I use Dr. Nager for my dentist, too. Have not yet asked if he does kids, but am in about the same boat as you.

Also, I'm on a local moms list from which I have gleaned - RUN SCREAMING from that "kids dentistry" place in Porter Sq Galleria. Something about small kids parents being asked to go into the waiting room and then prevented from entering the room when their child was crying. Ack.