Metal braces or ceramic braces?

Let's talk about how long it will take to use, because most cemented colloids will crack when they contact creep during the hardening period. Generally, it is better to chew after the creep period, so it is suggested that after 24 hours, as for the metal crown or porcelain crown, this is the main principle. The principle is that the front teeth are beautiful and the rear teeth are functional. Porcelain is beautiful, but its running function is not as good as that of metal crown. That is to say, people's teeth are exposed again, and porcelain crowns are made, and metal crowns are made in hidden places.