WO2014163931A4 - Expandable interbody fusion device with graft chambers - Google Patents

Expandable interbody fusion device with graft chambers Download PDF

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Publication number
WO2014163931A4
WO2014163931A4 PCT/US2014/018982 US2014018982W WO2014163931A4 WO 2014163931 A4 WO2014163931 A4 WO 2014163931A4 US 2014018982 W US2014018982 W US 2014018982W WO 2014163931 A4 WO2014163931 A4 WO 2014163931A4
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WO
WIPO (PCT)
Prior art keywords
endplate
opening
insert
guide pin
channel
Prior art date
Application number
PCT/US2014/018982
Other languages
French (fr)
Other versions
WO2014163931A3 (en
WO2014163931A2 (en
Inventor
Scott Mclean
Fabio Amaral PINTO
Peter Barreiro
David Boisvert
Original Assignee
Spine Wave, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spine Wave, Inc. filed Critical Spine Wave, Inc.
Priority to EP14779936.5A priority Critical patent/EP2967913B1/en
Priority to CA2901792A priority patent/CA2901792C/en
Priority to JP2016500460A priority patent/JP6058203B2/en
Priority to AU2014249897A priority patent/AU2014249897B2/en
Publication of WO2014163931A2 publication Critical patent/WO2014163931A2/en
Publication of WO2014163931A3 publication Critical patent/WO2014163931A3/en
Publication of WO2014163931A4 publication Critical patent/WO2014163931A4/en

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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/3093—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth for promoting ingrowth of bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2002/4625—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
    • A61F2002/4627—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0008—Fixation appliances for connecting prostheses to the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
    • A61F2250/0009—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material

Abstract

An expandable interbody fusion device includes superior and inferior endplates that are configured to receive a sequentially inserted stack of expansion members or wafers in interlocking engagement. The expansion members are formed to each have a generally U- shaped rearward facing opening. The superior and inferior endplates have openings through their outer surfaces in at least partial alignment and communication with the rearward facing openings of the expansion members. The inferior endplate has a fully bounded cavity for telescoping receipt of the superior endplate. The inferior endplate also has a fully bounded channel extending through the rear endwall thereof in direct communication with the rearward facing opening of at least one expansion member for the receipt of bone graft material into the device to promote fusion between opposing vertebral bodies of the spine.

