Receiving part for receiving a rod for coupling the rod to a bone anchoring element and a bone anchoring device with such a receiving part

A bone anchoring device comprising:

• a bone anchoring element having a shaft and a head;
• and
• a receiving part for receiving a rod for coupling the rod to the bone anchoring element, the receiving part comprising:
• a monolithic receiving part body having a channel at a first end for receiving the rod, an engagement surface on an inner wall of the receiving part body at the first end that is configured to receive a closure element for securing the rod in the channel, and an accommodation space at a second end below the first end for accommodating the head of the bone anchoring element;
• and
• a pressure element positionable in the receiving part body, and configured to contact the head to lock the head relative to the receiving part;
• wherein when the head and the pressure element are in the receiving part body, the pressure element is moveable to a pre-locking position where an upwardly facing surface of the pressure element abuts against another portion of the receiving part body that is distinct from the engagement surface to restrict the pressure element from moving towards the first end of the receiving part body, and where a compressible portion directly engages a region of the head below a greatest diameter of the head to clamp the head by friction to temporarily hold an angular position of the bone anchoring element relative to the receiving part.

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 at a first end for receiving the rod, an engagement surface on an inner wall of the receiving part body at the first end that is configured to receive a closure element for securing the rod in the channel, an accommodation space for accommodating the head of the bone anchoring element, and an opening at a second end below the first end for inserting the head into the accommodation space;
• and
• a pressure element positionable in the receiving part body, and configured to contact the head to lock the head relative to the receiving part;
• wherein when the pressure element is in the receiving part body, the pressure element is moveable from an inserting position where the head is insertable through the opening into the receiving part body, to a pre-locking position where the head is clamped by friction to temporarily hold an angular position of the bone anchoring element relative to the receiving part, and wherein when the pressure element is adjusted from the inserting position to the pre-locking position, a spring portion is configured to expand to restrict the pressure element from moving back towards the inserting position, the spring portion being separable from the receiving part body and configured to be spaced apart from the engagement surface.