Patent ID: 7175623
Filing Date: 2007-02-13
Classification: A61B,A61F

Abstract:
1. A device useful in bone fusion, comprising: a cervical plate; a plurality of through holes provided in the cervical plate; each of the plurality of through holes comprising a channel; a bushing residing in the channel; the bushing comprising a shape that cooperatively engages the channel and a flexible bottom portion terminating in a bottom edge, whereby a head of a bone screw forces the flexible bottom portion outward as the bone screw is threaded, the bushing returning to an un-flexed position when the head is threaded through the bushing such that the bushing is not fixedly engaged with the channel and a protrusion on the head substantially aligns with the bottom edge, the protrusion and the bottom edge cooperatively engage to inhibit the bone screw from reverse threading.