Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?
Correct answer: D. Resilience
- A. Brittleness
- B. Toughness
- C. Tensile strength
- D. Resilience
Explanation
Resilience describes the ability to absorb elastic energy and recover the original shape when the load is removed, which explains the spring-back of orthodontic wire. Toughness includes energy absorbed up to fracture, not just elastic recovery.
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