Question 167 · LDEK · Fixed appliances
The hyrax screw enables to increase the maxillary expansion range of:
- A. 15-20 mm.
- B. 7-15 mm.
- C. 1-7 mm.
- D. 0.2 mm per month.
- E. this screw is not used for this purpose.
Hint
Recall the range of commercially available Hyrax screw sizes used in rapid maxillary expanders.
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