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ADA NBDHE Dental Hygienist

Category - Provision of Clinical Dental Hygiene Services

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What stage of tooth development is termed the “ugly duckling” stage?

Primary
Permanent
Mixed
No such stage

Explanation

Answer: C - The mixed stage of tooth development is termed the “ugly duckling” stage. This is due to edentulated areas, disproportionately-sized teeth, and crowding. There is varying clinical crown heights, enlarged and edematous gingiva, and different tooth colors. This stage is between the ages of 6 and 12.

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