Tooth stain during 2 years' use of chlorhexidine‐ and fluoride‐containing

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Abstract
The effect of fluoride upon the stain-inducing capacity of chlorhexidine was studied. Children (91), 13 yr of age, volunteered for the experiment. Three test dentifrices were used, containing 0.1% NaF, 0.1% NaF + 2% chlorhexidine and 2% chlorhexidine, respectively. The experiment was carried out as a double-blind test and the degree of staining was recorded after 1 and 2 yr. Four methods were used for stain scoring. The results after 1 yr showed that chlorhexidine induced less stain when applied together with fluoride than when applied alone. After 2 yr this difference disappeared, indicating that fluoride only retarded chlorhexidine-induced staining of teeth.