Spinal implant with improved surface properties for delivery

• US 20070208426A1
• Filed: 03/03/2006
• Published: 09/06/2007
• Est. Priority Date: 03/03/2006
• Status: Abandoned Application

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: SDGI Holdings Incorporated (Medtronic Plc)
• Inventors: Trieu, Hai
• Application Number:
  US11/368,126
• Publication Number:
  US 20070208426A1
• Time in Patent Office: Days
• US Class Current: 623/17.160
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/4425 made of articulated components
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30031 differing in wettability, e.g. in hydrophilic or hydrophobic behaviours
• CPC Class Codes: A61F 2002/30064 Coating or prosthesis-covering structure made of biodegradable material
• CPC Class Codes: A61F 2002/30069 elastomeric
• CPC Class Codes: A61F 2002/30075 swellable, e.g. when wetted
• CPC Class Codes: A61F 2002/30112 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• 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 2002/30884 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 2002/4627 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 2210/0061 swellable
• CPC Class Codes: A61F 2230/0004 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2250/0056 : differing in wettability, e.g. in hydrophilic or hydrophobic behaviours
• CPC Class Codes: A61F 2310/00011 : Metals or alloys
• CPC Class Codes: A61F 2310/00598 : Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF

Abstract

An intervertebral prosthetic disc is disclosed and can be installed within an intervertebral space between a superior vertebra and an inferior vertebra. The intervertebral prosthetic disc can include a superior component and an inferior component that can have an inferior bearing surface. A hydrophilicity of the inferior bearing surface can be greater-than an average hydrophilicity of the inferior component.

Claims

1. An intervertebral prosthetic disc configured to be installed within an intervertebral space between a superior vertebra and an inferior vertebra, the intervertebral prosthetic disc comprising:

a superior component; and

an inferior component having an inferior bearing surface, wherein a hydrophilicity of the inferior bearing suite is greater than an average hydrophilicity of the inferior component.

2. The intervertebral prosthetic disc of claim 1, wherein the inferior bearing surface is configured to decrease a coefficient of friction of the inferior bearing surface when exposed to a fluid.

3. The intervertebral prosthetic disc of claim 1, wherein the inferior component further comprises an inferior hydrophilic layer thereon.

4. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is substantially resorbable.

5. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is substantially non-resorbable.

6. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is temporary.

7. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is substantially permanent.

8. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is semi-permanent.

9. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer is detachable.

10. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer comprises a hydrophilic polymer.

11. The intervertebral prosthetic disc of claim 10, wherein the hydrophilic polymer comprises polyalkylene glycol, polymethacrylates, maleic anhydride/vinyl ether copolymer, starch, starch derivatives, gelatin, alginate, hydroxyethyl methacrylate, carrageenan, polyurethane, agar, carboxyvinyl copolymer, polyethylene oxide, polyhydroxyethyl methacrylate, polydioxolane, polyacryl acetate, polyvinyl chloride, hydroxypropylmethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose, carboxyethylcellulose, carboxy-methyl-hydroxyethyl cellulose, or a combination thereof

12. The intervertebral prosthetic disc of claim 3, wherein the inferior hydrophilic layer comprises a hydrogel.

13. The intervertebral prosthetic disc of claim 12, wherein the hydrogel comprises polyacrylamide, poly-N-isopropylacrylamine, polyvinyl methylether, polyvinyl alcohol, polyethyl hydroxyethyl cellulose, poly(2-ethyl)oxazoline, polyethyleneoxide, polyethylglycol, polyethylene glycol, polyacrylic acid, polyacrylonitrile, polyvinylacrylate, polyvinylpyrrolidone, or a combination thereof

14. The intervertebral prosthetic disc of claim 1, wherein the superior component includes a superior bearing surface having a hydrophilicity greater than an average hydrophilicity of the superior component.

15. The intervertebral prosthetic disc of claim 14, wherein the superior bearing surface is configured to decrease a coefficient of friction of the superior bearing surface when exposed to a fluid.

16. The intervertebral prosthetic disc of claim 14, wherein the superior component further comprises an superior hydrophilic layer thereon.

17. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is substantially resorbable.

18. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is substantially non-resorbable.

19. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is temporary.

20. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is substantially permanent.

21. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is semi-permanent.

22. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer is detachable.

23. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer comprises a hydrophilic polymer.

24. The intervertebral prosthetic disc of claim 16, wherein the hydrophilic polymer comprises polyalkylene glycol, polymethacrylates, maleic anhydride/vinyl ether copolymer, starch, starch derivatives, gelatin, alginate, hydroxyethyl methacrylate, carrageenan, polyurethane, agar, carboxyvinyl copolymer, polyethylene oxide, polyhydroxyethyl methacrylate, polydioxolane, polyacryl acetate, polyvinyl chloride, hydroxypropylmethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose, carboxyethylcellulose, carboxy-methyl-hydroxy-ethyl cellulose, or a combination thereof.

25. The intervertebral prosthetic disc of claim 16, wherein the superior hydrophilic layer comprises a hydrogel.

26. The intervertebral prosthetic disc of claim 25, wherein the hydrogel comprises polyacrylamide, poly-N-isopropylacrylamine, polyvinyl methylether, polyvinyl alcohol, polyethyl hydroxyethyl cellulose, poly(2-ethyl)oxazoline, polyethyleneoxide, polyethylglycol, polyethylene glycol, polyacrylic acid, polyacrylonitrile, polyvinylacrylate, polyvinylpyrrolidone, or a combination thereof.

27. A nucleus implant configured to be installed within an intervertebral space within an intervertebral disc comprising:

a load bearing elastic body movable between a folded configuration and a substantially straight configuration, wherein the load bearing elastic body has a core and an outer hydrophilic layer around the core.

28-39. -39. (canceled)

40. A method of installing a spinal implant having a hydrophilic surface, the method comprising,

exposing the hydrophilic surface to a fluid;

and

installing the spinal implant.

41-56. -56. (canceled)

57. An implant delivery device, comprising:

a housing having an outer structure and an inner hydrophilic layer thereon.

58-63. -63. (canceled)

64. A method of installing a spinal implant, the method comprising the steps of.

decreasing a coefficient of friction of the spinal implant;

and

installing the implant.

65-76. -76. (canceled)