Original sentence: ,  Due to the known toxicity of mercury, the main component of amalgam fillings, there is some ongoing controversy on the use of this filling material.Amalgams were the first standardized dental filling material.Because of these problems, this formula was abandoned in France.In 1833, however, two Europeans, the Crawcour brothers, brought Taveau's amalgam to the United States under the name "Royal Mineral Succedaneum".Taveau's formula offered lower cost and greater ease of use compared to existing materials such as gold, but had many practical problems, including a tendency to significantly expand after setting.The Chinese were the first to use a silver amalgam to fill teeth in the 7th century; in 1816, Auguste Taveau developed his own dental amalgam from silver coins and mercury.This amalgam contained a very small amount of mercury and had to be heated in order for the silver to dissolve at an appreciable rate
Edited sentence: ,  Due to the known toxicity of mercury, the main component of amalgam fillings, there is an ongoing dental amalgam controversy on the use of this filling material.See also: Dental amalgam controversy