Patent ID: 8696718
Filing Date: 2014-04-15
Classification: A61B,Y10T

Abstract:
1. A polyaxial screw assembly comprising: a screw having a shank and a head, the head defining a central recess and including a plurality of spaced-apart segments disposed about the central recess, the plurality of spaced-apart segments defining a plurality of gaps therebetween; a coupling having a proximal flange and a body extending distally from the proximal flange, the body configured for seating within the central recess of the head of the screw with the proximal flange disposed proximally of the head of the screw; the body including a plurality of knobs extending radially outwardly therefrom, each of the knobs configured for positioning within one of the gaps defined between the spaced-apart segments of the head of the screw when the body is seated within the central recess; a housing defining a passageway therethrough including a distal portion and a proximal portion, the distal portion of the passageway configured to receive the coupling and the screw head; and an insert having an opening configured for positioning about the screw shank adjacent the screw head, the insert configured to engage the housing within the distal portion of the passageway of the housing to retain the screw head and the coupling within the housing between the housing and the insert.