Arcuate fixation member

• US 10,105,236 B2
• Filed: 08/01/2016
• Issued: 10/23/2018
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: Donner, Thomas, Laurence, Lawton, Singhatat, Wamis, Schoenly, Jared, Evans, David E., Miller, William, Schmura, Kurt
• Primary Examiner(s): Johanas, Jacqueline
• Application Number:
  US15/225,537
• Publication Number:
  US 20160338853A1
• Time in Patent Office: 813 Days
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7037 wherein pivoting is blocked when the rod is clamped
• CPC Class Codes: A61B 17/7044 also having plates, staples or washers bearing on the vertebrae
• CPC Class Codes: A61B 17/7056 Hooks with specially-designed bone-contacting part
• CPC Class Codes: A61B 17/7076 for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
• CPC Class Codes: A61B 17/8042 the additional component being a cover over the screw head
• CPC Class Codes: A61B 17/8052 immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
• CPC Class Codes: A61B 17/92 Impactors or extractors, e.g. for removing intramedullary devices insertion or extraction of artificial joints A61F2/4603
• CPC Class Codes: A61B 2017/8655 with special features for locking in the bone
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• 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 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• 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 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/0081 directly machined on the prosthetic surface, e.g. holes, grooves A61F2/30771 takes precedence
• 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 2002/30306 : harpoon-shaped
• CPC Class Codes: A61F 2002/30387 : Dovetail 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 2002/30514 : using a locking washer
• CPC Class Codes: A61F 2002/30517 : using a locking plate
• CPC Class Codes: A61F 2002/30578 : having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30593 : hollow
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30777 : Oblong apertures
• CPC Class Codes: A61F 2002/30784 : Plurality of holes
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30843 : Pyramidally-shaped
• CPC Class Codes: A61F 2002/30845 : with cutting edges
• CPC Class Codes: A61F 2002/30879 : Ribs
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4615 : of spacers
• 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 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2220/0008 : Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 : with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0097 : Harpoon-shaped
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue

Abstract

Arcuate fixation members with varying configurations and/or features are provided, along with additional components for use therewith in provided fixation systems and intervertebral implant systems. The arcuate fixation members may be of varying lengths, cross sectional geometries, and/or cross sectional areas, and may be configured with various features such as heads configured to accept other fixation system components, tabs to allow arcuate fixation member-in-arcuate fixation member or fixation anchor-in-arcuate fixation member configurations. Applications of fixation systems and intervertebral implants systems utilizing arcuate fixation members are particularly suitable when a linear line-of-approach for delivering fixation members is undesirable.

Claims

1. An intervertebral implant system comprising:

an implant body defining a first bone-engaging surface and an opposed second bone-engaging surface, the first and second bone-engaging surfaces configured to engage adjacent vertebral bodies when the implant body is inserted into an intervertebral space;

a fixation plate that is separate from and attachable to the implant body, the fixation plate including lateral sides spaced from each other along a lateral direction, the lateral sides defining associated access grooves, each access groove defining an engagement element therein, the fixation plate further defining at least one curved aperture extending therethrough, wherein the at least one curved aperture is located between the access grooves with respect to the lateral direction;

at least one curved fixation member configured to be received within the at least one curved aperture, the at least one curved fixation member having a proximal end and a distal end opposite the proximal end, the distal end comprising a tip configured to cut into a vertebral body, the at least one curved fixation member having a length greater than a length of the at least one curved aperture such that the tip can be driven through the at least one curved aperture and into the vertebral body;

a delivery instrument comprising;

a pair of insertion rods comprising proximal ends and distal ends opposite the proximal ends, the distal ends each comprising an engagement member configured to releasably grip the engagement element within the associated access groove so as to releasably couple the delivery instrument to the fixation plate;

a guide ring having an inner surface with a plurality of curved guiding slots formed therein, the curved guiding slots configured to guide a plurality of curved fixation members into the curved apertures, wherein the plurality of curved fixation members comprises the at least one curved fixation member; and

a drive head configured to impart a force to the at least one curved fixation member that biases the tip of the at least one curved fixation member into the vertebral body.

2. The intervertebral implant system of claim 1, wherein the drive head has a plurality of curved receptors formed therein, each of the curved receptors configured to releasably receive the proximal end of the at least one curved fixation member.

3. The intervertebral implant system of claim 1, wherein the delivery instrument further comprises a drive shaft having a first proximal end and a first distal end opposite the first proximal end, the drive shaft configured to carry the guide ring and the drive head.

4. The intervertebral implant system of claim 1, wherein:

the pair of insertion rods further comprise a pair of longitudinal slots formed therein between the proximal ends and distal ends; and

the delivery instrument further comprises a carriage having a pair of lateral wings configured to be slidably received within the longitudinal slots, the carriage configured to carry the guide ring and the drive head.

5. The intervertebral implant system of claim 4, wherein the delivery instrument further comprises a mounting block affixed to the pair of insertion rods and a pinion drive affixed to the mounting block, the mounting block is configured to slidably receive a driving rack, and the pinion drive is configured to drivingly engage the driving rack.

6. The intervertebral implant system of claim 5, wherein the driving rack is affixed to the carriage, such that, when the pinion drive applies a driving force to the driving rack, the driving rack imparts the driving force to the carriage and advances the carriage in a longitudinal direction towards the fixation plate, thereby imparting the force to the at least one curved fixation member.

