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.
Phosphorus is an essential mineral that is required by every cell in the body for normal function . Bound to oxygen in all biological systems, phosphorus is found as phosphate (PO 4 3-) in the body. Approximately 85% of the body's phosphorus is found in bones and teeth . Function Phosphorus is a major structural component of bone in the form of a calcium phosphate salt called hydroxyapatite.