US 12,070,248 B2
Polyaxial bone anchoring device and system including an instrument and a polyaxial bone anchoring device
Lutz Biedermann, Villingen (DE); Timo Biedermann, Trossingen (DE); and Bernd Fischer, Bräunlingen (DE)
Assigned to BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed by BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed on Jul. 1, 2021, as Appl. No. 17/365,430.
Application 17/365,430 is a continuation of application No. 16/287,896, filed on Feb. 27, 2019, granted, now 11,090,088.
Claims priority of provisional application 62/639,224, filed on Mar. 6, 2018.
Claims priority of application No. 18160167 (EP), filed on Mar. 6, 2018.
Prior Publication US 2021/0401466 A1, Dec. 30, 2021
Int. Cl. A61B 17/70 (2006.01); A61B 17/56 (2006.01); A61B 90/00 (2016.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7032 (2013.01); A61B 17/7035 (2013.01); A61B 2017/564 (2013.01); A61B 17/7076 (2013.01); A61B 2090/037 (2016.02)] 25 Claims
OG exemplary drawing
 
1. A polyaxial bone anchoring device for coupling a rod to a bone, the bone anchoring device comprising:
a bone anchoring element comprising a shank and a head;
a receiving part comprising an upper member having a first end, a second end, and a recess at the first end for receiving the rod, and a lower member separate from and connectable to the second end of the upper member by rotating the lower member relative to the upper member;
a pressure member insertable from the second end of the upper member into the upper member to exert pressure on the head; and
an insert member separate from the receiving part and the pressure member and configured to keep the bone anchoring element connected to the receiving part;
wherein when the lower member is connected to the upper member, the lower member defines an opening of the receiving part at an end opposite the first end of the upper member, the opening having an inner diameter that is greater than a greatest diameter of the head of the bone anchoring element, and the lower member is configured to prevent separation of both the pressure member and the insert member from the receiving part, while the pressure member is prevented from directly contacting the lower member.