US 12,440,246 B2
Polyaxial bone anchoring device and system including an instrument and a polyaxial bone anchoring device
Timo Biedermann, Trossingen (DE); and Berthold Dannecker, St. Georgen (DE)
Assigned to BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed by BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed on Mar. 6, 2024, as Appl. No. 18/597,710.
Application 18/597,710 is a continuation of application No. 17/190,937, filed on Mar. 3, 2021, granted, now 11,937,850.
Application 17/190,937 is a continuation of application No. 16/224,535, filed on Dec. 18, 2018, granted, now 10,973,554, issued on Apr. 13, 2021.
Claims priority of provisional application 62/609,862, filed on Dec. 22, 2017.
Claims priority of application No. 17210500 (EP), filed on Dec. 22, 2017.
Prior Publication US 2024/0277382 A1, Aug. 22, 2024
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7032 (2013.01); A61B 17/7035 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bone anchoring device comprising:
a bone anchoring element comprising a head and a shank for anchoring to bone;
a receiving part for coupling a rod to the bone anchoring element, the receiving part having a first end, a second end below the first end, and a central axis extending between the first end and the second end, the receiving part comprising two legs defining a recess at the first end for receiving the rod, and a head receiving portion at the second end configured to hold the head of the bone anchoring element therein; and
a clamping member configured to be assembled to the head receiving portion with a first end positioned closer to the first end of the receiving part and a second end positioned closer to the second end of the receiving part, wherein the second end of the clamping member comprises a plurality of projections;
wherein the head receiving portion comprises a plurality of circumferentially spaced apart recesses each extending to an axial position that is lower than an axial position of a greatest diameter of the head measured in a direction perpendicular to the central axis when the head is in the head receiving portion; and
wherein when the clamping member is assembled to the head receiving portion, the clamping member is rotatable around the central axis from a first rotational orientation where the projections of the clamping member are out of alignment with the recesses of the head receiving portion, to a second rotational orientation where the projections of the clamping member are circumferentially aligned with and configured to extend into the recesses of the head receiving portion.