I call them shark teeth because the permanent teeth come in behind the baby teeth and push out the baby teeth (like a shark). My daughter had those for her bottom front teeth, and eventually the baby teeth came out (after about of month of being loose). Her permanent teeth look fine. I'm not sure what is going on with her top teeth. She thinks they are loose.
As for the dentist, the roots of your daughters teeth may be very long, or the roots may be fused to her jaw (my brother had that trouble). Only the dentist can tell, so it is worth the visit. I think the worry is the baby teeth are not loose.
I've resigned myself to eventual orthodontia.