McDonald J L, Stookey G K
J Dent Res. 1978 Feb;57(2):349-54. doi: 10.1177/00220345780570023501.
Two rat plaque-caries studies indicated that a 0.2% chlorhexidine solution topically applied to rat teeth was effective in reducing dental plaque. This reduction in plaque was accompanied by marked reductions in smooth surface caries, but not in sulcal lesions.