Controlled trials of dental amalgam are needed

doi:10.1136/bmj.309.6962.1161

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E A A Baldwin*

EDITOR, - The response of almost every writer from the dental profession to the suggestion that dental amalgam is hazardous to health is that adopted by Ivar A Mjor: to sit back and challenge the opponents of amalgam to produce proof of harm.1 Not only is this notoriously difficult to do, as …