US 12,433,760 B2
Variable vertebral cage
Kyung Hak Kim, Gyeonggi-do (KR); and Gil Sam Lee, Gyeonggi-do (KR)
Assigned to Endac co., Ltd, Gyeonggi-do (KR)
Appl. No. 17/754,684
Filed by ENDAC CO., LTD., Gyeonggi-do (KR)
PCT Filed Sep. 1, 2020, PCT No. PCT/KR2020/011697
§ 371(c)(1), (2) Date Apr. 8, 2022,
PCT Pub. No. WO2021/071091, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 10-2019-0126388 (KR), filed on Oct. 11, 2019.
Prior Publication US 2022/0409392 A1, Dec. 29, 2022
Int. Cl. A61F 2/44 (2006.01); A61B 17/70 (2006.01); A61F 2/30 (2006.01); A61F 2/28 (2006.01)
CPC A61F 2/4455 (2013.01) [A61B 17/7094 (2013.01); A61F 2/30767 (2013.01); A61F 2002/2835 (2013.01); A61F 2002/30579 (2013.01); A61F 2002/30904 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A variable vertebral cage comprising:
a shaft having two thread portions threaded in opposite directions on both sides and a non-threaded portion in a middle between the two thread portions on a longitudinal surface thereof;
two wedge blocks provided on one end and the other end of the shaft, respectively, and configured to be moved toward and away from each other by rotation of the shaft; and
movable blocks configured to be coupled to at least one wedge block of the two wedge blocks to define a variable space to be filled with bone powder, and provided above and below the at least one wedge block, respectively, to be moved by a movement of the at least one wedge block,
wherein the shaft comprises
a bone powder guide connected to the variable space, the bone powder guide allowing the bone powder to be inputted to the variable space from an external source, and
a bone powder outlet disposed on the non-threaded portion in the middle between the two thread portions, wherein the bone powder is discharged into the variable space through the bone powder outlet,
wherein each of the two wedge blocks comprises:
a wedge surface configured to be in contact with one longitudinal end of each of the movable blocks; and
a coupling protrusion provided on the wedge surface.