Hi, I know this is an old post but...I live in East Falls and am also looking. Where did you end up?
I take my daughter to Gentle Dental in Haverford. I'm not sure if it's really holistic but they are really gentle and lovely. My daughter is at ease the entire time.
Do you know if they are mercury free and use digital x-rays?
They told me they are mercury free. We've never had an x-rays done. My friend actually had all her old mercury fillings removed and replaced with this practice.
They dont' specialize in pediatric dentistry though.
Sorry--- wanted to add--- they were wonderful with my little one. Very gentle and non-alarmist. They are that way with me too.