It was back in 2006 that we saw the introduction of new memory metal frame collections. Shape Memory metals were developed by NASA for the space industry and have been used in a variety of applications like bioengineering, artery and vein reinforcement, as dental wire and, as we know, eyeglass frames.
Using memory metal plates to mend broken bones uses body heat. That heat causes the metal to want to contract to its original shape and when attached to bone ends, presses the fracture together so the bones can knit. Eyewear frame memory metals are Nickel Titanium alloys that demonstrate great super-elasticity. That means they prefer to be in the shape and position of the way they were formed. If bent they return to their original shape.
Temples and bridges are created in memory metals for stability and iit improves the fit of eyewear. When these temples are bent, a molecular shift takes place; a higher energy state is created. This state is unstable at room temperature. The metal always seeks a lower energy state so the temple changes back to the previous form. Therefore, the temple returns to the original “memorized” shape.
Suggest to patients, "With memory metal frames you can be assured of a frame that lasts longer and keeps its shape for the life of the prescription. In fact, since these frames stand up to the toughest, most active wearer, they are perfect for any patient concerned with the accidental twisting, turning or bending of their eyewear.”