Patent ID: 8998965
Filing Date: 2015-04-07
Classification: A61B,Y10T

Abstract:
1. A bone anchoring device, comprising: a receiving part for receiving a rod, the receiving part having a first bore coaxial with a longitudinal axis, a second bore, and a seat comprising an inner wall; a pin configured to protrude from a hole recessed inside the inner wall of the seat; an anchoring element having a first end configured to attach to a bone and a second end comprising a head configured to be positioned against the seat to engage the pin when the pin is in the hole, the head comprising a surface having a spherically shaped surface portion and an exterior portion from the spherically shaped surface portion; wherein the inner wall of the seat is configured to be around the head and to seat the head when the head is positioned in the receiving part; wherein pivoting of the anchoring element is limited to a single plane by a connection between the head of the anchoring element and the pin when the head is positioned in the seat and the pin is in the hole; wherein the connection comprises a guiding surface of the portion recessed from the spherically shaped surface portion of the head that moves along a guiding surface of the pin resulting in a movement of the anchoring element relative to the receiving part being limited to the single plane; and wherein the pin has a first end and a second end at opposite ends of a longitudinal axis of the pin and wherein the first end of the pin and the second end of the pin face away from the head of the anchoring element when the head is positioned in the seat and the pin is in the hole.