Cervical plate
AssigneeLanx, Inc.
InventorsJeffrey Thramann, Michael Fulton, Bryan Hildebrand, Charles B. Powell
Life of this patent
Estimating the term…
Abstract
The present invention provides a cervical plate and bone graft(s) that are capable of being attached prior to insertion of the bone graft into an intervertebral space. After insertion, the vertebrae hold the bone graft and cervical plate in place facilitating the anchoring of the cervical plate to the vertebrae. Further, a screw back out prevention device can be coupled to the cervical plate to prevent screws from backing out.
Claims7
A screw back out prevention device for use with cervical plates to inhibit bone screws from backing out, the prevention device comprising:
- a bushing;
- the bushing having an inner edge forming a gap through which a screw can be threaded;
- at least one elastically-loaded pin;
- at least one notch located in a head of the screw, the at least one elastically-loaded pin engages the at least one notch;
- and
- the bushing resides between the head of the screw and the cervical plate such that the at least one elastically-loaded pin engages the screw when the screw is threaded to inhibit the screw from backing out.
A screw back out prevention device for use with cervical plates to inhibit bone screws from backing out, the prevention device comprising:
- a bushing;
- the bushing having an inner edge forming a gap through which a screw can be threaded;
- at least one elastically-loaded pin;
- at least one channel in the bushing corresponding to the at least one elastically-loaded pin, wherein the elastically-loaded pin resides in the at least one channel;
- at least one spring between the bushing and the at least one elastically-loaded pin;
- and
- the bushing resides between the head of the screw and the cervical plate such that the at least one elastically-loaded pin engages the screw when the screw is threaded to inhibit the screw from backing out.
Dependencies are inferred from the claim text.