POLYAXIAL BONE ANCHORING DEVICE WITH ENLARGED PIVOT ANGLE

Abstract: a polyaxial bone anchoring device includes a receiving part configured to be pivotably connected to a head of an anchoring element, the receiving part having a channel for receiving a rod and an accommodation space having an opening for accommodating the head, and a sleeve-like insert piece having a sleeve axis and a spherical segment-shaped outer surface portion. the insert piece is configured to be positioned around a portion of the head in the receiving part and to pivot in the receiving part, and includes a first part and a separable second part configured to be connected with the first part by a connection structure configured to permit translational movement between the first part and the second part in a direction transverse to the sleeve axis, while preventing movement between the first part and the second part in a direction parallel to the sleeve axis.

Inventor(s): Lutz Biedermann, Martin Meer

CPC Classification: A61B17/8605 ({Heads, i.e. proximal ends projecting from bone})

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