US 2020/0229943 A1 · BONE FIXATION AND FUSION DEVICE

Abstract

Disclosed is a bone fusion cage that contains bone graft and is implanted between bones in a skeletal system. The cage bears structural loads that are transmitted through the bones of the skeletal system and at least partially shields the contained bone graft from the structural loads. The cage is configured to provide a secondary load to the bone graft independent of the structural load to promote fusion of the bone graft to adjacent bones.

Claims31

Dependent claims

1-6. (canceled)

A method of using a fusion implant to reconstruct a defective portion within a spinal segment of a subject, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervening intervertebral disc space, and the defective portion extending from an inferior aspect of the superior vertebral bone to a superior aspect of the inferior vertebral bone and disrupting transmission of a vertical load along a longitudinal axis of the spinal segment, the method comprising:

coupling an implant placement assembly to a proximal side wall of the fusion implant, the fusion implant comprising:
(i) an upper abutment member configured to abut the inferior aspect of the superior vertebral and comprising a least one feature that is configured to increase fixation of the fusion implant onto bone, (ii) a lower abutment member configured to abut the superior surface of the inferior vertebral, the lower abutment member positioned a first distance from the upper abutment surface;
(iii) a distal side wall positioned opposite the proximal wall, the distal side wall and the proximal side wall being separated by a second distance when measured along a second axis;
(iv) an internal cavity positioned at least partially between the proximal side wall and the distal side wall;
and (v) a load member that is movable relative to the proximal side wall and configured to transition from a first position to a second position at least partially within the internal cavity;
placing a bone forming material within the internal cavity of the fusion implant;
positioning the fusion implant at least partially within the defective portion, such that the upper abutment member of the fusion implant abuts the inferior aspect of the superior vertebral bone and the lower abutment member of the fusion implant abuts the superior aspect of the inferior vertebral bone, the positioning causing at least a portion of the vertical load to be transmitted through the fusion implant;
and
using a displacement instrument to transition the load member from the first position to the second position;
wherein the transitioning the load member from the first position to the second position causes at least:
(i) a decrease of a distance between the load member and the distal side wall along the direction of the second axis while the first distance and the second distance remain unchanged, and (ii) the load member to apply a compressive force onto the bone forming material contained in the internal cavity.

8 more elements

A method of using a fusion implant to reconstruct a defective portion within a spinal segment of a subject, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervening intervertebral disc space, wherein the defective portion extends from an inferior aspect of the superior vertebral bone to a superior aspect of the inferior vertebral bone and disrupts transmission of a vertical load along a longitudinal axis of the spinal segment, the method comprising:

coupling an implant placement assembly to the fusion implant, the fusion implant comprising:
(i) an upper abutment member configured to abut the inferior aspect of the superior vertebral and comprising a least one feature configured to increase fixation of the upper abutment member onto bone, (ii) a lower abutment member configured to abut the superior surface of the inferior vertebral and positioned a first distance from the upper abutment surface;
(iii) a distal side wall positioned opposite a proximal side wall, the distal side wall and the proximal side wall being separated by a second distance when measured along a second axis;
(iv) an internal cavity positioned at least partially between the proximal side wall and the distal side wall;
and (v) a load member configured to transition from a first position to a second position at least partially within the internal cavity;
inserting a bone forming material within the internal cavity of the fusion implant;
positioning the fusion implant at least partially within the defective portion, such that the upper abutment member of the fusion implant abuts the inferior aspect of the superior vertebral bone and the lower abutment member of the fusion implant abuts the superior aspect of the inferior vertebral bone, the positioning causing at least a portion of the vertical load to be transmitted through the fusion implant;
and
using at least the displacement instrument, transitioning the load member from the first position to the second position while the implant placement assembly is coupled to the fusion implant;
wherein the act of transitioning the load member from the first position to the second position:
(i) decreases a distance between the load member and the distal side wall of the fusion implant along the second axis while the first distance and the second distance remain unchanged, and (ii) causes the load member to apply a compressive force onto the bone forming material contained in the internal cavity.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/678,922Filed 8 Nov 2019

Priority

23 Aug 2004

Published

23 Jul 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification38 codes

A61F 2/4455
For the spine, e.g. vertebrae or spinal discs: for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion…
A61F 2/44
Joints: for the spine, e.g. vertebrae or spinal discs
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient
A61F 2/447
For the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages: substantially parallelepipedal, e.g.…

