Orthodontics: Appliances and Assisting · CDA

What is the purpose of a palatal expander in orthodontic treatment?

To maintain arch space after premature loss of baby teeth
To widen the upper jaw and create space for alignment
To move the lower anterior teeth forward into the arch
To retain and stabilize teeth after braces are removed

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Correct answer: To widen the upper jaw and create space for alignment

A palatal expander exerts lateral pressure on the upper molars, gradually widening the maxillary arch. This helps resolve crowding or crossbite by creating needed space.

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