07445627 is referenced by 122 patents and cites 35 patents.

A fastener and a bone fixation assembly for the internal fixation of vertebral bodies such as a pedicle screw is provided which allows a detachable tulip to be provisionally locked to a pedicle screw, while separately, the rod securely locks to the tulip. According to one exemplary embodiment, the tulip assembly includes a tulip body and an inner tulip member, the tulip body having a non-circular surface disposed on an outer surface. Additionally, a fastener is coupled to the tulip assembly and positionable to retain the tulip assembly on the head of a screw. Further, a cap having an outer surface and a plurality of inner protrusions is provided, wherein the plurality of inner protrusions are configured to mateably connect to the non-circular surface on the tulip body to compress the tulip assembly and secure a rod.

Title
Polyaxial pedicle screw assembly
Application Number
11/342420
Publication Number
7445627 (B2)
Application Date
January 30, 2006
Publication Date
November 4, 2008
Inventor
Michael D Ensign
Salt Lake City
UT, US
David R Warnick
Spanish Fork
UT, US
David T Hawkes
Pleasant Grove
UT, US
Agent
Rader Fishman & Grauer
Bryan G Pratt
Assignee
AlpineSpine
UT, US
IPC
A61F 2/30
A61B 17/58
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