06280442 is referenced by 464 patents and cites 44 patents.

A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.

Title
Multi-axial bone screw assembly
Application Number
9/387991
Publication Number
6280442 (B1)
Application Date
September 1, 1999
Publication Date
August 28, 2001
Inventor
Dennis J Buchanan
Memphis
TN, US
Chris Johnson
Germantown
TN, US
David Brumfield
Southaven
MS, US
Craig Squires
Memphis
TN, US
John Stewart Young
Memphis
TN, US
B Thomas Barker
Bartlett
TN, US
Agent
Woodard Emhardt Naughton Moriarty & McNett
US
Assignee
SDGI Holdings
DE, US
IPC
A61B 17/68
View Original Source