How important is it for an 18 month old to 'properly' brush their teeth? My dd won't let me even try to help her so she just kind of sucks on the brush and dips it in and out of the glass of water (she loves the taste of toothpaste and would just use it as a toothpaste spatula if I let her ) until she gets bored. We get her to 'brush' her teeth in the morning with us and at night in her bath but to be honest they aren't being brushed at all and I can't seem to get her to get the hang of it. Will she lose all those little pearly whites?