I just went through something like this with my 9 year old. She was tripped in gym class, and smashed face first into the gym floor. In our case, the ped dentist did have us come in and took xrays, including some to make sure her nose and jaw weren't fractured. We had to keep her on a soft diet for two weeks so as to not put any additional stress on the teeth, and then we had a followup.
The dentist said that fortunately things look good, but to be on the lookout for the appearance of pimples as that signifies an infection. It was my understanding that if the teeth got infected, we'd be looking at root canals. I'm still nervous about it.
I'm sorry your dc is dealing with this.