I just found out that a Dentist drill my gold crown tooth and put silver filling on top. Putting filling in a crown is totally illogical to me - I would have replaced the crown before putting filling it. Do Dentists really put filling a crown? The Dentist that showed me the damage suggested maybe I grind my teeth at night and damage the crown. I was never told that my crown had any damage. How can I find out which of the previous Dentist did this to my gold crown?