Patent ID: 9622789
Date: 2017-04-18
CPC Classifications: A61B

Claim:
1. A spinal fixation device comprising: a fastener including a head and a shank, the shank having a threaded portion, the shank configured for penetration into at least a first portion of a vertebral body, the threaded portion of the shank includes a first thread portion at a proximal portion of the shank which has a first thread pitch and a second thread portion at a distal portion of the shank which has a second pitch different from the first pitch; and an attachment member having a body portion and an arm portion extending therefrom and configured to engage at least a second portion of the vertebral body, the body portion including an opening configured and dimensioned to receive at least a portion of the fastener therethrough when the arm portion engages the second portion of the vertebral body and the shank of the fastener penetrates into the first portion of the vertebral body, the opening including a locking mechanism to secure the fastener to the attachment member, the locking mechanism having a rimmed edge extending from a sidewall of the opening and in proximity to a bottom surface of the body portion, the rimmed edge engaging at least one thread on the shank.