Patent ID: 8652181
Filing Date: 2014-02-18
Classification: A61B,A61F

Abstract:
1. A back out prevention device in a cervical plate, the cervical plate comprising at least one through hole, the prevention device comprising: a bushing residing in the through hole; a screw; and at least one first bonding material, wherein the bushing has an inner sidewall containing a first groove therein, wherein the first groove has at least first and second portions that reside on opposing sides of the inner sidewall of the bushing and the at least one first bonding material residing in the first groove, wherein the screw comprises a screw head and a shank, wherein the screw head has an outer sidewall containing a second groove therein, wherein the second groove has at least first and second portions that reside on opposing sides of the outer sidewall and at least one second bonding material residing in the second groove, and the first and second portions of the first groove and the first and second portions of the second groove are configured to align coaxially with one another and form a space extending therebetween when the bushing and the screw head are configured in attachment with one another, such that when the screw is threaded into a vertebral body, the at least one first bonding material in the first groove of the inner sidewall aligns with the at least one second bonding material in the second groove of the outer sidewall to fill the space extending therebetween and to form a bond that inhibits the screw from backing out.