Orthodontics: Appliances and Assisting · CDA

Which appliance uses telescoping rods and fixed attachments to advance the lower jaw in Class II patients without requiring patient compliance like elastic wear?

  1. Palatal expander widening the maxillary arch
  2. Forsus Fatigue Resistant Device
  3. Hawley removable acrylic retainer appliance
  4. Reverse-pull headgear with facemask attachment
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Correct answer: Forsus Fatigue Resistant Device

The Forsus spring appliance provides continuous forward force on the lower jaw and backward force on upper molars to correct overbite even if patient compliance is low, unlike elastics.

Difficulty: Medium Question 12 of 19

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