7. The intervertebral implant system of claim 1, wherein the engagement member at the distal ends of each of the pair of insertion rods is a rib, and the pair of corresponding engagement elements of the fixation plate include a pair of retaining shelves formed in the associated access grooves of the fixation plate.

8. The intervertebral implant system of claim 7, wherein the delivery instrument includes an end block coupled to the proximal ends of the pair of insertion rods, and the pair of insertion rods are rotatably received within associated bores formed in a posterior surface of the end block.

9. The intervertebral implant system of claim 8, wherein each of the pair of insertion rods includes gripping features formed in an outer surface of each of the pair of insertion rods.

10. The intervertebral implant system of claim 9, wherein the gripping features include longitudinal slots formed in the associated outer surfaces of the pair of insertion rods.

11. An intervertebral implant system, comprising:

an implant body defining a first bone-engaging surface and an opposed second bone-engaging surface, the first and second bone-engaging surfaces configured to engage adjacent vertebral bodies when the implant body is inserted into an intervertebral space;

a fixation plate that is separate from and attachable to the implant body, the fixation plate including lateral sides spaced from each other along a lateral direction, the lateral sides defining associated access grooves, each access groove defining an engagement element therein, the fixation plate further defining at least one curved aperture extending therethrough, wherein the at least one curved aperture is located between the access groove with respect to the lateral direction;

at least one curved fixation member configured to be received within the at least one curved aperture, the at least one curved fixation member having a proximal end and a distal end opposite the proximal end, the distal end comprising a tip configured to cut into a vertebral body, the at least one curved fixation member having a length greater than a length of the at least one curved aperture such that the tip can be driven through the at least one curved aperture and into the vertebral body;

a delivery instrument comprising;

a pair of arms comprising proximal ends and distal ends opposite the proximal ends, the distal ends each comprising an engagement member configured to releasably grip the engagement element within the associated access groove so as to releasably couple the delivery instrument to the fixation plate; and

a guide member defining a plurality of guiding slots formed therein, the plurality of guiding slots configured to

     1) guide the at least one curved fixation member into the at least one curved aperture, and

     2) allow a force to be applied to the at least one curved fixation member that biases the tip of the at least one curved fixation member into the vertebral body.

12. The intervertebral implant system of claim 11, wherein the at least one curved fixation member includes teeth disposed between the proximal end and the distal end of the at least one curved fixation member.

13. The intervertebral implant system of claim 11, wherein the implant body comprises:

a posterior side; and

lateral sides that terminate in distal ends opposite the posterior side,

wherein a height of the implant body, measured between the first and second bone-engaging surfaces, increases from the posterior side in a direction toward the distal ends of the lateral sides of the implant body.

14. The intervertebral implant system of claim 11, wherein:

the pair of arms comprise a pair of longitudinal slots formed therein between the proximal ends and distal ends; and

the delivery instrument further comprises a carriage having a pair of lateral wings configured to be slidably received within the longitudinal slots, the carriage configured to carry the guide member.

15. The intervertebral implant system of claim 14, wherein the delivery instrument further comprises a drive head carried by the carriage, and the drive head is configured to impart the force to the at least one curved fixation member that biases the tip of the at least one curved fixation member into the vertebral body.

16. The intervertebral implant system of claim 15, wherein the delivery instrument further comprises a mounting block affixed to the pair of arms and a pinion drive affixed to the mounting block, the mounting block is configured to slidably receive a driving rack, and the pinion drive is configured to drivingly engage the driving rack.

17. The intervertebral implant system of claim 11, wherein the engagement member of each of the pair of arms is sized and configured to releasably grip the engagement element within the associated access groove responsive to rotation of the associated arm.

18. The intervertebral implant system of claim 17, wherein the delivery instrument includes an end block coupled to the proximal ends of the pair of arms, and the pair of arms are rotatably received within associated bores formed in a posterior surface of the end block.

19. An intervertebral implant system, comprising:

an implant body defining a first bone-engaging surface and an opposed second bone-engaging surface, the first and second bone-engaging surfaces configured to engage adjacent vertebral bodies when the implant body is inserted into an intervertebral space;

a fixation plate attached to the implant body, the fixation plate defining at least one curved aperture extending therethrough;

at least one curved fixation member configured to be received within the at least one curved aperture, the at least one curved fixation member having a proximal end and a distal end opposite the proximal end, the distal end comprising a tip configured to cut into a vertebral body, the at least one curved fixation member having a length greater than a length of the at least one curved aperture such that the tip can be driven through the at least one curved aperture and into the vertebral body;

a delivery instrument comprising;

a pair of arms comprising proximal ends and distal ends opposite the proximal ends, the distal ends configured to releasably grip the fixation plate, the pair of arms comprising a pair of longitudinal slots formed therein between the proximal ends and distal ends;

a carriage having a pair of lateral wings configured to be slidably received within the pair of longitudinal slots; and

a guide member carried by the carriage, the guide member defining at least one guiding slot formed therein, the at least one guiding slot configured to

     1) guide the at least one curved fixation member into the at least one curved aperture, and

     2) allow a force to be applied to the at least one curved fixation member that biases the tip of the at least one curved fixation member into the vertebral body.