Fluoride makes the tooth enamel stronger, and your teeth are less likely to suffer from the intake of acidic foods and drinks. Using fluoride toothpaste helps to remineralize the areas affected by decay and protect them from the bacteria responsible for tartar formation (1).
Brass is a buttery yellow alloy of zinc and copper which has been manufactured for thousands of years in many parts of the world.
Brass and Bronze are metal alloys used extensively in everyday objects. While brass is an alloy of copper and zinc, bronze is an alloy consisting mainly of copper, combined most often with tin, but at times also with other metals.