Is it true that a completely white set of dentures is forbidden (haram), and that it must contain one or more teeth made of gold or silver?

Whoever wears dentures due to tooth loss is not forbidden from wearing white teeth, nor is he required to wear gold teeth, because the use of gold for men is not permissible except out of necessity, such as for binding a tooth. As for someone whose teeth are natural, it is not permissible for him to wear dentures over them due to the deception and alteration of creation involved therein.