Abstract
A study of the properties of NiTi wires used by patients and then sterilized by practical methods can give us the answer to our million dollar questions—can we recycle NiTi wires without affecting the quality of orthodontic treatment? 30 wire samples of 0.016 inch nickel-titanium alloy (Nitanium) (Ortho Organizers, Inc, CA) were collected from patients after using them for specified time period. These samples were cleaned with a solution of 70% isopropyl alcohol and then sterilized by (1) Autoclave and (2) Cold sterilization. Samples from each group were subjected to mechanical testing procedures: (1) Three point bending test (2) Uniaxial cyclic tensile test (3) Uniaxial tensile test till failure. A comparison of the mechanical properties was done of new and recycled wires.
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