Your teeth age as the rest of your body does, so decay, fillings, trauma or even just normal chewing habits can wear down your teeth over time. A gold dental crown or a cap is a cover that is placed over a tooth to protect a weakened tooth from further weakening. A gold crown can protect a tooth that has had a root canal. Finally, a new gold crown can simply replace a deteriorated or defective crown.
In general, the more precious metal or gold content in the metal the better the fit and better for the health of the gums around the crown. The fit is very important in sealing out the bacteria that could get between the crown and the tooth, which could lead to tooth decay or premature failure of the crown.