Question

Tooth fillings are often made of gold or porcelain because these materials are ______.

Answer 1

Tooth fillings are often made of gold or porcelain because these materials are nonreactive.

b. nonreactive.

Answer 2

Tooth fillings are often made of gold or porcelain because these materials are:

b. nonreactive

That means that they don't corrode or rust and they are resistible to staining.Their thermal conductibility is low.

Explanation:

Porcelain-fused-to-metal crowns. PFM crowns are an approximately esthetic improvement that has been in use for more than 40 years. In one way, they blend the best of both worlds, a crown made of “refined or noble” metal (gold or platinum), which is strong, fits correctly and is bonded/bonded to the tooth.