American Board of Orthodontics Practice Exam – Complete Prep Guide

The addition of copper to Nickel Titanium (NiTi) wires enhances their mechanical properties, particularly in terms of strength while simultaneously minimizing energy loss during deformation. The incorporation of copper contributes to the formation of a beta phase in the NiTi alloy, which significantly influences its strength characteristics. This increased strength can lead to a more effective force application during orthodontic treatment, resulting in better control of tooth movement.

Additionally, the modification in the alloy composition helps maintain a balance between flexibility and rigidity, reducing the energy lost during cycles of loading and unloading—an important feature in orthodontics, where efficiency in force delivery is essential for optimal tooth movement. This improvement is especially valuable in clinical scenarios where maintaining consistent forces is critical for achieving desired outcomes.

The other options do not accurately describe the impact of copper on NiTi wires in a meaningful way regarding their application in orthodontics. For example, the effects on ductility or oxidation are not as direct or consequential in this context, while wire thickness is typically a separate consideration based on application requirements, rather than a direct result of copper inclusion.