Family

Application60/603,809Us provisional application · filed 23 Aug 2004

Application60/670,898Us provisional application · filed 8 Apr 2005

Application60/670,899Us provisional application · filed 8 Apr 2005

Application60/670,900Us provisional application · filed 8 Apr 2005

Application11/211,160Continuation · filed 23 Aug 2005

Application12/651,908Continuation · filed 4 Jan 2010

Application14/746,528Continuation · filed 22 Jun 2015

Application16/678,922Continuation

US 10,470,892 B2Related patent

US 2006/0074488 A1Published application

US 2010/0106250 A1Published application

US 2015/0289989 A1Published application

US 7,641,690 B2Related patent

US 9,060,873 B2Related patent

US 2020/0229943 A1This patent

From the US filing history. Foreign family members aren’t listed.

Abstract

Claims31

Dependent claims

1-6. (canceled)

coupling an implant placement assembly to a proximal side wall of the fusion implant, the fusion implant comprising:
(i) an upper abutment member configured to abut the inferior aspect of the superior vertebral and comprising a least one feature that is configured to increase fixation of the fusion implant onto bone, (ii) a lower abutment member configured to abut the superior surface of the inferior vertebral, the lower abutment member positioned a first distance from the upper abutment surface;
(iii) a distal side wall positioned opposite the proximal wall, the distal side wall and the proximal side wall being separated by a second distance when measured along a second axis;
(iv) an internal cavity positioned at least partially between the proximal side wall and the distal side wall;
and (v) a load member that is movable relative to the proximal side wall and configured to transition from a first position to a second position at least partially within the internal cavity;
placing a bone forming material within the internal cavity of the fusion implant;
positioning the fusion implant at least partially within the defective portion, such that the upper abutment member of the fusion implant abuts the inferior aspect of the superior vertebral bone and the lower abutment member of the fusion implant abuts the superior aspect of the inferior vertebral bone, the positioning causing at least a portion of the vertical load to be transmitted through the fusion implant;
and
using a displacement instrument to transition the load member from the first position to the second position;
wherein the transitioning the load member from the first position to the second position causes at least:
(i) a decrease of a distance between the load member and the distal side wall along the direction of the second axis while the first distance and the second distance remain unchanged, and (ii) the load member to apply a compressive force onto the bone forming material contained in the internal cavity.

8 more elements

A method of using a fusion implant to reconstruct a defective portion within a spinal segment of a subject, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervening intervertebral disc space, wherein the defective portion extends from an inferior aspect of the superior vertebral bone to a superior aspect of the inferior vertebral bone and disrupts transmission of a vertical load along a longitudinal axis of the spinal segment, the method comprising:

coupling an implant placement assembly to the fusion implant, the fusion implant comprising:
(i) an upper abutment member configured to abut the inferior aspect of the superior vertebral and comprising a least one feature configured to increase fixation of the upper abutment member onto bone, (ii) a lower abutment member configured to abut the superior surface of the inferior vertebral and positioned a first distance from the upper abutment surface;
(iii) a distal side wall positioned opposite a proximal side wall, the distal side wall and the proximal side wall being separated by a second distance when measured along a second axis;
(iv) an internal cavity positioned at least partially between the proximal side wall and the distal side wall;
and (v) a load member configured to transition from a first position to a second position at least partially within the internal cavity;
inserting a bone forming material within the internal cavity of the fusion implant;
positioning the fusion implant at least partially within the defective portion, such that the upper abutment member of the fusion implant abuts the inferior aspect of the superior vertebral bone and the lower abutment member of the fusion implant abuts the superior aspect of the inferior vertebral bone, the positioning causing at least a portion of the vertical load to be transmitted through the fusion implant;
and
using at least the displacement instrument, transitioning the load member from the first position to the second position while the implant placement assembly is coupled to the fusion implant;
wherein the act of transitioning the load member from the first position to the second position:
(i) decreases a distance between the load member and the distal side wall of the fusion implant along the second axis while the first distance and the second distance remain unchanged, and (ii) causes the load member to apply a compressive force onto the bone forming material contained in the internal cavity.

8 more elements

Dependencies are inferred from the claim text.

Bone fixation and fusion device

Life of this patent

Abstract

Claims31

Bone fixation and fusion device

Life of this patent

Abstract

Claims31