R.C.
I have always heard that the later they got their baby teeth, the later they will lose them. (I have also heard that the longer they keep baby teeth, the stronger the permanent teeth are, but I don't know if that is true. I have one child who didn't lose his until he was 7 1/2. He has been slow to lose his (we found out he was actually missing some permanent teeth for whatever reason). Our daughter was over 6. We have two more kids to go. I teach kindergarten, and some years I have kids with a mouth full of lost teeth, some don't lose one that year.