System and method for implant anchorage with anti-rotation features

• US 9,050,144 B2
• Filed: 08/29/2008
• Issued: 06/09/2015
• Est. Priority Date: 04/17/2007
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Gmedelaware 2 LLC (Globus Medical, Inc.)
• Inventors: Fauth, Andrew R., Triplett, Daniel J., Helgerson, Joel R., Goble, E. Marlowe, Hoy, Robert W, Justin, Danile F
• Primary Examiner(s): Hoffman, Mary
• Assistant Examiner(s): CARTER, TARA ROSE E
• Application Number:
  US12/201,086
• Publication Number:
  US 20080319485A1
• Time in Patent Office: 2,475 Days
• Field of Search: 606246-279, 623 1711- 1716
• US Class Current: 1/1
• CPC Class Codes: A61B 17/7005 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
• CPC Class Codes: A61B 17/7035 Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
• CPC Class Codes: A61B 17/704 the longitudinal element passing through a ball-joint in the screw head
• CPC Class Codes: A61B 17/7064 Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
• CPC Class Codes: A61B 17/7067 Devices bearing against one or more spinous processes and also attached to another part of the spine; Tools therefor
• CPC Class Codes: A61B 17/707 Devices acting on, or attached to, a transverse process or rib; Tools therefor
• CPC Class Codes: A61B 2017/7073 with intervertebral connecting element crossing an imaginary spinal median surface
• CPC Class Codes: A61F 2/0095 Packages or dispensers for prostheses or other implants for intraocular lenses A61F2/1691; for dental surgery A61C19/02
• 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 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• 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 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• 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 2002/30481 using a locking clip
• CPC Class Codes: A61F 2002/30495 using a locking ring
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30522 releasable, e.g. using a releasable ratchet
• CPC Class Codes: A61F 2002/30537 adjustable
• CPC Class Codes: A61F 2002/3054 : about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/3055 : for adjusting length
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30649 : Ball-and-socket joints
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30845 : with cutting edges
• 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 2002/30904 : 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 2002/449 : comprising multiple spinal implants located in different intervertebral spaces or in different vertebrae
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/0091 : connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2250/0004 : adjustable
• CPC Class Codes: A61F 2250/0007 : for adjusting length
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

A system includes an implant with an articulation surface, a fixation member which may be anchored in a bone, and a base portion which may receive the fixation member. The base member may comprise a bone-engaging portion and an attachment portion. The base member may receive the fixation member such that a threaded portion of the fixation member and the bone-engaging portion of the base member may be seated in the bone. The implant may be attached to the attachment portion of the base member. The base member may be configured in a variety of shapes and may include fins, teeth, pegs or other anti-rotation features, and may include a bone ingrowth surface. The attachment portion may be tapered and attachable to the implant through a taper-lock.

Claims

1. A system comprising:

a fixation member comprising a proximal end and a distal end implantable in a bone to secure the fixation member to the bone;

an implant comprising a fixation portion and an articulation surface shaped to articulate with an adjacent implant or natural articulation surface;

a base member shaped to receive the distal end, the base member comprising a bone-engaging portion and an attachment portion configured to be secured to the implant, wherein the bone-engaging portion and the attachment portion are separated by a flange having a width greater than a width of the bone-engaging portion and the attachment portion, wherein the bone-engaging portion is tapered to provide compression to surrounding bone, wherein the base member further comprises a tool engagement rim including a plurality of notches, wherein the bone-engaging portion comprises a tapered outer surface having a plurality of fins disposed around the tapered outer surface; and

an expandable member positioned between the implant and the base member, wherein the expandable member is configured to extend around the attachment portion of the base member,

wherein the fixation portion is attachable to the attachment portion in any of a plurality of orientations of the implant relative to the base member to permit polyaxial adjustment of an orientation of the articulation surface relative to the base member prior to attachment of the fixation portion to the attachment portion;

and wherein the fixation portion of the implant is a ring configured to surround the expandable member.

2. The system of claim 1, wherein the implant is a facet joint replacement implant and the articulation surface comprises a prosthetic facet articulation surface.

3. The system of claim 2, wherein the fixation member is a pedicle screw implantable in a pedicle of a vertebra.

4. The system of claim 1, wherein the base member further comprises at least one anti-rotation feature shaped to project into the bone to prevent rotation of the base member relative to the bone.

5. The system of claim 1, wherein the flange portion is shaped to prevent subsidence of the attachment portion into the bone.

6. The system of claim 1, wherein the base member is monolithically formed.

7. The system of claim 1, wherein the attachment portion comprises a first tapered surface and wherein the expandable member comprises a second tapered surface engageable with the first tapered surface to lock the fixation portion to the attachment portion.

8. The system of claim 1, wherein a proximal end of the fixation member is operable to secure the implant against the base member, the system further comprising a locking feature that is actuatable to engage the proximal end of the fixation member to prevent withdrawal of the implant from the base member.

9. The system of claim 8, wherein, when the locking feature is positioned to prevent withdrawal of the implant from the base member, the fixation portion encircles at least a portion of the fixation member.

19. The system of claim 1, wherein the expandable member is a ring having a plurality of slits configured to fit over the attachment portion of the base member.

10. A system comprising:

a fixation member comprising a proximal end and a distal end implantable in a bone to secure the fixation member to the bone;

an implant comprising a fixation portion and an articulation surface shaped to articulate with an adjacent implant or natural articulation surface;

a base member shaped to receive the distal end, the base member comprising a bone-engaging portion and an attachment portion configured to be secured to the implant, wherein the bone-engaging portion and the attachment portion are separated by a flange having a width greater than a width of the bone-engaging portion and the attachment portion, wherein the bone-engaging portion is tapered to provide compression to surrounding bone, wherein the base member further comprises a tool engagement rim including a plurality of notches, wherein the bone-engaging portion comprises a tapered outer surface having a plurality of fins disposed around the tapered outer surface; and

an expandable member positioned between the implant and the base member, wherein the expandable member is configured to extend around the attachment portion of the base member,

wherein a proximal end of the fixation member is operable to exert force urging the implant toward the bone to secure the implant against the base member; and

wherein the fixation portion of the implant is a ring configured to surround the expandable member.

11. The system of claim 10, wherein the implant is a facet joint replacement implant and the articulation surface comprises a prosthetic facet articulation surface.

12. The system of claim 11, wherein the fixation member is a pedicle screw implantable in a pedicle of a vertebra.

13. The system of claim 10, wherein the base member further comprises at least one anti-rotation feature shaped to project into the bone to prevent rotation of the base member relative to the bone.

14. The system of claim 10, wherein the flange portion is shaped to prevent subsidence of the attachment portion into the bone.

15. The system of claim 10, further comprising a locking feature, wherein the locking feature is actuatable to engage the proximal end of the fixation member to prevent withdrawal of the implant from the base member.

16. The system of claim 10, wherein the attachment portion comprises a first tapered surface and wherein the expandable member comprises a second tapered surface engageable with the first tapered surface to lock the fixation portion to the attachment portion.

17. The system of claim 15, wherein, when the locking feature is positioned to prevent withdrawal of the implant from the base member, the fixation portion encircles at least a portion of the fixation member.

18. The system of claim 10, wherein the base member is monolithically formed.