Patent Issued for Coupling assembly for coupling a rod to a bone anchoring element, and polyaxial bone anchoring device (USPTO 11925391).

A patent has been issued for a coupling assembly and polyaxial bone anchoring device developed by Biedermann Technologies GmbH & Co. KG. The invention aims to provide a safe and efficient connection between a rod and a bone anchoring element, with low insertion force and high retention force. The coupling assembly includes a receiving part, a retainer element, and a spring element, such as a wave spring, that facilitates the snap-over of the retainer element onto the head of the bone anchoring element. The invention also allows for a low-profile implant and reduces the risk of milling or sticking out of the bone. [Extracted from the article]