Interest in a vaccine for dental caries prevention dates back to a
period when the lactobacilli were thought to be of paramount importance
in the initiation of dental caries. By means of immunization with a
homologous lactobacillus vaccine, in 1944 William was partially
successful in reducing the number of lactobacilli in human saliva. More
recently, the understanding of the important role that streptococcus
mutans plays in the initiation of caries has a re-awakening of interest
in the vaccine approach, as evidenced by the numerous experimental
attempts to control caries immunologically in laboratory animals such as
rats and monkeys. Although results have not always been encouraging, the
development of a caries vaccine is considered a highly desirable goal
because of the potential important public health implications. Though
the research on the caries vaccine started in 1930, much attention has
been given to it only in the last three decades. Since then, many new
vaccines have been developed and continued research in this field has
also disclosed the potential drawbacks.