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US 10,478,239 B2Granted
Pedicle screw assembly
AssigneeSpinal Balance, Inc.
InventorsAnand K. Agarwal, Aakash Agarwal
Life of this patent
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Abstract
A pedicle screw assembly includes a threaded shank portion formed from a polymer material and a head assembly. The head assembly includes a tulip having extending arms, the tulip engaging a reaction bar such that loads applied to the pedicle screw assembly can be transferred to another pedicle screw assembly in order to immobilize a section of a spinal column.
Claims6
A pedicle screw assembly comprising:
- a head assembly including a tulip having a U-shaped pocket defined by a pair of extending arms, each of the extending arms including a threaded inner surface and a threaded outer surface;
- a threaded shank portion extending from the tulip;
- a retaining nut threadably engaged with the threaded outer surface of the extending arms;
- and
- a set screw threadably engaged with the threaded inner surface of the extending arms, wherein the set screw outwardly deflects the extending arms against the retaining nut such that the retaining nut is frictionally prevented from rotating.
2 more elements
Dependencies are inferred from the claim text.