Patent ID: 8926671
Filing Date: 2015-01-06
Classification: A61B

Abstract:
1. A receiving part for receiving a rod for coupling the rod to a bone anchoring element, the receiving part comprising: a receiving part body having a channel for receiving a rod and defining a bore with a first diameter that provides an accommodation space for accommodating a head of a bone anchoring element, the receiving part body further defining an opening with a second diameter that is smaller than the first diameter for inserting the head, wherein an edge is formed between the bore and the opening; and a pressure element at least partially in the accommodation space, the pressure element comprising a first portion having a recess to receive the rod, and a second portion having a flexible portion defining a hollow interior to accommodate and clamp the head and an opening defined by an inner surface of an end region of the second portion to insert the head; wherein the pressure element is moveable along a longitudinal axis of the receiving part body from an inserting position to insert the head, to a pre-locking position where an outer surface of the end region of the second portion of the pressure element engages the edge of the receiving part body to clamp the head in the receiving part by a pre-stress exerted by the pressure element, to a locking position to lock the head in the receiving part.