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US 12,605,190 B2Granted
Pedicle screw stabilization systems and instruments
AssigneeGlobus Medical, Inc.
InventorsDavid Leff, Caelan Allen, Matthew Bechtel, George Yacoub
Life of this patent
Estimating the term…
Abstract
Orthopedic fixation devices, assemblies, instruments, and methods relating to the same. The orthopedic fixation device may include a tulip head with one or more internal components configured to secure a bone fastener, such as a saddle, retaining clip, and friction ring. A spinal rod may be secured in the tulip head, for example, with a locking cap, thereby securing the bone fastener. One or more instruments, such as screwdrivers and correction instruments may be used for reduction, derotation, compression and/or distraction.
Claims8
An orthopedic fixation assembly comprising:
- a tulip assembly including a tulip head, a saddle, a retaining clip, and a friction ring, the tulip head has two arms defining a rod slot therebetween and a bore extending therethrough, the saddle is receivable in the bore of the tulip head, the saddle has an upper surface defining a rod seat aligned with the rod slot, the retaining clip is positioned at a bottom of the tulip head, and the friction ring is positioned between the saddle and the retaining clip;
- and
- a bone fastener including a screw head receivable in the tulip head and a shaft configured for engaging bone,
- wherein the screw head includes helical grooves, and the friction ring is located around the screw head and in engagement with the helical grooves to help the tulip head retain its angular position relative to the bone fastener when positioned by a user.
1 more element
Dependencies are inferred from the claim text.