Various parameters affect the force produced by the coil springs. The effect of alloy, wire size, lumen size, pitch angle (angle at which coils deviate from a perpendicular line to the long axis of the spring) of the coils and length of the springs on the load-deflection rate and stiffness have been investigated. The use of nickel titanium closing coils serves as one of many techniques for space closure, individual tooth retraction or protraction, distal movement of teeth, and traction on impacted teeth. Nickel titanium coil springs do not exhibit rapid force decay such as that seen with elastic chain or elastic modules, nor do they display the extremes in space closing forces of stainless steel coils or closing loops. Fluoride ions in the prophylactic agents have been reported to cause corrosion, discoloration and alteration of the mechanical properties of metallic wires, particularly when passivated wire surfaces break because of mechanical friction between brackets and wires. Key words: Oral Hygiene, Springs