i have always had not the best teeth, which I inherit from my dads side. Okay, so I brush my teeth twice a day along with using mouth wash and floss, however I still keep getting cavities!! My dentist said it it genetic since my dad, who goes to the same dentist, gets cavities all the time and has had many root canals. I take good care of my teeth, but no matter what I do I keep getting cavities. Is there something else I can be doing to prevent them? When I was little I didn't brush my teeth as much as I should have but I got minimal cavities. Now that I am 16 I am getting them all the time - even though I now take care of my teeth religiously. I haven't been to the dentist in about a year due to family costs, and couple of my back teeth look black at the bottoms and hurt...and I don't understand why I have them in the first place. Can someone give me advice?