Last Updated
：2025/11/23
palatal expander
（ plural ）
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(dentistry) A device used to widen the upper jaw so that the bottom and upper teeth will fit together better.
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palatal expander
My orthodontist recommended wearing a palatal expander to correct my narrow upper jaw before getting braces.
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My orthodontist recommended wearing a palatal expander to correct my narrow upper jaw before getting braces.
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