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Potential Efficacy of Chlorhexidine against Mutans Streptococci and Human Dental Caries

Department of Cariology, University of Goteborg, Faculty of Odontology, Medicinargatan 12, S-413 90 Goteborg, Sweden

Chemotherapeutic agents have been considered as having potential for the prevention of dental caries. Several substances have been evaluated as possible candidates, but no antimicrobial agent, with the exception of fluoride, has received as much experimental attention as the bisbiguanide chlorhexidine. This substance represents, so far, the most effective and best-documented agent. To be effective against caries, therapeutic dosages of the antimicrobial agent have to be given for a sufficient but finite time period to sites with established cariogenic plaque. In studies where this principle has been used, the aim has been to eliminate or strongly suppress the population of mutans streptococci. Of various antimicrobial agents and methods tested, the most persistent reduction of mutans streptococci has been achieved by chlorhexidine varnishes, followed by gels and mouthwashes. The best clinical effect resulting in a considerable caries reduction has been obtained when persons highly colonized with mutans streptococci have been treated with gels and when the results of the antimicrobial measures have been verified by microbiological examination.

Key Words: Antimicrobials • Chlorhexidine • Mutans Streptococci • Dental Caries

Journal of Dental Research, Vol. 73, No. 3, 682-691 (1994)
DOI: 10.1177/00220345940730031401


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