Question 214 · LDEK · Fixed appliances
Super-elastic NiTi arch wires should not be used:
1) during decreasing the horizontal overbite (overjet);
2) in order to finishing the process of levelling and control of vertical overbite;
3) as initial wires;
4) during closing the post-extraction spaces;
5) when using open springs for retrieving space.
2) in order to finishing the process of levelling and control of vertical overbite;
3) as initial wires;
4) during closing the post-extraction spaces;
5) when using open springs for retrieving space.
- A. 1,2,3.
- B. 1,4.
- C. 2,3,4.
- D. 1,2,4,5.
- E. 3,4,5.
Hint
Separate the tasks that need a stiff wire (sliding, springs, overjet and overbite control) from the one task where flexibility is an advantage.
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