# US 11,896,495 B2 · Expandable interbody devices and related instruments and methods for spinal fusion surgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,495 B2 - Document ID: US11896495B2 - Status: Granted - Kind: B2 - Application number: 17/509,843 - Filed: 2021-10-25 - Published: 2022-10-13 - Granted: 2024-02-13 - Earliest claimed: 2015-12-21 - Assignees: Southern Spine, LLC - Applicants: Southern Spine, LLC - Inventors: David C. Field; Mitchell Blenden; Hugh F. Smisson, III - Web page: https://patentgrep.com/patent/US11896495B2 ## CPC - A61F 2/4455: {for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs A61F2/442)} - 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)} - A61F 2/4611: {of spinal prostheses} - A61F 2/4603: {for insertion or extraction of endoprosthetic joints or of accessories thereof} - A61F 2002/30024: {differing in coefficient of friction} - A61F 2002/30126: {oval-O-shaped} - A61F 2002/30321: {differing in roughness} - A61F 2002/30471: {connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type} - A61F 2002/30538: {for adjusting angular orientation} - A61F 2002/30545: {for adjusting a diameter} - A61F 2002/3055: {for adjusting length} - A61F 2002/30555: {along two perpendicular axes} - A61F 2002/30579: {with mechanically expandable devices, e.g. fixation devices} - A61F 2002/30624: {Hinged joint, e.g. with transverse axle restricting the movement} - A61F 2002/30904: {serrated profile, i.e. saw-toothed} - 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} - A61F 2002/4629: {connected to the endoprosthesis or implant via a threaded connection} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract An interbody device may include a main body and an arm movably connected thereto. The device may have a first end, a second end opposite the first end in a direction of a longitudinal axis of the device, a first side, a second side opposite the first side in a direction of a first transverse axis of the device, a third side, and a fourth side opposite the third side in a direction of a second transverse axis of the device. An overall distance between the first side and the second side may increase along at least a majority of a length of the device in a direction from the first end toward the second end, and an overall distance between the third side and the fourth side may increase along at least a majority of the length in a direction from the second end toward the first end. ## Claims ### Claim 1 An interbody device for implantation within an intervertebral space between a first vertebra and a second vertebra, the interbody device comprising: a main body having an elongated shape; and an arm movably connected to the main body and having an elongated shape; wherein the interbody device has a first end, a second end disposed opposite the first end of the interbody device in a direction of a longitudinal axis of the interbody device, a first side, a second side disposed opposite the first side of the interbody device in a direction of a first transverse axis of the interbody device, a third side, and a fourth side disposed opposite the third side of the interbody device in a direction of a second transverse axis of the interbody device; wherein the first transverse axis of the interbody device is perpendicular to the longitudinal axis of the interbody device; wherein the second transverse axis of the interbody device is perpendicular to each of the longitudinal axis and the first transverse axis of the interbody device; wherein the interbody device has a first overall distance between the first side and the second side at the first end of the interbody device; wherein the interbody device has a second overall distance between the first side and the second side at the second end of the interbody device; wherein the interbody device has a third overall distance between the third side and the fourth side at the first end of the interbody device; wherein the interbody device has a fourth overall distance between the third side and the fourth side at the second end of the interbody device; wherein the first overall distance is less than the second overall distance; and wherein the third overall distance is less than the fourth overall distance. ### Claim 2 (depends on 1) The interbody device of claim 1, wherein the arm is movable with respect to the main body from a compact position to an expanded position. ### Claim 3 (depends on 1) The interbody device of claim 1, wherein the arm is pivotally connected to the main body via a hinge connection, and wherein the arm is pivotable with respect to the main body from a compact position to an expanded position. ### Claim 4 (depends on 3) The interbody device of claim 3, wherein the hinge connection comprises a hinge recess and a hinge tab, wherein the hinge recess and the hinge tab are in operational communication. ### Claim 5 (depends on 4) The interbody device of claim 4, wherein the main body further comprises a port and an internal cavity in communication with the port. ### Claim 6 (depends on 5) The interbody device of claim 5, wherein at least a portion of the hinge connection is disposed within the internal cavity. ### Claim 7 (depends on 5) The interbody device of claim 5, wherein the internal cavity is configured to be filled with a bone graft or a bone graft substitute. ### Claim 8 (depends on 3) The interbody device of claim 3, wherein the main body is configured to interlock with the arm, wherein the main body and the arm are interlocked when the arm is in the compact position, and wherein main body and the arm are not interlocked when the arm is in the expanded position. ### Claim 9 (depends on 3) The interbody device of claim 3, wherein the hinge connection defines a pivot axis, and wherein the pivot axis is parallel to the second transverse axis of the interbody device. ### Claim 10 (depends on 1) The interbody device of claim 1, wherein the interbody device comprises: a first edge positioned along an interface of the first side and the second side at the first end of the interbody device and having a first radius of curvature, a second edge positioned along an interface of the first side and the second side at the second end of the interbody device and having a second radius of curvature, a third edge positioned along an interface of the third side and the