SPINAL IMPLANT SYSTEM AND METHOD

• US 20170007420A1
• Filed: 07/06/2015
• Published: 01/12/2017
• Est. Priority Date: 07/06/2015
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Bontemps, Calvert S., Stevenson, Tyler S., Benson, Nicholas M., Brown, Richard L., Metcalf, Newton H., Tyler, Larry, Foley, Kevin T., Henschel, Mark E., Barror, Michael W.
• Granted Patent: US 10,123,882 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/0295 using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
• CPC Class Codes: A61B 5/032 Spinal fluid pressure
• CPC Class Codes: A61B 5/0537 Measuring body composition by impedance, e.g. tissue hydration or fat content
• CPC Class Codes: A61B 5/0538 invasively, e.g. using a catheter
• CPC Class Codes: A61B 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/4566 Evaluating the spine A61B5/4561 takes precedence
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/4851 Prosthesis assessment or monitoring
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/30052 differing in electric or magnetic properties
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30069 elastomeric
• CPC Class Codes: A61F 2002/3008 : radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30125 : elliptical or oval
• CPC Class Codes: A61F 2002/30131 : horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30133 : kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30156 : triangular
• CPC Class Codes: A61F 2002/30224 : cylindrical
• CPC Class Codes: A61F 2002/30593 : hollow
• CPC Class Codes: A61F 2002/3067 : for data transfer
• CPC Class Codes: A61F 2002/30677 : Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/3082 : Grooves
• CPC Class Codes: A61F 2002/30836 : knurled
• 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 2002/3092 : having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30971 : Laminates, i.e. layered products
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00077 : Copper or Cu-based alloys
• CPC Class Codes: A61F 2310/00113 : Silver or Ag-based alloys
• CPC Class Codes: A61F 2310/00155 : Gold or Au-based alloys
• CPC Class Codes: A61F 2310/00173 : Graphite
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: A61F 2310/00329 : Glasses, e.g. bioglass
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue
• CPC Class Codes: A61F 2310/00365 : Proteins; Polypeptides; Degradation products thereof
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61N 1/0551 : Spinal or peripheral nerve electrodes

Abstract

A spinal implant includes an implant body including a first endplate and a second endplate. A plurality of electrodes include at least one electrode disposed with the first endplate and at least one electrode disposed with the second endplate such that the electrodes conduct an electric current to stimulate tissue growth adjacent the implant body. Systems, surgical instruments and methods are disclosed.

Claims

1. A spinal implant comprising:

an implant body including a first endplate and a second endplate; and

a plurality of electrodes including at least one electrode disposed with the first endplate and at least one electrode disposed with the second endplate such that the electrodes conduct an electric current to stimulate tissue growth adjacent the implant body.

2. A spinal implant as recited in claim 1, wherein at least one of the electrodes comprises a titanium coating.

3. A spinal implant as recited in claim 1, wherein the first endplate comprises a titanium endcap anode attached with the implant body and the second endplate comprises a titanium endcap cathode attached with the implant body.

4. A spinal implant as recited in claim 1, wherein the at least one electrode of the first endplate comprises a frame mounted with the implant body.

5. A spinal implant as recited in claim 4, wherein the implant body includes an inner surface that defines a cavity, the frame including a first portion disposed with the first endplate and a second portion extending into the cavity.

6. A spinal implant as recited in claim 1, wherein the at least one electrode of the first endplate comprises a first frame attached with the implant body and the at least one electrode of the second endplate comprises a second frame attached with the implant body.

7. A spinal implant as recited in claim 6, wherein the first frame is electrically isolated from the second frame.

8. A spinal implant as recited in claim 1, wherein the first endplate comprises a superior surface and the at least one electrode of the first endplate comprises a titanium coated anode and the second endplate comprises an inferior surface and the at least one electrode of the second endplate comprises a titanium coated cathode.

9. A spinal implant as recited in claim 1, wherein the implant body includes an inner surface that defines a cavity configured for disposal of bone graft and the plurality of electrodes further include a plurality of spaced apart electrodes disposed with the inner surface to conduct an electric current to stimulate tissue growth adjacent the cavity.

10. A spinal implant as recited in claim 1, wherein the implant body defines a cavity and the electrodes are selectively configured with the implant body to generate an electric field adjacent the implant body to selectively stimulate tissue growth adjacent the implant body and within the cavity.

11. A spinal implant as recited in claim 1, wherein the electrodes are selectively configured with the implant body to generate an elliptical electric field adjacent the implant body to selectively stimulate tissue growth adjacent the implant body.

12. A spinal implant as recited in claim 1, wherein the plurality of electrodes comprise at least two anodes and at least two cathodes, which include the endplate electrodes, and are selectively configured with the implant body to generate an electric field adjacent the implant body to selectively stimulate tissue growth adjacent the implant body.

13. A spinal implant as recited in claim 1, wherein the implant body includes at least one diagnostic sensor.

14. A spinal implant as recited in claim 1, wherein the implant body includes at least one diagnostic sensor that detects impedance between the electrodes.

15. A spinal implant as recited in claim 1, wherein the implant body communicates with at least one remote power source.

16. A spinal implant as recited in claim 1, wherein the implant body includes an integrated circuit for communicating with at least one remote power source.

17. A spinal implant as recited in claim 1, further comprising a substrate including at least one electronic component that is electrically connected to one or more of the electrodes.

18. A spinal implant as recited in claim 1, wherein the implant body is molded with the plurality of electrodes.

19. A spinal implant comprising:

an interbody cage including a first surface, a second surface and an inner surface that defines a cavity configured for disposal of bone graft;

an anode including an endplate portion attached with the first surface and a flange portion extending into the cavity; and

a cathode including an endplate portion attached with the second surface and a flange portion extending into the cavity, the anode being electrically isolated from the cathode and disposed to conduct an electric current to stimulate tissue growth adjacent the interbody cage and within the cavity.

20. A spinal implant comprising:

an interbody cage including a first surface, a second surface and an inner surface that defines a cavity configured for disposal of bone graft;

a titanium endcap electrode connected with the first surface;

a titanium endcap electrode connected with the second surface; and

a substrate including at least one electronic component that is electrically connected to the electrodes, the electrodes conducting an electric current to stimulate tissue growth adjacent the interbody cage.