US 12,484,938 B2
Treatment device and screw
Noritaka Yonezawa, Ishikawa (JP)
Assigned to SPINE CHRONICLE JAPAN CO., LTD., Ishikawa (JP)
Appl. No. 18/565,507
Filed by Spine Chronicle Japan Co., Ltd., Kanazawa (JP)
PCT Filed Sep. 28, 2022, PCT No. PCT/JP2022/036147
§ 371(c)(1), (2) Date Nov. 29, 2023,
PCT Pub. No. WO2024/069795, PCT Pub. Date Apr. 4, 2024.
Prior Publication US 2024/0341823 A1, Oct. 17, 2024
Int. Cl. A61B 17/88 (2006.01); A61B 17/70 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/7098 (2013.01) [A61B 17/8888 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A treatment device comprising: a screw; a cylindrical driver configured to drive the screw into bone; an inner sleeve configured for insertion into the driver; and a guide pin configured for insertion into the inner sleeve, wherein:
the screw includes on an outer wall a thread that can tap into bone, and a through hole that allows the inner sleeve to pass from a head to a tip of the screw along a central axis in a through hole of the driver and the through hole of the screw; and
the driver is configured to fit onto the head of the screw and when moved along the central axis be joined to the screw to transmit torque about the central axis to the screw;
the inner sleeve can be inserted from a distal end of the driver and has a distal end configured to be connected to the distal end of the driver in a state in which the driver and the screw are joined together, and a tip of the inner sleeve protrudes more proximally than the tip of the screw; and
the inner sleeve is connected to the screw when the guide pin is inserted in a through hole of the inner sleeve with the tip of the inner sleeve protruding more proximally than the tip of the screw.