METHOD OF PRODUCING AN IMPLANATABLE SPINAL SCREW AND CORRESPONDING SPINAL FIXATION SYSTEM

• US 20150297267A1
• Filed: 06/30/2015
• Published: 10/22/2015
• Est. Priority Date: 03/10/2010
• Status: Abandoned Application

• Current Assignee: CarboFix In Orthopedics LLC (CarboFix Orthopedics Ltd.)
• Original Assignee: CarboFix In Orthopedics LLC (CarboFix Orthopedics Ltd.)
• Inventors: GEPSTEIN, Reuven
• Application Number:
  US14/754,716
• Publication Number:
  US 20150297267A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/7002 Longitudinal elements, e.g. rods
• CPC Class Codes: A61B 17/7023 with a pivot joint
• CPC Class Codes: A61B 17/7031 made wholly or partly of flexible material
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7035 Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
• CPC Class Codes: A61B 17/7058 Plates mounted on top of bone anchor heads or shoulders
• CPC Class Codes: A61B 17/7059 Cortical plates A61B17/7007, A61B17/7058 take precedence
• CPC Class Codes: A61B 17/80 Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/866 Material or manufacture
• CPC Class Codes: A61B 17/8685 comprising multiple separate parts
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00964 composite
• CPC Class Codes: A61L 2430/38 for reconstruction of the spine, vertebrae or intervertebral discs
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/443 with carbon fillers
• CPC Class Codes: A61L 31/126 containing carbon fillers
• CPC Class Codes: C08L 71/00 Compositions of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06; Compositions of derivatives of such polymers

Abstract

A spinal implantable device may be produced from a composite material comprising a matrix including PEEK. The PEEK matrix may be reinforced with carbon fibers that amount to at least 60% of the composite material. The carbon fibers are arranged in a substantially parallel arrangement and compressed in a direction perpendicular to a longitudinal direction of the carbon fibers.

Claims

1. A method comprising:

producing an implantable spinal screw comprising a central shaft, a series of threads around the central shaft and a screw tip at an end of the central shaft, wherein the producing of the shaft, threads and tip is from composite material comprising a PEEK (polyether ether ketone) matrix reinforced with carbon fibers that amount to at least 60% of the composite material, and

coating the screw with titanium, wherein the coating includes the threads and the screw tip.

2. The method of claim 1, wherein the coating is carried out by laser welding of an outer coating layer made of titanium around the central shaft of the screw.

3. The method of claim 1, wherein the coating is carried out by:

producing a secondary screw of titanium outer shell, and

filling the outer shell with the reinforced PEEK matrix.

4. The method of claim 1, further comprising cannulating the screw to receive a guide-wire.

5. The method of claim 1, further comprising using at least two of the produced screws to fixate at least one rod or plate to at least two vertebrae.

6. The method of claim 5, wherein the at least one rod or plate comprises a cervical plate.

7. A spinal fixation system comprising at least one rod or plate and at least two screws, wherein at least one of the screws is produced by the method of claim 1, wherein the spinal fixation system is configured to be attached to at least two vertebra via the at least two screws.

8. The spinal fixation system of claim 7, wherein the at least two screws are produced by the method of claim 1.

9. The spinal fixation system of claim 7, wherein the at least two screws are intra-pedicular screws.

10. The spinal fixation system of claim 7, wherein the at least one rod or plate comprises a cervical plate.

11. A spinal fixation system comprising at least one rod or plate and at least two screws, wherein at least one of the screws is produced by the method of claim 4, wherein the spinal fixation system is configured to be attached to at least two vertebra via the at least two screws.

12. The spinal fixation system of claim 12, wherein the at least one rod or plate comprises a cervical plate.

13. A spinal fixation system comprising at least one rod or plate and at least two screws, wherein at least one of the screws comprises:

a central shaft, a series of threads around the central shaft and a screw tip at an end of the central shaft, wherein the shaft, threads and tip are made of composite material comprising a PEEK (polyether ether ketone) matrix reinforced with carbon fibers that amount to at least 60% of the composite material, and

a coating made of titanium, wherein said coating includes the threads and the screw tip;

wherein the spinal fixation system is configured to be attached to at least two vertebra via the at least two screws.

14. The spinal fixation system of claim 13, wherein the central shaft of at least one of the screws is cannulated by a hole through a center of the screw, along the longitudinal axis of the screw, and wherein the central longitudinal hole is configured to receive a guide-wire.

15. The spinal fixation system of claim 13, wherein the at least two screws are intra-pedicular screws.

16. The spinal fixation system of claim 13, wherein the at least one rod or plate comprises a cervical plate.