Patent ID: 8574274
Filing Date: 2013-11-05
Classification: A61B

Abstract:
1. A pedicle screw fixation system comprising: a receiving member having a housing for receiving a pedicle screw, the housing including internal threads therein, the housing including a housing bore at a first end of a longitudinal axis and an opening at a second end of the longitudinal axis; opposing first and second U-shaped receiving slots intersecting the opening, the opposing first and second U-shaped receiving slots operable for receiving a rod; the pedicle screw having a threaded shaft and a spherically-shaped head formed therewith at a shank, the pedicle screw being adapted to be inserted through the opening and the housing bore along the longitudinal axis; a socket located in the spherically-shaped head of the pedicle screw; a spherically-shaped seat formed within the housing, the spherically-shaped seat adapted to accept the spherically-shaped head of the pedicle screw; a coupling collar including a plurality of resilient fingers circumferentially disposed therearound, the coupling collar adapted for snap fit engagement with the head of the pedicle screw, the coupling collar having a surface of engagement including a first deformable face opposite to the plurality of resilient fingers the surface of engagement of the coupling collar being beneath a rod receiving space, the surface of engagement being configured to accept a downward force on the first deformable face to deform the first deformable face; a window extending through the coupling collar, the window providing access to the socket; and a set screw for threadably engaging the internal threads, an upper end of the set screw including a socket and a lower end of the set screw presenting a second deformable face.