Spinal implant system and method

• US 10,123,882 B2
• Filed: 07/06/2015
• Issued: 11/13/2018
• Est. Priority Date: 07/06/2015
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Stevenson, Tyler S., Benson, Nicholas M., Brown, Richard L., Bontemps, Calvert S., Metcalf, Newton H., Tyler, Larry, Foley, Kevin T., Henschel, Mark E., Barror, Michael W.
• Primary Examiner(s): Chang, Olivia C
• Application Number:
  US14/792,256
• Publication Number:
  US 20170007420A1
• Time in Patent Office: 1,226 Days
• 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 the first endplate including a vertebral engaging surface defining a first electrode, the second endplate including a vertebral engaging surface defining a second electrode, the first and second electrodes being configured to conduct an electric current to stimulate tissue growth adjacent the implant body, a distance between the vertebral engaging surfaces defining a maximum height of the implant body,

wherein the first electrode comprises a titanium coated anode and the second electrode comprises a titanium coated cathode.

2. 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.

3. 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.

4. A spinal implant as recited in claim 1, wherein the first electrode comprises at least two anodes and the second electrode comprises at least two cathodes, the electrodes being selectively configured with the implant body to generate an electric field adjacent the implant body to selectively stimulate tissue growth adjacent the implant body.

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

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

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

8. A spinal implant as recited in claim 7, wherein the implant body includes an integrated circuit for communicating with the at least one remote power source.

9. 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 first and second electrodes.

10. A spinal implant as recited in claim 1, wherein the implant body is molded with the first and second electrodes.

11. A spinal implant as recited in claim 1, wherein the vertebral engaging surfaces each include a plurality of teeth.

12. A spinal implant as recited in claim 1, further comprising a printed circuit board assembly positioned between the endplates.

13. A spinal implant as recited in claim 12, wherein the printed circuit board assembly comprises a power harvesting integrated circuit that enables the implant body to establish radio communication at a short distance to supply power to charge the printed circuit board assembly.

14. A spinal implant as recited in claim 12, wherein the printed circuit board assembly comprises an antenna configured to convert magnetic fields into energy such that the endplates conduct electric current to selectively stimulate tissue growth adjacent the implant body.

15. 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, the first surface defining a titanium coated anode, the second surface defining a titanium coated cathode, a distance between the surfaces defining a maximum height of the interbody cage; and

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

16. A spinal implant comprising:

an implant body including a first end having a blunt tip and an opposite second end defining a cavity configured for engagement with a surgical instrument, the implant body including opposite top and bottom surfaces and a printed circuit board assembly positioned between the top and bottom surfaces, the cavity being positioned between the top and bottom surfaces;

a first endplate positioned in a recess of the top surface and including a vertebral engaging surface defining a first electrode; and

a second endplate positioned in a recess of the bottom surface such that the second endplate is spaced apart from the first endplate by the implant body, the second endplate including a vertebral engaging surface defining a second electrode, the first and second electrodes being configured to conduct an electric current to stimulate tissue growth adjacent the implant body,

wherein the spinal implant comprises an opening configured for disposal of an agent, the opening extending continuously through the implant body and the endplates.

17. A spinal implant as recited in claim 16, wherein the printed circuit board assembly comprises:

a power harvesting integrated circuit that enables the implant body to establish radio communication at a short distance to supply power to charge the printed circuit board assembly; and

an antenna configured to convert magnetic fields into energy such that the endplates conduct electric current to selectively stimulate tissue growth adjacent the implant body.