The orthopedic bone screws are used to fasten the plate to the bone and are designed to produce compression in bones to facilitate the fractured bone pieces to come closer so that bone union can take place. The downward force on the screw for fixing it is converted into compression and allocates this compression in an even way throughout the surface of injured bones. This compression is the reason that the broken bone components come closer and heal faster. Screws also help in aligning and stabilize the fractured bones in a fixed position.