Stainless steel orthodontic wire can be hardened by________________?
Correct answer: C. Work hardening
- A. Tempering
- B. Age hardening
- C. Work hardening
- D. Precipitation hardening
Explanation
Orthodontic stainless-steel wire is strengthened mainly by work hardening, produced when cold working increases dislocation density. Age or precipitation hardening is not the usual mechanism for conventional stainless-steel orthodontic wire.
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