Question 203 · LDEK · Extraoral appliances
Theoretically “clean” distalization of maxillary molars with the use of Headgear can be achieved with the use of:
- A. high pull headgear and short external arms parallel to the occlusal plane.
- B. combined headgear with short external arms bent upwards.
- C. low pull headgear with long external arms bent back.
- D. low pull headgear with long external arms bent upwards.
- E. high pull headgear with long external arms parallel to the occlusal plane.
Hint
Locate the centre of resistance of the upper first molar relative to the tube and ask how the outer bow must be shaped so the force line passes through it.
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