The oral retention and antiplaque efficacy of triclosan in human volunteers.

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Abstract
An antiplaque toothpaste containing 0.2% (w/w) triclosan significantly inhibited overnight plaque growth in 12 human volunteers. After use of a 1 g quantity of the toothpaste containing 0.2% (w/w) [3H]‐triclosan, 36.3 +/‐ 1.4% of the triclosan was retained. The mean concentration (+/‐ s.d.) achieved in saliva 5 min after toothpaste use was 8.16 +/‐ 2.50 micrograms g‐1. The saliva decay curve for triclosan was consistent with a two phase model with t1/2 values of 0.45 h and 2.42 h, respectively. Triclosan was present in bacterial plaque for at least 8 h after dosage and in the oral mucosa for at least 3 h.