# US 12,109,123 B2 · Intervertebral fusion cage > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,123 B2 - Document ID: US12109123B2 - Status: Granted - Kind: B2 - Application number: 17/765,126 - Filed: 2020-09-29 - Published: 2022-12-15 - Granted: 2024-10-08 - Earliest claimed: 2019-09-30 - Assignees: Cg Bio Co., Ltd.; Seoul National University Hospital - Applicants: Cg Bio Co., Ltd.; Seoul National University Hospital - Inventors: Ui Su Jung; Seung Jae Hyun - Web page: https://patentgrep.com/patent/US12109123B2 ## 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 2/447: {substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section} - A61F 2/4601: {for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity} - A61F 2/4611: {of spinal prostheses} - A61F 2002/30383: {made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove} - A61F 2002/3039: {with possibility of relative movement of the rib within the groove} - A61F 2002/30433: {using additional screws, bolts, dowels, rivets or washers e.g. connecting screws} - A61F 2002/30518: {with possibility of relative movement between the prosthetic parts} - A61F 2002/30537: {adjustable} - A61F 2002/30556: {for adjusting thickness} - A61F 2002/30579: {with mechanically expandable devices, e.g. fixation devices} - A61F 2002/30593: {hollow} - A61F 2002/4622: {having the shape of a forceps or a clamp} - 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 2002/4638: {Tools for performing screwing, e.g. nut or screwdrivers, or particular adaptations therefor} - 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 intervertebral fusion cage is disclosed. An intervertebral fusion cage according to an embodiment of the present invention comprises: a body including a receiving part of which upper and lower portions are open, an upper guide part, and a lower guide part; a moving member disposed in the receiving part; a screw which is screw-coupled to the body and moves forwards or backwards relative to the body integrally with the moving member when rotating; an upper plate which has a guided part guided by the upper guide part and is disposed above the body while being engaged with the moving member; and a lower plate which has a guided part guided by the lower guide part and is disposed under the body while being engaged with the moving member. ## Claims ### Claim 1 An intervertebral fusion cage, comprising: a body comprising a receiving part of which upper and lower portions have an opening, an upper guide part, and a lower guide part; a moving member disposed in the receiving part; a screw which is screw-coupled to the body and moves forwards or backwards relative to the body integrally with the moving member when rotating; an upper plate which has a guided part guided by the upper guide part and is disposed above the body while being engaged with the moving member; and a lower plate which has a guided part guided by the lower guide part and is disposed under the body while being engaged with the moving member, wherein the body further comprises a screw hole formed in a front of the body, and the screw comprises a head part rotatably coupled to the moving member and a screw thread part screwed to the screw hole, and wherein the moving member comprises a screw coupling hole formed so that the head part penetrates and is coupled to a front side of the moving member. ### Claim 2 (depends on 1) The intervertebral fusion cage of claim 1, wherein when the screw is rotated in one direction while the upper plate and the lower plate are fixed between the human body's vertebral bodies, as the body moves forward by the screw and the moving member, the upper plate moves upward along the upper guide part and the lower plate moves downward along the lower guide part. ### Claim 3 (depends on 1) The intervertebral fusion cage of claim 1, wherein the upper guide part is formed in a downwardly inclined form from a rear to a front in the upper portion of the body, and the lower guide part is formed in an upwardly inclined form from a rear to a front in the lower portion of the body. ### Claim 4 (depends on 1) The intervertebral fusion cage of claim 1, wherein the body further comprises a rear hole formed through a rear sidewall in communication with the receiving part, and the moving member further comprises a guide hole formed through the rear sidewall so that a screw rotation tool passing through the rear hole can enter the head part. ### Claim 5 (depends on 4) The intervertebral fusion cage of claim 4, wherein the rear hole provides a coupling interface of a surgical tool for insertion of the intervertebral fusion cage into the human body. ### Claim 6 (depends on 1) The intervertebral fusion cage of claim 1, wherein the moving member comprises grooves formed in a vertical direction on opposite sidewalls, respectively, and the upper plate and the lower plate each comprise a protrusion inserted into the groove, respectively. ### Claim 7 (depends on 1) The intervertebral fusion cage of claim 1, wherein the upper guide part and the lower guide part are formed on opposite sides of the body, respectively. ### Claim 8 (depends on 1) The intervertebral fusion cage of claim 1, wherein the upper plate and the lower plate each comprise front inclined parts formed to protrude forward from one side to the other side at a front. ### Claim 9 (depends on 8) The intervertebral fusion cage of claim 8, wherein the upper plate and the lower plate are formed vertically symmetrical. ### Claim 10 (depends on 9) The intervertebral fusion cage of claim 9, wherein the upper plate and the lower plate comprise a keel part formed parallel to the front inclined part at the upper portion and the lower portion, respectively. ### Claim 11 (depends on 1) The intervertebral fusion cage of claim 1, wherein the upper plate and the lower plate comprise window parts, respectively, penetrated in the vertical direction. ### Claim 12 (depends on 11) The intervertebral fusion cage of claim 11, wherein the body is formed to be surrounded on all sides by sidewalls and open up and down.