Bone anchoring device

Details Bone anchoring device Bone anchoring device

2006-07-07

2011-10-11

Barrett, Thomas C. (Department: 3775)

Surgery

Instruments

Orthopedic instrumentation

Reexamination Certificate

active

08034089

ABSTRACT:
A bone anchoring device has an anchoring element, a receiving portion, and a pressure element. The anchoring element includes a shank to be anchored in a bone or a vertebra and a head, the head having an exterior surface with a spherical segment-shaped portion. The shank and the head are separate parts. The receiving portion includes a first end, a second end opposite to the first end, a longitudinal axis passing through the two ends, a bore coaxial with the longitudinal axis, and a first region adjacent to the second end for receiving a spherical segment-shaped section of the head. The pressure element exerts pressure on the head to lock the head in the receiving portion. The head has a hollow inner portion to receive a free end portion of the shank and wherein the head and the end portion are formed such that the end portion can be elastically clamped by the head.

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patent: 1 579 816 (2005-09-01), None
patent: WO 94/00066 (1994-01-01), None
European Search Report for Application No. EP 05 01 4840 dated Dec. 2, 2005.

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