Interbody Fusion Implant and Related Methods

Patent metadata

Field	Value
Publication number	US-2016158024-A1
Application number	US-201514962848-A
Country	US
Kind code	A1
Filing date	Dec 8, 2015
Priority date	Jul 12, 2009
Publication date	Jun 9, 2016
Grant date	—

Abstract

An implant for spinal fusion includes a base member, a closure member, pins, and recesses. The base member includes a U-shaped configuration with an open end defined by first and second free ends of first and second side walls extending away from an end wall. The closure member is configured to form an enclosed interior when coupled with the base member. The closure member includes first and second overlapping portions configured to engage the first and second free ends. First and second pins are embedded in a respective one of the first and second free ends. First and second recesses are formed in a respective one of the first and second overlapping portions. The pins cooperate with the recesses to align and frictionally couple the base member with the closure member.

First claim

What is claimed is:

1 . An implant for spinal fusion, comprising:
a base member having a U-shaped configuration with a first side wall, a second side wall and an end wall together forming an interior, the first and second side wall having respective free ends, the base member configured to engage end plates of adjacent vertebral bodies while serving as a protective barrier between the interior and adjacent neural or vascular structure after positioning between the adjacent vertebral bodies; a closure member configured for assembly onto the free ends of the first and second side walls to enclose the interior, the closure member having first and second overlapping portions located adjacent the free end of each respective first and second side wall, the closure member configured to engage the end plates of the adjacent vertebral bodies after assembly with the base member; a first elongated tie and a second elongated tie, each having a first embedded portion terminating at a first terminal end and a second projecting portion that includes a second terminal end located opposite the first terminal end, each first embedded portion being received in and affixed to the respective side wall and with the respective projecting portion projecting away from the free end of the respective side wall, the projecting portion including an end portion no wider than the rest of the projecting portion; and a first elongated bore and a second elongated bore in the closure member, each bore having a mouth defined at the respective first and second overlapping portion that is dimensioned to receive the respective projecting portion and including an interior surface configured to frictionally engage the respective projecting portion of a respective elongated tie.

2 . The implant of claim 1 , wherein the first elongated tie and the second elongated tie are pins.

3 . The implant of claim 1 , wherein the closure member includes a portion that abuts the sidewalls and a portion that is receivable in the interior of the base member.

4 . The implant of claim 1 , wherein the elongated ties are comprised of a radiopaque material and the base member and the closure member are comprised of a radiolucent material.

5 . The implant of claim 4 , wherein the elongated ties are metallic.

6 . The implant of claim 5 , wherein the radiolucent material is PEEK.

7 . An implant for spinal fusion, comprising:
a base member having a U-shaped configuration with an open end defined by first and second free ends of first and second side walls extending away from an end wall; a closure member configured to form an enclosed interior when coupled with the base member, the closure member including first and second overlapping portions configured to engage the first and second free ends; first and second pins, each embedded in a respective one of the first and second free ends; and first and second recesses, each formed in a respective one of the first and second overlapping portions; wherein the first and second pins cooperate with the first and second recesses to align and frictionally couple the base member with the closure member.

8 . The implant of claim 7 , further comprising serrations on at least one of the first and second pins for engagement with a respective one of the first and second recesses.

9 . The implant of claim 7 , wherein the first and second side walls are integrally coupled with the end wall to form an open interior, at least a portion of the end wall dimensioned to serve as a structural support between cortical bone regions of adjacent vertebral bodies in the lumbar or thoracic spine, and the first and second side walls and the end wall are configured to serve as a protective barrier between the open interior and adjacent neural structure and/or vasculature.

10 . The implant of claim 9 , wherein the first and second side walls and the end wall define unobstructed areas on the adjacent vertebral bodies beginning from the open end for end plate preparation after the base member is positioned between the adjacent vertebral bodies.

11 . The implant of claim 7 , wherein the closure member is configured to form the enclosed interior after the base member has been positioned in a preliminarily prepared disc space in between the vertebral bodies and end plate preparation has taken place within the interior of the base member.

12 . The implant of claim 11 , wherein the closure member is dimensioned to make contact with the vertebral bodies after being coupled to the base member to provide partial structural support between cortical bone regions of the adjacent vertebral bodies.

13 . The implant of claim 7 , wherein each of the first and second pins includes a first embedded portion terminating at a first terminal end thereof and a second projecting portion that includes a second terminal end thereof located opposite the first terminal end, each first embedded portion being received in and affixed to one of the side walls with its projecting portion projecting away from a respective second end, the projecting portion including an end portion, which includes the second terminal end, the end portion being no wider than the rest of the projecting portion.

14 . The implant of claim 13 , wherein each of the first and second recesses includes a mouth defined at a respective overlapping portion dimensioned to receive a respective projecting portion, and each recess having an interior dimensioned to have at least a portion of an interior surface thereof frictionally engage a respective projecting portion of a respective pin.

15 . An implant for spinal fusion, comprising:
a base member having a U-shaped configuration with an open end defined by first and second free ends of first and second side walls extending away from an end wall; a closure member configured to form an enclosed interior when coupled with the base member, the closure member including first and second overlapping portions configured to engage the first and second free ends; first and second pins, each embedded in a respective one of the first and second overlapping portions; and first and second recesses, each formed in a respective one of the first and second pins; wherein the first and second pins cooperate with the first and second recesses to align and frictionally couple the base member with the closure member.

16 . The implant of claim 15 , further comprising serrations on at least one of the first and second pins for engagement with a respective one of the first and second recesses.

17 . The implant of claim 15 , wherein the first and second side walls are integrally coupled with the end wall to form an open interior, at least a portion of the end wall dimensioned to serve as a structural support between cortical bone regions of adjacent vertebral bodies in the lumbar or thoracic spine, and the first and second side walls and the end wall are configured to serve as a protective barrier between the open interior and adjacent neural structure and/or vasculature.

18 . The implant of claim 17 , wherein the first and second side walls and the end wall define unobstructed areas on the adjacent vertebral bodies beginning from the open end for end plate preparation after the base member is positioned between the adjacent vertebral bodies.

19 . The implant of claim 15 , wherein each of the first and second pins includes a first embedded portion terminating at a first terminal end thereof and a second projecting portion that includes a second terminal end thereof located opposite the fi

Assignees

• Alphatec Spine Inc

Inventors

• Etminan Mohammad

Classifications

• A61F2002/30604

  modular · CPC title

• A61F2002/30507

  using a threaded locking member, e.g. a locking screw or a set screw · CPC title

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title

• A61F2/447 Primary

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2002/2817

  Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF] · CPC title