I would get a second opinion.
I use a family dentist (although a pediatric one would be best) our dentist has kids the same age as mine and has become almost by default a pediatric dentist because he sees so many children. There are a bunch of us who take ourselves and our kids to him.
He is very very good at explaining the whys of filling, vs root canals, vs pulling...which teeth to hold on to as long as possible....why we should pull instead of a baby root canal and use a spacer (turned out he was able to fill it....but it was a close call depth wise).
He refers to an amazing orthodontist and oral surgeon and other dentists including pediatric if you want one. And he has one full time dental hygienist that only cleans children's teeth and she is awesome with the kids!!
But he really explains the why factor of everything to us and encourages us to research it ourselves. So, I would ask some mom friends who they use and get a second opinion.