You can if you itemize and the total expenses for you, your spouse, and your dependents exceed 10% of your adjusted gross income (7.5% if you're 65 or older as of December 31, 2016). The deduction is limited to the expenses above and beyond this amount.
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http://www.investopedia.com/ask/answers/112415/dental-insurance-tax-deductible.asp">http://www.inves...>
