Laboratory Study on the Whitening Ability of A New Type of Toothpaste Against the Tobacco Stains on

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A whitening toothpaste containing pyrrolidone groups was developed.Through the stain-removal experiment on the hydroxyapatite discs with tobacco stains,the stain-removal abilities of ammonium acryloyldimethyltaurate/VP copolymer and its toothpaste were st
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