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

摘要

A receiving part for receiving a rod for coupling the rod to a bone anchoring element includes a receiving part body including a rod receiving portion with a channel for receiving a rod, and a head receiving portion for accommodating a head of a bone anchoring element, the head receiving portion having an open end and being flexible so as to allow introduction and clamping of the head, the head receiving portion having an exterior surface with a tapered portion; and a locking ring around the head receiving portion and including an interior surface with a curved portion configured to engage the tapered portion of the exterior surface of the head receiving portion to clamp the head.

主权项

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 comprising:
a rod receiving portion with a channel for receiving a rod, anda head receiving portion for accommodating a head of a bone anchoring element, the head receiving portion having an open end and being flexible so as to allow introduction and clamping of the head and an exterior surface, wherein a longitudinal axis extends from the rod receiving portion to the head receiving portion; and a locking ring configured to be arranged around the head receiving portion and comprising an interior surface with a curved portion curving along a direction parallel to the longitudinal axis, wherein when the locking ring is around the head receiving portion, the locking ring is movable along the longitudinal axis between a first position wherein a space between the locking ring and the head receiving portion permits expansion of the head receiving portion for inserting the head, and a second position wherein the curved portion is configured to engage the exterior surface of the head receiving portion to clamp the head therein.