Yes. Dental work that is medically necessary, such as when your teeth are unfixable, is deductible as an itemized expense.
Itemized expenses include mortgage interest, gambling losses up to winnings, charitable contributions, state and local taxes up to $10,000, medical expenses in excess of 7.5% of your AGI and casualty and losses in excess of 10% of you AGI with the first $100 not counting towards the loss. Your dental work and all medical expenses are only deductible for the amount that is over 7.5% of your AGI. This means if your AGI is $50,000, then the amount that is over $3,750 is deductible.
Then your total itemized expenses would need to be greater than your standard deduction below in order to benefit from your expenses.