Our Comment:
Chlorhexidine is obviously an easily tolerated and effective antiseptic for the daily practice and surgery. Its oral use is also well documented (e.g. in ill subjects who cannot brush their teeth adequately). However, the teeth discolorations that are caused by the drug are disturbing. It has not yet been established whether chlorhexidine plays a role in the eradication of streptococcus mutans in the prevention of caries.