Composite Metal and Bone Orthopedic Fixation Devices

Patent metadata

Field	Value
Publication number	US-2016000489-A1
Application number	US-201514854387-A
Country	US
Kind code	A1
Filing date	Sep 15, 2015
Priority date	Jun 15, 2012
Publication date	Jan 7, 2016
Grant date	—

Abstract

Composite orthopedic devices that facilitate spine stabilization, such as: bone screws, rods, plates, interbodies, and corpectomy cages are disclosed. They are designed to provide both strength and load carrying capabilities, while increasing bio-integration of the devices with the surrounding bone tissue. They are constructed of composite layers of allograft and/or autograft bone and a structural material, such as titanium alloy or carbon/graphite fiber composite. Cannulations within the device are loaded with a mixture of stem cells, particles of allograft and/or autograft bone, and bone growth factors, such as BMP-2. The cannulations are connected to the surface of the device via multiple fenestrations that provide pathways to supply the bone/stem cell mixture to the surface, allowing living bone tissue to grow and insure bio-integration. The devices can also have radiofrequency (RF) stimulation implantation within the structure of the implanted device, capable of responding to external RF stimulation of enhanced bone growth.

First claim

1 - 11 . (canceled)

12 . A composite orthopedic rod for use in a surgical procedure comprising a shaft having a first end and a second end wherein the shaft defines a cannulation extending along at least a portion of the length of the shaft;
wherein the cannulated portion of the shaft contains at least one fenestration, wherein the rod is constructed of a material comprising allograft and/or autograft bone and a metal or metal alloy.

13 . The rod according to claim 15 , wherein the rod is constructed of a material comprising a core and two layers; wherein the core is allograft and/or autograft bone, the middle layer is a metal or metal alloy, and the outermost layer is allograft and/or autograft bone.

14 . The rod according to claim 15 , wherein the rod is constructed of a material comprising about 50% allograft and/or autograft bone and about 50% metal or metal alloy.

15 . The rod according to claim 15 , wherein the metal or metal alloy is selected from the group consisting of titanium, cobalt-chromium, niobium alloy, and tantalum alloy.

16 . The rod according to claim 15 , wherein the rod is coated with an antibiotic solution.

17 . The rod according to claim 15 , wherein the cannulated portion of the shaft is filled with stem cells and allograft and/or autograft bone.

18 . The rod according to claim 15 , wherein the titanium or metal products is replaced with carbon fiber product in exact ratio as described above with the titanium embodiment.

19 . The rod according to claim 15 , further comprising radiofrequency stimulation implantation within the structure of the rod, capable of responding to external stimulation.

20 . A composite orthopedic rod for use in a surgical procedure comprising a shaft having a first end and a second end wherein the shaft defines a cannulation extending along at least a portion of the length of the shaft;
wherein the cannulated portion of the shaft contains at least one fenestration; and wherein the rod is constructed entirely of a carbon or graphite fiber reinforced composite material that essentially contains no metal or metal alloy.

Assignees

• Stc Unm

Inventors

• Kaloostian Paul E

Classifications

• A61B17/864 Primary

  hollow, e.g. with socket or cannulated · CPC title

• A61B17/866

  Material or manufacture · CPC title

• A61B17/7035

  Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other · CPC title

• A61B17/8625

  Shanks, i.e. parts contacting bone tissue · CPC title

• A61B17/8615

  at the central region of the screw head · CPC title