My son is nearly 20 now, but as a 5 year old, he has had dental sealants applied to all his back teeth in the school dental program. I am very happy, as he ahs had no filling required at all in that area, and only one filling in other eareas. So, I do not think it is a bad idea at all. He does not oil pull, he thinks I'm mad for doing it. He brushes his teeth twice a day. Unfortunately, our water is full fluoride.