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.
A multivalent nonmetal of the nitrogen group, phosphorus is commonly found in inorganic phosphate rocks. Phosphorus is a mineral that makes up 1% of your total body weight. While it is in every cell of your body, most of the phosphorus in your body is in your bones and teeth. Approximately 85% of your body's phosphorus is in your bones. 5 people found this useful.