Patent ID: 8167914

Claim:
An apparatus for securing a rod to a bone fastener, comprising: a collar comprising: a first end comprising: two arms, wherein each arm comprises a recessed portion on an inner surface; and a channel defined by the two arms and having a geometric configuration that accommodates the rod; and a second end comprising an opening opposite the first end and running at least partially from the second end of the collar to the first end of the collar to form a cavity; a resilient insert comprising: a central passage centered about the longitudinal axis of the resilient insert and running the length of the resilient insert; a ridge configured for engagement with the recessed portions of the collar; and a slot connected to the central passage and running the length of the resilient insert; wherein the resilient insert has an outer diameter greater than the width of the channel of the collar when the resilient insert is in a neutral state; wherein the slot is configured to allow the outer diameter of the resilient insert to decrease such that the resilient insert is insertable entirely inside the channel of the collar, allowing the ridge of the resilient insert to engage the recessed portions of the two arms to inhibit passage of the resilient insert out of the recessed portions of the collar; and a pin comprising: a central core for insertion into the central passage of the resilient insert; and a radial extension having a selected thickness for insertion into the slot of the resilient insert to inhibit the outer diameter of the resilient insert from decreasing.