OBJECTIVE	To evaluate the long-term outcome of a mother-child project in which mothers ( n = 173 ) with high counts of salivary mutans streptococci were randomly assigned to daily chewing gums containing xylitol ( A ) , chlorhexidine / xylitol/sorbitol ( B ) , or sodium fluoride/xylitol/sorbitol ( C ) for one year , when the child was between 6 and 18 months .\