I noticed your post didn't mention what area you are from, you might want to repost and include that. I was able to find that you are in Downingtown by clicking on your name.
I have had very good experiences with Chester Springs Family Dentistry, and so has my cousin whose 6 year old son has had a lot of work done there and was very pleased. They are located right off Route 100 in Eagle, near the Eagle Tavern.
http://www.chesterspringsfamilydentistry.com/
I love my pediatrician but he/they are in Phoenixville, probably a bit of a hike for you. Penn Care for Kids, specifically Dr. Schwartz.
Welcome to the area and good luck! Feel free to contact me if you have any other questions about the area.
L.