having a longitudinal axis and comprising a longitudinal channel and a plurality of slots spaced apart along the longitudinal axis of the implant and communicating with the channel to allow flowable material to pass therethrough, the slots extending through upper and lower surfaces of the elongated implant, the elongated implant curving along the longitudinal axis to extend more than 360degrees about a vertical axis to define a helical configuration comprising a plurality of coils, each coil being in substantial contact with adjacent coils so as to substantially circumferentially enclose an internal volume and substantially prevent vertical compression of the helical configuration, the helical configuration having a sufficient vertical extent to extend between opposed end plates of a vertebral body and apply sufficient force to distract;

the slots being in open and direct communication with the internal volume when the implant is in the helical configuration to allow flow of flowable material from the longitudinal channel into the internal volume when the implant is in the helical configuration; and

the implant defining a barrier in the helical configuration to substantially prevent the flow of flowable material radially from the internal volume.

24. The intravertebral implant of claim 23 wherein the longitudinal channel extends through a proximal end of the implant.

25. The intravertebral implant of claim 24 wherein the longitudinal channel extends through the proximal end and a distal end of the elongated implant.

26. The intravertebral implant of claim 23 wherein the elongated implant is of sufficient length such that the helical configuration has a vertical extent sufficient to extend between and separate and/or support opposed end plates of a vertebral body.

27. The intravertebral implant of claim 23 in which the channel and slots are configured to allow the flow of bone cement therethrough and into the internal volume.