Attachment plate for top-tightening clamp assembly in a spinal f

Details Attachment plate for top-tightening clamp assembly in a spinal f Attachment plate for top-tightening clamp assembly in a spinal f

1993-08-19

1995-08-01

Graysay, Tamara L.

Surgery

Instruments

Orthopedic instrumentation

A61B 1770

Patent

active

054376700

ABSTRACT:
An attachment plate for use with a spinal rod system converts a normally side-tightening eyebolt to a top-tightenable arrangement for engaging spinal fixation elements to the spinal rod. The plate is configured for use with spinal fixation elements having a posteriorly projecting central post, one lateral surface of the post contacting the spinal rod when the rod extends through an aperture of the eyebolt. The attachment plate is generally L-shaped with a slot in one portion for receiving the posteriorly projecting threaded post of the eyebolt. The plate includes a flange portion having a surface configured to engage the lateral surface of the fixation element post opposite the spinal rod. The attachment plate includes a camming segment to provide a clamping force component directed toward the flange portion of the plate to thereby tightly clamp the spinal rod to the fixation element post when a nut is threaded onto the eyebolt threaded post.

REFERENCES:
patent: 4653481 (1987-03-01), Howland et al.
patent: 4655199 (1987-04-01), Steffee
patent: 5246442 (1993-09-01), Ashman et al.

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