Also, if you DO bring him to a dentist, as them about "MI PASTE".
My mom is a dental hygientist and gave me 2 tubes to put on Oni's teeth after each brushing. It's to protect the enamel, especially on the newer teeth that she gets!!
Trust me, if you're brushing twice a day, you're doing GREAT!! A lot better than most mommies out there.
Down here I see kids with ALL silver teeth. And they're only 2/3 years old! It's sad!
Sarah