Innovasis, Inc.

Keith R Peterson

Brent A Felix

Christian L Lauridsen

A method for mounting a polyaxial screw into a bone includes rotating a drive cap so that a screw mounted to the drive cap is screwed into a bone, the drive cap having a socket in which a portion of the screw is pivotably disposed, at least a portion of a collet being disposed within the socket between the screw and the drive cap. A stabilizing structure and a fastener are positioned onto a shaft projecting from the drive cap. The fastener is advanced along the shaft so as to push a portion of a compression cap against the collet which in turn wedges the collet within the socket of the drive cap and causes the collet to bias against a portion of the screw, thereby locking the position of the screw, the collet, and the drive cap relative to each other.

Method for polyaxial screw system

A polyaxial screw system includes a drive cap having a partition wall with a first side and an opposing second side, a passage extending through the partition wall. A sleeve projects from the second side of the partition wall, the sleeve and partition wall bounding a socket. A shaft outwardly projects from the first side of the partition wall. A screw has a threaded portion and a head formed on an end thereof. The head of the screw is at least partially disposed within socket of the drive cap. A collet is at least partially disposed within the socket of the drive cap. At least a portion of a compression cap movably extends through the opening in the partition wall so that the compression cap can selectively move the collet relative to the drive cap.

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Orem, UT, United States of America

Keith R Peterson