How have new “high tech” wires changed orthodontics?

In recent years, many advances in orthodontic materials have taken place. Braces are smaller and more efficient. The wires now being used are no longer just stainless steel. They are made of alloys of nickel, titanium, copper and cobalt, and some of the wires are heat-activated. (The nickel-titanium alloy was originally engineered by NASA to automatically activate antennae or solar panels of spacecraft orbiting into the sun’s rays.) These new kinds of wires cause the teeth to continue to move during certain phases of treatment, which may reduce the number of appointments needed to make adjustments to the wires.