Question 81 · LDEK · Functional appliances
What are the advantages of the Herbst appliance in comparison with functional appliances?
- A. works 8 hours/day and treatment time is short (8-10 months).
- B. works 16 hours/day and treatment time is short (5-7 months).
- C. works 16 hours/day and treatment time is short (6-8 months).
- D. works 24 hours/day and treatment time is short (3-5 months).
- E. works 24 hours/day and treatment time is short (6-8 months).
Hint
The Herbst is a fixed appliance, so consider its daily wear time, then recall the typical duration of active Herbst treatment.
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