NCT00066040.

Trial name or title	Prevention of transmission of bacteria that cause cavities from mothers to their children
Methods	RCT
Participants	Recruitment target: 280 participants Inclusion criteria: first‐time medically healthy mother ≤ 35 years, with at least 20 teeth and high levels of mutans streptococci and their infants ≥ 2 months of age Exclusion criteria: no fluoride exposure in the previous 6 months; no cognitive impairment; < 2 months Setting: Brazil
Interventions	1) Cervite chlorhexidine varnish applied to dentition of mothers 2) Duraphat fluoride varnish applied to dentition of mothers 3) Maternal consumption of xylitol gum (from Fennbon, Finland)
Outcomes	Outcome(s): mutans streptococci in mothers and infants; dental caries in children (no further details)
Starting date	January 2001
Contact information	Walter Bretz, email: not reported
Notes	Study completed in January 2006