Composites are also toxic. They are composed of bisphenol-
A,formaldehyde,toluene,silane,xylene,aluminum,hexane,hydroquinone,acryla
te, phenol ,polyeurethane etc.Teeth are composed of calcium and
phosphorous. If U.S. dentistry was not a self regulating
profession ,they would have come up with non toxic materials long
ago.Incidently,"porcelain" crowns are mainly aluminum and nickel.
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