Stainless steel orthodontic wire can be hardened by________________?
Correct answer: B. Work hardening
- A. Tempering
- B. Work hardening
- C. Age 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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