Shark in the water!!!
Not really.
The story, "My kid went to the Dentist for a chipped tooth and came home with a silver grill" demands scrutiny.
Not because we don't believe the O.P., but because we are wondering why/how it could happen.
Yep, I'm a Father of two and they have had many a dental procedures. None of which resulted in a new set of chrome chompers.
EDIT: I should also mention that I just spent 6K on new teeth for myself. They had to gas and drug the hell out of me in order to grind my teeth into nubs before capping them.
EDIT2: No, I'm not from England. I spent many years living way too hard.