Claims

AMENDED CLAIMS received by the International Bureau on 24 April 2015 (24.04.2015) What is claimed is:
1. An expandable interbody fusion device for implantation into an intradiscal space between two opposing vertebral bodies of a spine, comprising:
a first endplate having an outer surface configured to contact one of said vertebral bodies and an opening extending through said outer surface;
a second endplate having an outer surface configured to contact the other vertebral body and an inner support surface, said second endplate having opposing spaced apart sidewalls and opposing spaced apart front and rear endwalls defining therewithin a fully bounded interior cavity, said support surface being within said interior cavity, said first endplate being received within said interior cavity, said second endplate having at least one opening extending through said outer surface and said support surface and communicating with said interior cavity, said rear endwall defining therethrough a fully bounded channel in communication with said interior cavity, said first endplate being movable in an expansion direction relative to said second endplate toward the opposing vertebral body;
at least one insert having an upper surface, an opposite lower surface, a front end, a rear end and an open rearward facing opening extending through said upper surface, said lower surface and the rearmost surface of said rear end, said at least one insert being configured to be introduced between said first endplate and said second endplate through said channel into said interior cavity in an insertion direction that is substantially perpendicular to said expansion direction and supported by said support surface therewithin with the front end of said insert adjacent the front endwall of said second endplate and the rear end of said insert adjacent the rear endwall of said second endplate, said rearward facing opening
communicating with said channel and being in at least partial alignment with said openings through said first endplate and said second endplate; and
locking surfaces on said at least one insert to lock said at least one insert in said device.
2. The device of claim 1, wherein said at least one insert includes a pushing surface between said upper and lower surface within and communicating with said open rearward facing opening.
17
3. The device of claim 2, wherein a locking surface of said locking surfaces on said at least one insert is disposed on one of said upper surface and said lower surface adjacent the front end of said insert, and wherein said open rearward facing opening defines a U-shaped opening, the base of said opening defining said pushing surface.
4. The device of claim 3, wherein said locking surface includes at least one resiliently interlocking element.
5. The device of claim 4, wherein said locking surfaces further include a T-bar configuration on one of said upper surface and said lower surface and a T-bar configuration on the other of said upper surface and said lower surface.
6. The device of claim 5, including at least two of said inserts at least one insert of substantially identical configuration.
7. The device of claim 1, wherein the material of said second endplate is substantially radiopaque and said second endplate has at least one window therethrough for observation of one of said first endplate and said at least one insert during expansion of said device.
8. The device of claim 1, further including a threaded opening through the rear endwall of said second endplate, said threaded opening being spaced from said channel and configured for threaded receipt of a guide pin of an inserter for inserting said device into the intradiscal space between said two opposing vertebral bodies.
9. An apparatus for use in spinal interbody fusion, comprising:
an expandable device including a first outer surface for contacting one vertebral body in a spine and a second outer surface for contacting a second opposing vertebral body in said spine, a front end and a rear end, said device comprising a first opening through said first outer surface and a second opening through said second outer surface and a channel through said rear end, said guide pin being releasably connected to said device at a location spaced from said channel; and
18 an inserter releasably attached to said device at said rear end and including a track for inserting an insert into said expandable device, said inserter comprising a guide pin releasably connected to said device and detachably connected to said inserter, said inserter supporting a plurality of inserts for sequential insertion into said channel, one beneath the other, each of said inserts having a rearward facing opening and a pushing surface engaged by a driver of said inserter to insert said inserts into said device.
10. The apparatus of claim 9, wherein said device comprises at least one window therethrough for observation of said inserts during expansion of said device.
1 1. The apparatus of claim 10, wherein each of said inserts is formed of a biocompatible polymer.
12. The apparatus of claim 9, wherein said guide pin is releasably connected with said device upon detachment of said inserter from said device and said guide pin, said guide pin serving as a locator for subsequent attachment to another apparatus, including an apparatus for introducing graft material into said device through said channel.
13. The apparatus of claim 9, wherein said expandable device comprises a first endplate defining said first outer surface and said first opening therethrough, and a second endplate defining said second outer surface and said second opening therethrough, said first endplate and said second endplate being movable relative to each other in an expansion direction.
14. The apparatus of claim 13, wherein said second endplate includes said channel at a rear end thereof, said rear end of said second endplate including an attachment surface for releasable attachment of said inserter.
19
15. The apparatus of claim 14, wherein said attachment surface includes at least one notch adjacent the rear end of said second endplate.
16. The apparatus of claim 15, wherein said inserter includes a distal end comprising at least one finger releasably engaged in said at least one notch.
17. The apparatus of claim 13, wherein said guide pin is elongate having a distal end and a proximal end, the distal end having a threaded extent, and wherein said attachment surface includes a threaded opening in receipt of said threaded extent of said guide pin.
18. The apparatus of claim 17, wherein said inserter includes a track assembly having a distal end and a proximal end, said track assembly supporting said guide pin and being detachable therefrom.
19. The apparatus of claim 18, wherein said inserter includes a rotatable quick disconnect member at the proximal end of said track assembly for allowing said track assembly to be detached from said guide pin while said guide pin remains releasably connected to said rear end of said second endplate.
20. The apparatus of claim 13, wherein one of said first endplate and said second endplate is formed of titanium.
21. The apparatus of claim 18, wherein said track assembly further comprises an elongate driver translatably movable thereon, said driver having a distal end and a proximal end, the distal end being configured to engage the pushing surface on each said insert and drive said insert into said expandable device through said channel.
20
22. The apparatus of claim 21, wherein said insert comprises an elongate body having a front end, a rear end, and a rearward facing opening defining a U-shaped opening, a base of said opening defining a pushing surface.
23. The apparatus of claim 22, wherein said driver is sized and configured to enter said U-shaped opening of said insert and engage said pushing surface of said insert.
24. The apparatus of claim 23, wherein said inserter includes an actuator attached to said track assembly and operable to translatably move said driver along said track assembly.
25. An apparatus for use in spinal interbody fusion, comprising:
an expandable device including a first outer surface for contacting one vertebral body in a spine and a second outer surface for contacting a second opposing vertebral body in said spine, a front end and a rear end, a channel through said rear end and an attachment surface on said rear end at a location spaced from said channel, said device comprising a first opening through said first outer surface and a second opening through said second outer surface and a plurality of inserts sequentially inserted into said device, one beneath the other, between said first outer surface and said second outer surface, each of said inserts having a rearwardly facing U-shaped opening in communication with each other and with the openings through said first and second outer surfaces; and
a guide pin releasably attached to said expandable device at said attachment surface thereof.
26. The apparatus of claim 25, further comprising bone graft material received into said expandable device through said channel while said guide pin is releasably attached to said the expandable device.
21
27. The apparatus of claim 26, wherein said guide pin is releasably connected to said device at a location spaced from said channel, said bone graft being disposed in said U- shaped openings of said inserts within said expandable device and into said first opening and said second opening.
28. The apparatus of claim 25, wherein said guide pin is elongate, one end of which comprises a threaded extent, said attachment surface on said rear end of said expandable device being defined by a threaded opening in receipt of said threaded extent of said guide pin.
22
PCT/US2014/018982 2013-03-12 2014-02-27 Expandable interbody fusion device with graft chambers WO2014163931A2 (en)

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EP14779936.5A EP2967913B1 (en) 2013-03-12 2014-02-27 Expandable interbody fusion device with graft chambers
CA2901792A CA2901792C (en) 2013-03-12 2014-02-27 Expandable interbody fusion device with graft chambers
JP2016500460A JP6058203B2 (en) 2013-03-12 2014-02-27 Expandable interbody fusion device with graft chamber
AU2014249897A AU2014249897B2 (en) 2013-03-12 2014-02-27 Expandable interbody fusion device with graft chambers

Applications Claiming Priority (2)

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US13/795,054 2013-03-12
US13/795,054 US8900312B2 (en) 2013-03-12 2013-03-12 Expandable interbody fusion device with graft chambers

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WO2014163931A2 WO2014163931A2 (en) 2014-10-09
WO2014163931A3 WO2014163931A3 (en) 2015-04-30
WO2014163931A4 true WO2014163931A4 (en) 2015-06-18

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EP (1) EP2967913B1 (en)
JP (1) JP6058203B2 (en)
AU (1) AU2014249897B2 (en)
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US20150088260A1 (en) 2015-03-26
US20140277476A1 (en) 2014-09-18

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