In general, stainless steel crowns are used for children's teeth because they don't require multiple dental visits to put in place and so are more cost- effective than custom-made crowns and prophylactic dental care needed to protect a tooth without a crown.
Phosphorus comes from many places. You might think that the biggest sources of phosphorus are the obvious onesâsewage treatment plants, chemical factories, and the like. But in fact, identifiable sources such as these contribute less than 20% of the phosphorus in the river.
Scientists use phosphorus to make baking soda. Go take a look in your refrigerator. Maybe your mom keeps baking soda in there to take away the smell of the food. When you see that white powder you'll know that scientists used phosphorus to make it.Phosphorus is also used to make dishes. Fine china is very expensive because a lot of special procedures go into making it. Phosphorus is one of the special elements that are used to make that fine china.hosphorus got its name because it glows in the dark. Phosphorus is from the Greek words ph s (light) and phoros (bearer), meaning bringer of light, and the ancient name for the planet Venus when it appears before sunrise. Its symbol is P, from p hosphorus. H i s t o r y.