US 12,268,419 B2
Rod for spinal fixation implant
Kazumi Akatsu, Fukushima (JP)
Assigned to SYNTEC CORPORATION, Iwaki (JP)
Appl. No. 18/681,311
Filed by SYNTEC CORPORATION, Iwaki (JP)
PCT Filed Feb. 16, 2023, PCT No. PCT/JP2023/005429
§ 371(c)(1), (2) Date Feb. 5, 2024,
PCT Pub. No. WO2023/162847, PCT Pub. Date Aug. 31, 2023.
Claims priority of application No. 2022-030216 (JP), filed on Feb. 28, 2022.
Prior Publication US 2024/0341813 A1, Oct. 17, 2024
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7005 (2013.01) 4 Claims
OG exemplary drawing
 
1. A rod for spinal fixation implant that is provided with a screw portion fixed to a vertebral bone and a coupling portion configured to couple the screw portion to the rod, and fixes a plurality of vertebral bones to each other via the rod, the rod for spinal fixation implant comprising:
a layered winding portion configured by layering four layers, in a radial direction, of spiral bodies obtained by winding four wires in a spiral shape with a space portion inside and a gap portion being opened between respective wires in an axial direction; and
a rod-shaped core material disposed in the space portion,
wherein the layered winding portions of four layers are disposed such that spiral directions of the spiral bodies of adjacent layers are opposite to each other.