You probably have one on your desk: a photo of your little one that's positively, irresistibly adorable! If so, we'd like to see it. Why, you ask?

Well, February 1 is the first day of National Children's Dental Health Month. This annual event, sponsored by the American Dental Association (ADA), is a great time to think about how to keep kids' smiles looking their very best — with a good daily oral hygiene routine and regular check-ups at the dentist's office. What better way to support this worthwhile cause than to show off the cutest kid smiles we can find?

So if you have a child 8 years old or younger with a cute smile — and a photo to prove it! — we invite you to enter Dear Doctor's Cutest Smile Photo Contest. Simply upload your photo to Dear Doctor's facebook page by February 12. On February 13, Entrants, their friends and the public can begin voting for each photo they like once per day through February 26. Share your photo with friends via facebook and e-mail so everyone will know to vote! A total of three prizes will be awarded to the top three vote-getters as follows:

• 1st Place Winner: $300 VISA gift card
• 2nd Place Winner: $150 VISA gift card
• 3rd Place Winner: $50 VISA gift card

So remember, the contest entry period begins at 12:01 a.m. (E.S.T.) on February 1, 2012 and closes at 11:00 p.m. (E.S.T.) on February 12, 2012. The contest voting period begins at 1:00 a.m. (E.S.T.) on February 13, 2012 and closes at 11:00 p.m. (E.S.T.) on February 26, 2012.

To be eligible to enter the Contest, an Entrant must be a U.S. or Canadian citizen or permanent legal resident and be at least 18 years of age at the time of submission of the entry. Contest is void in Quebec, Puerto Rico, U.S. territories and possessions outside of the U.S., and where prohibited by law. The child whose photo is submitted must be no older than 8 years of age as of February 1, 2012.

Good luck!