Nitinol's unique properties of shape memory and superelasticity result from a phase transformation within its crystal structure that happens with temperature change. This makes eyeglass frames made from Nitinol can be bent severely out of shape, but then return perfectly to normal, which means nitinol glass frame is an ideal for everyone.
Nitinol wire is known as “ memory wire ” or “ smart wir ” . As the memory wires tries to straighten out, it will exert gradual pressure on your teeth. Pressure over time is how teeth are moved in orthodontia.