US 2010/0168796 A1 · Bone anchoring member with clamp mechanism

Abstract

A pedicle screw for insertion into the pedicle portion of a vertebra and having at its exposed end a threaded rod connected in a generally parallel orientation to the longitudinal axis of the pedicle screw but laterally offset from the longitudinal axis of the pedicle screw. The threaded rod may be secured directly to the screw but is preferable provided with a collar that is captured by an enlarged screw head to seat, orient and retain the threaded rod in position. A locking arm and retaining nut are provided over the threaded rod for affixing a spinal rod to the pedicle screw substantially over and aligned with the longitudinal axis of the screw. A yoke may be provided in the collar also to receive and secure the rod. An alternate cap and clamping elements enable the incorporation of cross links between multiple screws and/or rods.

Claims25

Dependent claims

An anchoring member for attachment to a bone and retention of a rod, the anchoring member comprising:

a first shaft having a threaded first end for insertion into a vertebra and a second end;
a head affixed to the second end of said first shaft, the diameter of said head being greater than the diameter of the first shaft;
a second shaft affixed to the head so as to be substantially parallel to but laterally offset from the longitudinal axis of the first shaft;
a cap having a retaining arm and a collar, said collar adapted for receiving said second shaft;
and
a nut for threaded engagement with said second shaft whereby said cap may be advanced down said second shaft to retain said rod positioned between said head and said retaining arm.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/653,086Filed 8 Dec 2009

Priority

29 Jul 2008

Published

1 Jul 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 17/7037
Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other: wherein pivoting is blocked when the rod…
A61B 17/7035
Screws or hooks combined with longitudinal elements which do not contact vertebrae: screws or hooks, wherein a rod-clamping part and a…
A61B 17/705
Connectors, not bearing on the vertebrae, for linking longitudinal elements together: for linking adjacent ends of longitudinal elements
A61B 17/7005
With a cross-section which varies along its length: parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the…

Family

Application61/137,255Us provisional application · filed 29 Jul 2008

Application12/462,127Continuation in part · filed 29 Jul 2009

Application12/653,086Continuation in part

US 2010/0042165 A1Published application

US 8,398,684 B2Related patent

US 2010/0168796 A1This patent

From the US filing history. Foreign family members aren’t listed.

Bone anchoring member with clamp mechanism

Life of this patent

Bone anchoring member with clamp mechanism

Life of this patent

Abstract

Claims25