Agreed - Hermione would have a strong bond with her parents.
Because they're dentists, they seem like very down-to-earth people - like their daughter, who is the smartest witch at Hogwarts.
As Muggles, they would have known nothing about the wizarding world they allowed their daughter to step into - however, the fact that they allowed her this implies that Hermione had persuaded them to let her. This proves their trust in their daughter, and that they want what's best for her.
They seem like tolerant people, too, when seen tlaking to Mr. Weasley upon one of their infrequent visits to the Wizarding World.
All in all, considering Hermione's attitude towards them, they seem to have a close and open bond with their daugter.
So, yeah, the above comments seconded
