Patent ID: 8998968
Filing Date: 2015-04-07
Classification: A61B

Abstract:
1. A medical screw system configured to facilitate determination of when the screw system is desirably set in a bone during implantation of the screw at a surgical site, the screw system comprising: a screw having a head, a tip, and a shank extending between the head and the tip having a first thread set thereon; and a washer having a central ring surrounding a head receiving pocket configured for receiving the head of the screw, a plurality of arms spaced around and extending outwardly from the ring, the arms each having a bone contacting surface that engages the bone when the screw is implanted into the bone, and a groove defined between the arms and an exterior of the central ring, the groove being configured to enable the arms to flex when the screw system becomes desirably set into the bone to provide a visual indication that the screw is desirably set in the bone; wherein the screw system is implantable into the bone by positioning the head of the screw onto the washer with head of the screw received by the pocket of the washer and the first thread set of the screw extending past the arms of the washer, and the screw system is implantable onto the bone by screwing the first thread set into the bone until the screw is desirably set.