Osteosynthetic fixation device
AssigneeSynthes USA, LLC
InventorsJohannes F. Schlapfer, Martin Hess
Life of this patent
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Abstract
An osteosynthetic fixation device consists of a fixation element 1 which has a conical head section 11 and an anchoring element 12 abutting it which is for attachment into the bone. The fixation device also consists of a spherically formed, layered, slotted clamping piece 2 which has a conical borehole 21 for installation of the conical head section 11, and which is meant for locking within a connecting piece 3 equipped with a spherically shaped layered borehole 31. Fixation piece 1 has an axially arrayed tension element 4, permitting axial displacement and wedging of conical head section 11 in the borehole 21 that corresponds with it. The fixation device is appropriate for use as a plate/screw system, an internal or external fixator, and in particular for spinal column fixation.
Claims25
An osteosynthetic fixation device comprising:
- a fixation element having a longitudinal axis, a head section at least in part of conical shape and an anchoring element abutting said head section, for attachment to bone,
- a separate clamping element having the shape of a layer of a sphere and extending on both sides of a great circle of said sphere, said clamping element having a longitudinal axis, a conical bore hole and a plurality of slots extending transverse to said great circle and,
- a separate tensioning element extending from the head section for drawing and wedging the head section of said fixation element into the conical bore hole of said fixation element independent of the fixation element's attachment to the bone.
Dependencies are inferred from the claim text.