Question 202 · LDEK · Fixed appliances
Indicate features of orthodontic arch made of stainless steel:
1) ease of shaping, high plasticity;
2) high friction in relation arch-brackets;
3) it can be welded and soldered;
4) it can be used for correction of curve of Spee (by introducing sweep);
5) it can be a source of small, long active forces.
The correct answer is:
2) high friction in relation arch-brackets;
3) it can be welded and soldered;
4) it can be used for correction of curve of Spee (by introducing sweep);
5) it can be a source of small, long active forces.
The correct answer is:
- A. 1, 3, 5.
- B. 2, 4.
- C. 1, 3, 4.
- D. 2, 3, 5.
- E. only 3.
Hint
Think of steel as stiff, formable and weldable, and compare its friction and force profile with that of NiTi.
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