Patent ID: 7094239
Filing Date: 2006-08-22
Classification: A61B,A61F,Y10S,Y10T

Abstract:
1. An apparatus for locking bone screws formed of cortical bone for use in the human body to an implant having a screw hole for receiving at least a portion of a screw therethrough, said apparatus comprising: at least one bone screw formed substantially of cortical bone of a single cortical thickness, said screw having a leading end, a trailing end opposite said leading end, and a shaft therebetween, said shaft having a mid-longitudinal axis and a length, a thread extending from said shaft along at least a portion of its length, said thread having an outer diameter dimensioned to pass through the screw hole in the implant, said screw having an enlarged portion proximate said trailing end with a dimension transverse to the mid-longitudinal axis of said shaft greater than said outer diameter of said thread, said enlarged portion configured to prevent said head from passing through the screw hole in the implant; and a screw lock formed substantially of cortical bone configured to cooperatively engage at least a portion of the implant so as to prevent said screw from linear motion along the mid-longitudinal axis of said shaft in a direction opposite to the direction of insertion when said screw is inserted through the screw hole to attach the implant to a bone portion of the human body.