Patent ID: 8764805

Claim:
A stabilization assembly for stabilizing a vertebra or other bone, comprising: at least two rods having different diameters; an anchoring element having a shaft for anchoring in a bone and a head; a receiving part for interchangeably receiving any one of the at least two rods to connect the rod to the anchoring element, the receiving part comprising a rod receiving portion with a channel for receiving the rod, and a head receiving portion for accommodating the head of the anchoring element, the head receiving portion having an open end and being flexible to allow introduction and clamping of the head; and a locking ring configured to be arranged around the head receiving portion and to clamp the head in the head receiving portion, wherein the locking ring can assume a first position around the head receiving portion where the head can be introduced into the head receiving portion, and a second position closer to the open end of the head receiving portion where the head is clamped in the head receiving portion by the locking ring; wherein the locking ring comprises a contact surface configured to contact any one of the at least two rods at at least two distinct contact areas that are spaced apart from one another in a circumferential direction of the rod, and wherein when any one of the at least two rods is in contact with the contact surface, the contact areas are separated in the circumferential direction by a region in which the rod and the contact surface are spaced apart.