US 12,383,312 B2
Coupling device for coupling a rod to a bone anchor and system including such a coupling device and at least two bone anchors
Lutz Biedermann, VS-Villingen (DE); Timo Biedermann, Trossingen (DE); Bernd Fischer, Friedenweiler (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 Dec. 13, 2024, as Appl. No. 18/981,083.
Claims priority of provisional application 63/610,832, filed on Dec. 15, 2023.
Claims priority of application No. 23217301 (EP), filed on Dec. 15, 2023.
Prior Publication US 2025/0195111 A1, Jun. 19, 2025
Int. Cl. A61B 17/70 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/7038 (2013.01) [A61B 2017/00477 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for coupling a rod to bone, the system comprising:
a first bone anchor comprising a first shank for anchoring to bone and a first head;
a second bone anchor different from the first bone anchor and comprising a second shank for anchoring to bone and a second head; and
a coupling device comprising:
a receiving part having a first end, an opposite second end, and a central axis extending between the first end and the second end, the receiving part comprising a rod receiving portion at the first end for receiving a rod, and a head receiving portion at the second end that defines an accommodation space for interchangeably accommodating the first head of the first bone anchor or the second head of the second bone anchor; and
a locking member positionable at least partially around the head receiving portion and movable between at least a first position where a head that is held in the accommodation space is movable relative to the receiving part, and a second position where the head that is held in the accommodation space is locked relative to the receiving part;
wherein the coupling device comprises a restraining surface configured to cooperate with the first bone anchor to restrict pivoting of the first bone anchor relative to the receiving part, and wherein the coupling device is configured to cooperate with the second bone anchor to restrict pivoting of the second bone anchor relative to the receiving part differently than the restricted pivoting of the first bone anchor relative to the receiving part.