fourth side at the first end of the interbody device and having a third radius of curvature, and a fourth edge positioned along an interface of the third side and the fourth side of the interbody device and having a fourth radius of curvature; wherein the first radius of curvature is less than the second radius of curvature, and wherein the third radius of curvature is less than the fourth radius of curvature. ### Claim 11 (depends on 1) The interbody device of claim 1, wherein the main body comprises at least a first plurality of teeth and the arm comprises at least a second plurality of teeth. ### Claim 12 (depends on 11) The interbody device of claim 11, wherein each of the first plurality of teeth and the second plurality of teeth are configured to engage with the adjacent vertebrae to prevent migration of the interbody device. ### Claim 13 An interbody device for implantation within an intervertebral space between a first vertebra and a second vertebra, the interbody device comprising: a main body having an elongated shape; and an arm movably connected to the main body and having an elongated shape; wherein the interbody device has a first end, a second end disposed opposite the first end of the interbody device in a direction of a longitudinal axis of the interbody device, a first side, a second side disposed opposite the first side of the interbody device in a direction of a first transverse axis of the interbody device, a third side, and a fourth side disposed opposite the third side of the interbody device in a direction of a second transverse axis of the interbody device; wherein the first transverse axis of the interbody device is perpendicular to the longitudinal axis of the interbody device; wherein the second transverse axis of the interbody device is perpendicular to each of the longitudinal axis and the first transverse axis of the interbody device; wherein the interbody device has a first overall distance between the first side and the second side at the first end of the interbody device wherein the interbody device has a second overall distance between the first side and the second side at the second end of the interbody device; wherein the first overall distance is less than the second overall distance; wherein the main body has a first side, a second side disposed opposite the first side of the main body in the direction of the first transverse axis of the interbody device, a third side, and a fourth side disposed opposite the third side of the main body in the direction of the second transverse axis; wherein the distance between the third side and fourth side of the main body defines a third overall distance; wherein the arm has a first side, a second side disposed opposite the first side of the arm in the direction of the first transverse axis of the interbody device, a third side, and a fourth side disposed opposite the third side of the arm in the direction of the second transverse axis; wherein the distance between the third side and the fourth side of the arm defines a fourth overall distance; and wherein the third overall distance and the fourth overall distance are substantially equal. ### Claim 14 (depends on 13) The interbody device of claim 13, wherein the arm is movable with respect to the main body from a compact position to an expanded position. ### Claim 15 (depends on 13) The interbody device of claim 13, wherein the arm is pivotally connected to the main body via a hinge connection, and wherein the arm is pivotable with respect to the main body from a compact position to an expanded position. ### Claim 16 (depends on 15) The interbody device of claim 15, wherein the hinge connection defines a pivot axis, and wherein the pivot axis is parallel to the second transverse axis of the interbody device. ### Claim 17 An interbody device for implantation within an intervertebral space between a first vertebra and a second vertebra, the interbody device comprising: a main body having an elongated shape; and an arm movably connected to the main body and having an elongated shape; wherein the interbody device has a first end, a second end disposed opposite the first end of the interbody device in a direction of a longitudinal axis of the interbody device, a first side, a second side disposed opposite the first side of the interbody device in a direction of a first transverse axis of the interbody device, a third side, and a fourth side disposed opposite the third side of the interbody device in a direction of a second transverse axis of the interbody device; wherein the first transverse axis of the interbody device is perpendicular to the longitudinal axis of the interbody device; wherein the second transverse axis of the interbody device is perpendicular to each of the longitudinal axis and the first transverse axis of the interbody device; wherein the interbody device comprises: a first edge positioned along an interface of the first side and the second side at the first end of the interbody device and having a first radius of curvature, a second edge positioned along an interface of the first side and the second side at the second end of the interbody device and having a second radius of curvature, a third edge positioned along an interface between the third side and the fourth side at the first end of the interbody device and having a third radius of curvature, and a fourth edge positioned along an interface between the third side and the fourth side at the second end of the interbody device and having a fourth radius of curvature; wherein the first radius of curvature is less than the second radius of curvature; and wherein the third radius of curvature is less than the fourth radius of curvature. ### Claim 18 (depends on 17) The interbody device of claim 17, wherein the arm is movable with respect to the main body from a compact position to an expanded position. ### Claim 19 (depends on 17) The interbody device of claim 17, wherein the arm is pivotally connected to the main body via a hinge connection, and wherein the arm is pivotable with respect to the main body from a compact position to an expanded position. ### Claim 20 (depends on 19) The interbody device of claim 19, wherein the hinge connection defines a pivot axis, and wherein the pivot axis is parallel to the second transverse axis of the interbody device.