A child with Down's syndrome has Moon facies, retarded mentally and which of the facial characteristic________________?
Correct answer: D. Maxillary hypoplasia
- A. Maxillary prognathism
- B. Mandibular retrognathia
- C. Mandibular prognathism
- D. Maxillary hypoplasia
Explanation
Down syndrome commonly produces midface and maxillary hypoplasia, with a flat nasal bridge and the appearance of relative mandibular prognathism. Maxillary prognathism is therefore the opposite of the typical facial pattern.
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