Patent attributes
A polyaxial bone anchoring device includes an anchoring element having a shaft and a head, a receiving part having a first end and a second end, a bore extending from the first end towards the second end, a seat for receiving the head, and at least one threaded through hole transverse to the bore, a pressure element to exert pressure onto the head, such that the head is pivotable and can be locked at an angle relative to the receiving part, the pressure element having at least one hole configured to at least partially align with the through hole, and at least one set screw threadable into the through hole to engage the pressure element at the hole such that a force is exerted by the pressure element onto the head that maintains the head at an adjustable angular position relative to the receiving part by friction.
